diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/controller/AdminPostingKeywordController.java b/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/controller/AdminPostingKeywordController.java
new file mode 100644
index 00000000..1a9f57cd
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/controller/AdminPostingKeywordController.java
@@ -0,0 +1,84 @@
+package com.dreamteam.alter.adapter.inbound.admin.posting.controller;
+
+import com.dreamteam.alter.adapter.inbound.admin.posting.dto.AdminPostingKeywordRequestDto;
+import com.dreamteam.alter.adapter.inbound.admin.posting.dto.AdminPostingKeywordResponseDto;
+import com.dreamteam.alter.adapter.inbound.common.dto.CommonApiResponse;
+import com.dreamteam.alter.domain.posting.command.AdminCreatePostingKeywordCommand;
+import com.dreamteam.alter.domain.posting.command.AdminUpdatePostingKeywordCommand;
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+import com.dreamteam.alter.domain.posting.port.inbound.AdminCreatePostingKeywordUseCase;
+import com.dreamteam.alter.domain.posting.port.inbound.AdminDeletePostingKeywordUseCase;
+import com.dreamteam.alter.domain.posting.port.inbound.AdminGetPostingKeywordListUseCase;
+import com.dreamteam.alter.domain.posting.port.inbound.AdminUpdatePostingKeywordUseCase;
+import jakarta.annotation.Resource;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/admin/posting-keywords")
+@PreAuthorize("hasAnyRole('ADMIN')")
+@RequiredArgsConstructor
+@Validated
+public class AdminPostingKeywordController implements AdminPostingKeywordControllerSpec {
+
+    @Resource(name = "adminGetPostingKeywordList")
+    private final AdminGetPostingKeywordListUseCase adminGetPostingKeywordList;
+
+    @Resource(name = "adminCreatePostingKeyword")
+    private final AdminCreatePostingKeywordUseCase adminCreatePostingKeyword;
+
+    @Resource(name = "adminUpdatePostingKeyword")
+    private final AdminUpdatePostingKeywordUseCase adminUpdatePostingKeyword;
+
+    @Resource(name = "adminDeletePostingKeyword")
+    private final AdminDeletePostingKeywordUseCase adminDeletePostingKeyword;
+
+    @Override
+    @GetMapping
+    public ResponseEntity<CommonApiResponse<List<AdminPostingKeywordResponseDto>>> getPostingKeywordList() {
+        List<AdminPostingKeywordResponseDto> result = adminGetPostingKeywordList.execute().stream()
+            .map(AdminPostingKeywordResponseDto::from)
+            .toList();
+        return ResponseEntity.ok(CommonApiResponse.of(result));
+    }
+
+    @Override
+    @PostMapping
+    public ResponseEntity<CommonApiResponse<AdminPostingKeywordResponseDto>> createPostingKeyword(
+        @Valid @RequestBody AdminPostingKeywordRequestDto request
+    ) {
+        PostingKeyword created = adminCreatePostingKeyword.execute(
+            new AdminCreatePostingKeywordCommand(request.getName(), request.getDescription())
+        );
+        return ResponseEntity.status(HttpStatus.CREATED)
+            .body(CommonApiResponse.of(AdminPostingKeywordResponseDto.from(created)));
+    }
+
+    @Override
+    @PutMapping("/{id}")
+    public ResponseEntity<CommonApiResponse<Void>> updatePostingKeyword(
+        @PathVariable Long id,
+        @Valid @RequestBody AdminPostingKeywordRequestDto request
+    ) {
+        adminUpdatePostingKeyword.execute(
+            id, new AdminUpdatePostingKeywordCommand(request.getName(), request.getDescription())
+        );
+        return ResponseEntity.ok(CommonApiResponse.empty());
+    }
+
+    @Override
+    @DeleteMapping("/{id}")
+    public ResponseEntity<CommonApiResponse<Void>> deletePostingKeyword(
+        @PathVariable Long id
+    ) {
+        adminDeletePostingKeyword.execute(id);
+        return ResponseEntity.ok(CommonApiResponse.empty());
+    }
+}
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/controller/AdminPostingKeywordControllerSpec.java b/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/controller/AdminPostingKeywordControllerSpec.java
new file mode 100644
index 00000000..2c3eecaa
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/controller/AdminPostingKeywordControllerSpec.java
@@ -0,0 +1,53 @@
+package com.dreamteam.alter.adapter.inbound.admin.posting.controller;
+
+import com.dreamteam.alter.adapter.inbound.admin.posting.dto.AdminPostingKeywordRequestDto;
+import com.dreamteam.alter.adapter.inbound.admin.posting.dto.AdminPostingKeywordResponseDto;
+import com.dreamteam.alter.adapter.inbound.common.dto.CommonApiResponse;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+
+import java.util.List;
+
+@Tag(name = "ADMIN - 업종(키워드) 관리 API")
+public interface AdminPostingKeywordControllerSpec {
+
+    @Operation(summary = "업종 목록 조회", description = "관리자가 등록된 업종(키워드) 전체 목록을 조회합니다.")
+    @ApiResponses(value = {
+        @ApiResponse(responseCode = "200", description = "업종 목록 조회 성공")
+    })
+    ResponseEntity<CommonApiResponse<List<AdminPostingKeywordResponseDto>>> getPostingKeywordList();
+
+    @Operation(summary = "업종 생성", description = "관리자가 새 업종(키워드)을 등록합니다. 이름은 중복될 수 없습니다.")
+    @ApiResponses(value = {
+        @ApiResponse(responseCode = "201", description = "업종 생성 성공"),
+        @ApiResponse(responseCode = "400", description = "이름 중복 또는 유효성 검증 실패")
+    })
+    ResponseEntity<CommonApiResponse<AdminPostingKeywordResponseDto>> createPostingKeyword(
+        @Valid @RequestBody AdminPostingKeywordRequestDto request
+    );
+
+    @Operation(summary = "업종 수정", description = "관리자가 업종(키워드)의 이름/설명을 수정합니다.")
+    @ApiResponses(value = {
+        @ApiResponse(responseCode = "200", description = "업종 수정 성공"),
+        @ApiResponse(responseCode = "400", description = "이름 중복 또는 존재하지 않는 업종")
+    })
+    ResponseEntity<CommonApiResponse<Void>> updatePostingKeyword(
+        @PathVariable Long id,
+        @Valid @RequestBody AdminPostingKeywordRequestDto request
+    );
+
+    @Operation(summary = "업종 삭제", description = "관리자가 업종(키워드)을 삭제합니다. 공고에서 사용 중인 업종은 삭제할 수 없습니다.")
+    @ApiResponses(value = {
+        @ApiResponse(responseCode = "200", description = "업종 삭제 성공"),
+        @ApiResponse(responseCode = "409", description = "공고에서 사용 중인 업종")
+    })
+    ResponseEntity<CommonApiResponse<Void>> deletePostingKeyword(
+        @PathVariable Long id
+    );
+}
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/dto/AdminPostingKeywordRequestDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/dto/AdminPostingKeywordRequestDto.java
new file mode 100644
index 00000000..747c9c02
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/dto/AdminPostingKeywordRequestDto.java
@@ -0,0 +1,24 @@
+package com.dreamteam.alter.adapter.inbound.admin.posting.dto;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.Size;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+@AllArgsConstructor
+@Schema(description = "업종(키워드) 생성/수정 요청 DTO")
+public class AdminPostingKeywordRequestDto {
+
+    @NotBlank
+    @Size(max = 128)
+    @Schema(description = "업종명", example = "카페")
+    private String name;
+
+    @Size(max = 255)
+    @Schema(description = "업종 설명", example = "카페/디저트 매장")
+    private String description;
+}
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/dto/AdminPostingKeywordResponseDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/dto/AdminPostingKeywordResponseDto.java
new file mode 100644
index 00000000..344faaad
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/admin/posting/dto/AdminPostingKeywordResponseDto.java
@@ -0,0 +1,34 @@
+package com.dreamteam.alter.adapter.inbound.admin.posting.dto;
+
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+@Builder(access = AccessLevel.PRIVATE)
+@Schema(description = "업종(키워드) 응답 DTO")
+public class AdminPostingKeywordResponseDto {
+
+    @Schema(description = "업종 ID", example = "1")
+    private Long id;
+
+    @Schema(description = "업종명", example = "카페")
+    private String name;
+
+    @Schema(description = "업종 설명", example = "카페/디저트 매장")
+    private String description;
+
+    public static AdminPostingKeywordResponseDto from(PostingKeyword keyword) {
+        return AdminPostingKeywordResponseDto.builder()
+            .id(keyword.getId())
+            .name(keyword.getName())
+            .description(keyword.getDescription())
+            .build();
+    }
+}
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/CreatePostingRequestDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/CreatePostingRequestDto.java
index e546c2a0..9f4bafe2 100644
--- a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/CreatePostingRequestDto.java
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/CreatePostingRequestDto.java
@@ -3,10 +3,12 @@
 import com.dreamteam.alter.domain.posting.type.PaymentType;
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.Valid;
+import jakarta.validation.constraints.AssertTrue;
 import jakarta.validation.constraints.NotBlank;
-import jakarta.validation.constraints.NotEmpty;
 import jakarta.validation.constraints.Positive;
+import jakarta.validation.constraints.Size;
 import lombok.*;
+import org.apache.commons.lang3.ObjectUtils;
 
 import java.util.List;
 
@@ -39,10 +41,13 @@ public class CreatePostingRequestDto {
     @NotNull
     private PaymentType paymentType;
 
-    @Schema(description = "키워드", example = "[2, 3, 1]")
-    @NotEmpty
+    @Schema(description = "마스터 업종 ID 목록 (선택)", example = "[2, 3, 1]")
     private List<Long> keywords;
 
+    @Schema(description = "직접입력 업종 (마스터 미등록, 공고 라벨로 저장)", example = "[\"브런치카페\"]")
+    @Size(max = 10)
+    private List<@NotBlank @Size(max = 128) String> customKeywords;
+
     @Schema(description = "공고 스케줄", example = "[" +
             "{" +
                 "\"workingDays\": [\"MONDAY\", \"WEDNESDAY\"], \"startTime\": \"09:00\", \"endTime\": \"18:00\", \"positionsNeeded\": 3, \"position\": \"설거지\"" +
@@ -54,4 +59,10 @@ public class CreatePostingRequestDto {
     @Valid
     private List<CreatePostingScheduleRequestDto> schedules;
 
+    @Schema(hidden = true)
+    @AssertTrue(message = "업종은 최소 1개 이상 선택하거나 직접 입력해야 합니다.")
+    public boolean isKeywordProvided() {
+        return ObjectUtils.isNotEmpty(keywords) || ObjectUtils.isNotEmpty(customKeywords);
+    }
+
 }
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingDetailResponseDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingDetailResponseDto.java
index b4f5863e..278186fc 100644
--- a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingDetailResponseDto.java
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingDetailResponseDto.java
@@ -48,9 +48,13 @@ public class PostingDetailResponseDto {
     private LocalDateTime createdAt;
 
     @NotNull
-    @Schema(description = "키워드", example = "[{\"id\":1,\"name\":\"카페\"},{\"id\":4,\"name\":\"분식\"}]")
+    @Schema(description = "키워드(마스터 업종)", example = "[{\"id\":1,\"name\":\"카페\"},{\"id\":4,\"name\":\"분식\"}]")
     private List<PostingKeywordListResponseDto> keywords;
 
+    @NotNull
+    @Schema(description = "직접입력 업종", example = "[\"브런치카페\"]")
+    private List<String> customKeywords;
+
     @NotNull
     @Schema(description = "공고 스케줄", example = "[{\"id\":1,\"workingDays\":[\"MONDAY\",\"WEDNESDAY\"],\"startTime\":\"09:00\",\"endTime\":\"18:00\",\"positionsNeeded\":3,\"positionsAvailable\":2,\"position\":\"홀서빙\"}]")
     private List<PostingScheduleResponseDto> schedules;
@@ -77,6 +81,7 @@ public static PostingDetailResponseDto from(
             .keywords(entity.getPostingKeywords().stream()
                 .map(PostingKeywordListResponseDto::from)
                 .toList())
+            .customKeywords(entity.getCustomKeywords())
             .scrapped(entity.isScrapped())
             .build();
     }
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingFilterOptionsResponseDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingFilterOptionsResponseDto.java
index 05f61292..51040da9 100644
--- a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingFilterOptionsResponseDto.java
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingFilterOptionsResponseDto.java
@@ -1,6 +1,7 @@
 package com.dreamteam.alter.adapter.inbound.general.posting.dto;
 
 import com.dreamteam.alter.adapter.inbound.common.dto.DescribedEnumDto;
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
 import com.dreamteam.alter.domain.posting.type.PostingSortType;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.*;
@@ -26,11 +27,15 @@ public class PostingFilterOptionsResponseDto {
     @Schema(description = "정렬 옵션 목록")
     private List<DescribedEnumDto<PostingSortType>> sortOptions;
 
+    @Schema(description = "업종(마스터) 추천 목록 — 필터 검색어 자동완성/칩 용도")
+    private List<PostingKeywordListResponseDto> keywords;
+
     public static PostingFilterOptionsResponseDto of(
         List<String> provinces,
         List<String> districts,
         List<String> towns,
-        List<PostingSortType> sortOptions
+        List<PostingSortType> sortOptions,
+        List<PostingKeyword> keywords
     ) {
         return PostingFilterOptionsResponseDto.builder()
             .provinces(provinces)
@@ -40,6 +45,10 @@ public static PostingFilterOptionsResponseDto of(
                 .map(sortType -> DescribedEnumDto.of(sortType, PostingSortType.describe()))
                 .toList()
             )
+            .keywords(keywords.stream()
+                .map(PostingKeywordListResponseDto::from)
+                .toList()
+            )
             .build();
     }
 
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingListFilterDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingListFilterDto.java
index 3f832039..7901320d 100644
--- a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingListFilterDto.java
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingListFilterDto.java
@@ -37,4 +37,7 @@ public class PostingListFilterDto {
 
     @Parameter(description = "급여순 정렬 여부")
     private Boolean payAmountSort;
+
+    @Parameter(description = "업종 검색어 (마스터 업종명 또는 직접입력 업종 부분일치)")
+    private String keyword;
 }
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingListResponseDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingListResponseDto.java
index 0d977a4a..6a98083e 100644
--- a/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingListResponseDto.java
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/general/posting/dto/PostingListResponseDto.java
@@ -38,9 +38,13 @@ public class PostingListResponseDto {
     private LocalDateTime createdAt;
 
     @NotNull
-    @Schema(description = "키워드", example = "[{\"id\":1,\"name\":\"카페\"},{\"id\":4,\"name\":\"분식\"}]")
+    @Schema(description = "키워드(마스터 업종)", example = "[{\"id\":1,\"name\":\"카페\"},{\"id\":4,\"name\":\"분식\"}]")
     private List<PostingKeywordListResponseDto> keywords;
 
+    @NotNull
+    @Schema(description = "직접입력 업종", example = "[\"브런치카페\"]")
+    private List<String> customKeywords;
+
     @NotNull
     @Schema(description = "공고 스케줄", example = "[" +
         "{" +
@@ -73,6 +77,7 @@ public static PostingListResponseDto from(PostingListResponse entity) {
             .keywords(entity.getPostingKeywords().stream()
                 .map(PostingKeywordListResponseDto::from)
                 .toList())
+            .customKeywords(entity.getCustomKeywords())
             .workspace(PostingListWorkspaceResponseDto.from(entity.getWorkspace()))
             .scrapped(entity.isScrapped())
             .build();
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/ManagerPostingDetailResponseDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/ManagerPostingDetailResponseDto.java
index 026ec861..4949a28e 100644
--- a/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/ManagerPostingDetailResponseDto.java
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/ManagerPostingDetailResponseDto.java
@@ -59,9 +59,13 @@ public class ManagerPostingDetailResponseDto {
     private LocalDateTime updatedAt;
 
     @NotNull
-    @Schema(description = "키워드", example = "[{\"id\":1,\"name\":\"카페\"},{\"id\":4,\"name\":\"분식\"}]")
+    @Schema(description = "키워드(마스터 업종)", example = "[{\"id\":1,\"name\":\"카페\"},{\"id\":4,\"name\":\"분식\"}]")
     private List<PostingKeywordListResponseDto> keywords;
 
+    @NotNull
+    @Schema(description = "직접입력 업종", example = "[\"브런치카페\"]")
+    private List<String> customKeywords;
+
     @NotNull
     @Schema(description = "공고 스케줄", example = "[{\"id\":1,\"workingDays\":[\"MONDAY\",\"WEDNESDAY\"],\"startTime\":\"09:00\",\"endTime\":\"18:00\",\"positionsNeeded\":3,\"positionsAvailable\":2,\"position\":\"홀서빙\"}]")
     private List<PostingScheduleResponseDto> schedules;
@@ -83,6 +87,7 @@ public static ManagerPostingDetailResponseDto from(ManagerPostingDetailResponse
             .keywords(entity.getPostingKeywords().stream()
                 .map(PostingKeywordListResponseDto::from)
                 .toList())
+            .customKeywords(entity.getCustomKeywords())
             .build();
     }
 }
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/ManagerPostingListResponseDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/ManagerPostingListResponseDto.java
index 7a146026..2272de80 100644
--- a/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/ManagerPostingListResponseDto.java
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/ManagerPostingListResponseDto.java
@@ -41,9 +41,13 @@ public class ManagerPostingListResponseDto {
     private LocalDateTime createdAt;
 
     @NotNull
-    @Schema(description = "키워드", example = "[{\"id\":1,\"name\":\"카페\"},{\"id\":4,\"name\":\"분식\"}]")
+    @Schema(description = "키워드(마스터 업종)", example = "[{\"id\":1,\"name\":\"카페\"},{\"id\":4,\"name\":\"분식\"}]")
     private List<PostingKeywordListResponseDto> keywords;
 
+    @NotNull
+    @Schema(description = "직접입력 업종", example = "[\"브런치카페\"]")
+    private List<String> customKeywords;
+
     @NotNull
     @Schema(description = "공고 스케줄", example = "[" +
         "{" +
@@ -69,6 +73,7 @@ public static ManagerPostingListResponseDto from(ManagerPostingListResponse resp
             .keywords(response.getPostingKeywords().stream()
                 .map(PostingKeywordListResponseDto::from)
                 .toList())
+            .customKeywords(response.getCustomKeywords())
             .schedules(response.getSchedules().stream()
                 .map(PostingScheduleResponseDto::from)
                 .toList())
diff --git a/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/UpdatePostingRequestDto.java b/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/UpdatePostingRequestDto.java
index 63b30d7c..a461bf76 100644
--- a/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/UpdatePostingRequestDto.java
+++ b/src/main/java/com/dreamteam/alter/adapter/inbound/manager/posting/dto/UpdatePostingRequestDto.java
@@ -7,15 +7,17 @@
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.Valid;
+import jakarta.validation.constraints.AssertTrue;
 import jakarta.validation.constraints.NotBlank;
-import jakarta.validation.constraints.NotEmpty;
 import jakarta.validation.constraints.NotNull;
 import jakarta.validation.constraints.Positive;
+import jakarta.validation.constraints.Size;
 import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
+import org.apache.commons.lang3.ObjectUtils;
 
 @Getter
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
@@ -39,10 +41,13 @@ public class UpdatePostingRequestDto {
     @Schema(description = "급여 타입", example = "HOURLY")
     private PaymentType paymentType;
 
-    @NotEmpty
-    @Schema(description = "키워드", example = "[2, 3, 1]")
+    @Schema(description = "마스터 업종 ID 목록 (선택)", example = "[2, 3, 1]")
     private List<Long> keywords;
 
+    @Size(max = 10)
+    @Schema(description = "직접입력 업종 (마스터 미등록, 공고 라벨로 저장)", example = "[\"브런치카페\"]")
+    private List<@NotBlank @Size(max = 128) String> customKeywords;
+
     @Valid
     @Schema(description = "새로 추가할 스케줄", example = "[{\"workingDays\": [\"FRIDAY\"], \"startTime\": \"13:00\", \"endTime\": \"21:00\", \"positionsNeeded\": 1, \"position\": \"설거지\"}]")
     private List<CreatePostingScheduleRequestDto> createSchedules;
@@ -53,4 +58,10 @@ public class UpdatePostingRequestDto {
 
     @Schema(description = "삭제할 스케줄 ID", example = "[2, 3]")
     private List<Long> deleteScheduleIds;
+
+    @Schema(hidden = true)
+    @AssertTrue(message = "업종은 최소 1개 이상 선택하거나 직접 입력해야 합니다.")
+    public boolean isKeywordProvided() {
+        return ObjectUtils.isNotEmpty(keywords) || ObjectUtils.isNotEmpty(customKeywords);
+    }
 }
diff --git a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/PostingKeywordQueryRepositoryImpl.java b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/PostingKeywordQueryRepositoryImpl.java
index 28a40bff..fc56cdfe 100644
--- a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/PostingKeywordQueryRepositoryImpl.java
+++ b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/PostingKeywordQueryRepositoryImpl.java
@@ -2,6 +2,7 @@
 
 import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
 import com.dreamteam.alter.domain.posting.entity.QPostingKeyword;
+import com.dreamteam.alter.domain.posting.entity.QPostingKeywordMap;
 import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordQueryRepository;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import lombok.RequiredArgsConstructor;
@@ -35,4 +36,17 @@ public List<PostingKeyword> findAll() {
             .fetch();
     }
 
+    @Override
+    public boolean existsPostingUsingKeyword(Long keywordId) {
+        QPostingKeywordMap qPostingKeywordMap = QPostingKeywordMap.postingKeywordMap;
+
+        Integer exists = queryFactory
+            .selectOne()
+            .from(qPostingKeywordMap)
+            .where(qPostingKeywordMap.postingKeyword.id.eq(keywordId))
+            .fetchFirst();
+
+        return exists != null;
+    }
+
 }
diff --git a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/PostingQueryRepositoryImpl.java b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/PostingQueryRepositoryImpl.java
index 309fde81..a4db9db6 100644
--- a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/PostingQueryRepositoryImpl.java
+++ b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/PostingQueryRepositoryImpl.java
@@ -19,6 +19,7 @@
 import com.querydsl.core.types.OrderSpecifier;
 import com.querydsl.core.types.Projections;
 import com.querydsl.core.types.dsl.BooleanExpression;
+import com.querydsl.core.types.dsl.Expressions;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import lombok.RequiredArgsConstructor;
 import org.apache.commons.lang3.BooleanUtils;
@@ -41,6 +42,8 @@ public class PostingQueryRepositoryImpl implements PostingQueryRepository {
     public long getCountOfPostings(PostingListFilterDto filter) {
         QPosting qPosting = QPosting.posting;
         QPostingSchedule qPostingSchedule = QPostingSchedule.postingSchedule;
+        QPostingKeywordMap qPostingKeywordMap = QPostingKeywordMap.postingKeywordMap;
+        QPostingKeyword qPostingKeyword = QPostingKeyword.postingKeyword;
         QWorkspace qWorkspace = QWorkspace.workspace;
 
         Long count = queryFactory
@@ -48,6 +51,8 @@ public long getCountOfPostings(PostingListFilterDto filter) {
             .from(qPosting)
             .leftJoin(qPosting.schedules, qPostingSchedule)
             .leftJoin(qPosting.workspace, qWorkspace)
+            .leftJoin(qPosting.keywords, qPostingKeywordMap)
+            .leftJoin(qPostingKeywordMap.postingKeyword, qPostingKeyword)
             .where(
                 qPosting.status.eq(PostingStatus.OPEN),
                 eqProvince(qWorkspace, filter.getProvince()),
@@ -56,7 +61,8 @@ public long getCountOfPostings(PostingListFilterDto filter) {
                 gtePayAmount(qPosting, filter.getMinPayAmount()),
                 ltePayAmount(qPosting, filter.getMaxPayAmount()),
                 gteStartTime(qPostingSchedule, filter.getStartTime()),
-                lteEndTime(qPostingSchedule, filter.getEndTime())
+                lteEndTime(qPostingSchedule, filter.getEndTime()),
+                keywordMatches(qPostingKeyword, qPosting, filter.getKeyword())
             )
             .fetchOne();
 
@@ -96,6 +102,8 @@ public List<PostingListResponse> getPostingsWithCursor(CursorPageRequest<CursorD
             .from(qPosting)
             .leftJoin(qPosting.schedules, qPostingSchedule)
             .leftJoin(qPosting.workspace, qWorkspace)
+            .leftJoin(qPosting.keywords, qPostingKeywordMap)
+            .leftJoin(qPostingKeywordMap.postingKeyword, qPostingKeyword)
             .where(
                 qPosting.status.eq(PostingStatus.OPEN),
                 cursorConditions(qPosting, request.cursor(), filter.getPayAmountSort()),
@@ -105,7 +113,8 @@ public List<PostingListResponse> getPostingsWithCursor(CursorPageRequest<CursorD
                 gtePayAmount(qPosting, filter.getMinPayAmount()),
                 ltePayAmount(qPosting, filter.getMaxPayAmount()),
                 gteStartTime(qPostingSchedule, filter.getStartTime()),
-                lteEndTime(qPostingSchedule, filter.getEndTime())
+                lteEndTime(qPostingSchedule, filter.getEndTime()),
+                keywordMatches(qPostingKeyword, qPosting, filter.getKeyword())
             )
             .groupBy(qPosting.id, qPosting.payAmount, qPosting.createdAt)
             .orderBy(getOrderSpecifiers(qPosting, filter.getPayAmountSort()))
@@ -585,6 +594,27 @@ private BooleanExpression containsSearchKeyword(QPosting qPosting, QWorkspace qW
             .or(qWorkspace.businessName.containsIgnoreCase(searchKeyword));
     }
 
+    /**
+     * 업종 필터: 입력 텍스트가 (마스터 연결 업종명 OR 직접입력 업종 라벨)에 부분일치.
+     * 직접입력 라벨은 jsonb(custom_keywords)라 text 캐스팅(HQL string → PostgreSQL text) 후 ilike로 매칭한다.
+     * LIKE 와일드카드(%, _)는 '!'로 이스케이프해 마스터 매칭(containsIgnoreCase)과 동일하게 부분일치만 허용한다.
+     */
+    private BooleanExpression keywordMatches(QPostingKeyword qPostingKeyword, QPosting qPosting, String keyword) {
+        if (ObjectUtils.isEmpty(keyword) || keyword.isBlank()) {
+            return null;
+        }
+        BooleanExpression masterMatch = qPostingKeyword.name.containsIgnoreCase(keyword);
+
+        String escaped = keyword
+            .replace("!", "!!")
+            .replace("%", "!%")
+            .replace("_", "!_");
+        BooleanExpression customMatch = Expressions.booleanTemplate(
+            "cast({0} as string) ilike {1} escape '!'", qPosting.customKeywords, "%" + escaped + "%"
+        );
+        return masterMatch.or(customMatch);
+    }
+
     private OrderSpecifier<?>[] getOrderSpecifiersForMapList(QPosting qPosting, PostingSortType sortType) {
         List<OrderSpecifier<?>> orderSpecifiers = new ArrayList<>();
         
diff --git a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/ManagerPostingDetailResponse.java b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/ManagerPostingDetailResponse.java
index 4ac27a5f..83ed7995 100644
--- a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/ManagerPostingDetailResponse.java
+++ b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/ManagerPostingDetailResponse.java
@@ -10,6 +10,7 @@
 
 import java.time.LocalDateTime;
 import java.util.List;
+import java.util.Objects;
 
 @Getter
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
@@ -36,6 +37,8 @@ public class ManagerPostingDetailResponse {
 
     private List<PostingKeyword> postingKeywords;
 
+    private List<String> customKeywords;
+
     private List<PostingSchedule> schedules;
 
     public static ManagerPostingDetailResponse of(
@@ -53,6 +56,7 @@ public static ManagerPostingDetailResponse of(
             posting.getCreatedAt(),
             posting.getUpdatedAt(),
             postingKeywords,
+            Objects.requireNonNullElse(posting.getCustomKeywords(), List.of()),
             posting.getSchedules()
         );
     }
diff --git a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/ManagerPostingListResponse.java b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/ManagerPostingListResponse.java
index 6e24a67e..1d018bad 100644
--- a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/ManagerPostingListResponse.java
+++ b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/ManagerPostingListResponse.java
@@ -10,6 +10,7 @@
 import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 
 @Getter
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
@@ -29,6 +30,8 @@ public class ManagerPostingListResponse {
 
     private List<PostingKeyword> postingKeywords;
 
+    private List<String> customKeywords;
+
     private List<PostingSchedule> schedules;
 
     private Workspace workspace;
@@ -41,7 +44,8 @@ public static ManagerPostingListResponse of(Posting posting, Map<Long, List<Post
             .paymentType(posting.getPaymentType())
             .createdAt(posting.getCreatedAt())
             .schedules(posting.getSchedules())
-            .postingKeywords(keywordsMap.get(posting.getId()))
+            .postingKeywords(keywordsMap.getOrDefault(posting.getId(), List.of()))
+            .customKeywords(Objects.requireNonNullElse(posting.getCustomKeywords(), List.of()))
             .workspace(posting.getWorkspace())
             .build();
     }
diff --git a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/PostingDetailResponse.java b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/PostingDetailResponse.java
index 45d9c51a..5447d6f4 100644
--- a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/PostingDetailResponse.java
+++ b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/PostingDetailResponse.java
@@ -9,6 +9,7 @@
 
 import java.time.LocalDateTime;
 import java.util.List;
+import java.util.Objects;
 
 @Getter
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
@@ -31,6 +32,8 @@ public class PostingDetailResponse {
 
     private List<PostingKeyword> postingKeywords;
 
+    private List<String> customKeywords;
+
     private List<PostingSchedule> schedules;
 
     private boolean scrapped;
@@ -49,6 +52,7 @@ public static PostingDetailResponse of(
             posting.getPaymentType(),
             posting.getCreatedAt(),
             postingKeywords,
+            Objects.requireNonNullElse(posting.getCustomKeywords(), List.of()),
             posting.getSchedules(),
             scrapped
         );
diff --git a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/PostingListResponse.java b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/PostingListResponse.java
index c2424103..1e0296c0 100644
--- a/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/PostingListResponse.java
+++ b/src/main/java/com/dreamteam/alter/adapter/outbound/posting/persistence/readonly/PostingListResponse.java
@@ -10,6 +10,7 @@
 import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 
 @Getter
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
@@ -29,6 +30,8 @@ public class PostingListResponse {
 
     private List<PostingKeyword> postingKeywords;
 
+    private List<String> customKeywords;
+
     private List<PostingSchedule> schedules;
 
     private Workspace workspace;
@@ -43,7 +46,8 @@ public static PostingListResponse of(Posting posting, Map<Long, List<PostingKeyw
             .paymentType(posting.getPaymentType())
             .createdAt(posting.getCreatedAt())
             .schedules(posting.getSchedules())
-            .postingKeywords(keywordsMap.get(posting.getId()))
+            .postingKeywords(keywordsMap.getOrDefault(posting.getId(), List.of()))
+            .customKeywords(Objects.requireNonNullElse(posting.getCustomKeywords(), List.of()))
             .workspace(posting.getWorkspace())
             .scrapped(scrapped)
             .build();
diff --git a/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminCreatePostingKeyword.java b/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminCreatePostingKeyword.java
new file mode 100644
index 00000000..6e597e8c
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminCreatePostingKeyword.java
@@ -0,0 +1,29 @@
+package com.dreamteam.alter.application.posting.usecase;
+
+import com.dreamteam.alter.common.exception.CustomException;
+import com.dreamteam.alter.common.exception.ErrorCode;
+import com.dreamteam.alter.domain.posting.command.AdminCreatePostingKeywordCommand;
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+import com.dreamteam.alter.domain.posting.port.inbound.AdminCreatePostingKeywordUseCase;
+import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service("adminCreatePostingKeyword")
+@RequiredArgsConstructor
+@Transactional
+public class AdminCreatePostingKeyword implements AdminCreatePostingKeywordUseCase {
+
+    private final PostingKeywordRepository postingKeywordRepository;
+
+    @Override
+    public PostingKeyword execute(AdminCreatePostingKeywordCommand command) {
+        if (postingKeywordRepository.existsByName(command.name())) {
+            throw new CustomException(ErrorCode.INVALID_KEYWORD, "이미 존재하는 업종입니다.");
+        }
+
+        PostingKeyword keyword = PostingKeyword.create(command.name(), command.description());
+        return postingKeywordRepository.save(keyword);
+    }
+}
diff --git a/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminDeletePostingKeyword.java b/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminDeletePostingKeyword.java
new file mode 100644
index 00000000..efb59878
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminDeletePostingKeyword.java
@@ -0,0 +1,32 @@
+package com.dreamteam.alter.application.posting.usecase;
+
+import com.dreamteam.alter.common.exception.CustomException;
+import com.dreamteam.alter.common.exception.ErrorCode;
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+import com.dreamteam.alter.domain.posting.port.inbound.AdminDeletePostingKeywordUseCase;
+import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordQueryRepository;
+import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service("adminDeletePostingKeyword")
+@RequiredArgsConstructor
+@Transactional
+public class AdminDeletePostingKeyword implements AdminDeletePostingKeywordUseCase {
+
+    private final PostingKeywordRepository postingKeywordRepository;
+    private final PostingKeywordQueryRepository postingKeywordQueryRepository;
+
+    @Override
+    public void execute(Long id) {
+        PostingKeyword keyword = postingKeywordRepository.findById(id)
+            .orElseThrow(() -> new CustomException(ErrorCode.POSTING_KEYWORDS_NOT_FOUND));
+
+        if (postingKeywordQueryRepository.existsPostingUsingKeyword(id)) {
+            throw new CustomException(ErrorCode.CONFLICT, "공고에서 사용 중인 업종은 삭제할 수 없습니다.");
+        }
+
+        postingKeywordRepository.delete(keyword);
+    }
+}
diff --git a/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminGetPostingKeywordList.java b/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminGetPostingKeywordList.java
new file mode 100644
index 00000000..464cf19f
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminGetPostingKeywordList.java
@@ -0,0 +1,23 @@
+package com.dreamteam.alter.application.posting.usecase;
+
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+import com.dreamteam.alter.domain.posting.port.inbound.AdminGetPostingKeywordListUseCase;
+import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordQueryRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+@Service("adminGetPostingKeywordList")
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+public class AdminGetPostingKeywordList implements AdminGetPostingKeywordListUseCase {
+
+    private final PostingKeywordQueryRepository postingKeywordQueryRepository;
+
+    @Override
+    public List<PostingKeyword> execute() {
+        return postingKeywordQueryRepository.findAll();
+    }
+}
diff --git a/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminUpdatePostingKeyword.java b/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminUpdatePostingKeyword.java
new file mode 100644
index 00000000..5ad913ef
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/application/posting/usecase/AdminUpdatePostingKeyword.java
@@ -0,0 +1,31 @@
+package com.dreamteam.alter.application.posting.usecase;
+
+import com.dreamteam.alter.common.exception.CustomException;
+import com.dreamteam.alter.common.exception.ErrorCode;
+import com.dreamteam.alter.domain.posting.command.AdminUpdatePostingKeywordCommand;
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+import com.dreamteam.alter.domain.posting.port.inbound.AdminUpdatePostingKeywordUseCase;
+import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service("adminUpdatePostingKeyword")
+@RequiredArgsConstructor
+@Transactional
+public class AdminUpdatePostingKeyword implements AdminUpdatePostingKeywordUseCase {
+
+    private final PostingKeywordRepository postingKeywordRepository;
+
+    @Override
+    public void execute(Long id, AdminUpdatePostingKeywordCommand command) {
+        PostingKeyword keyword = postingKeywordRepository.findById(id)
+            .orElseThrow(() -> new CustomException(ErrorCode.POSTING_KEYWORDS_NOT_FOUND));
+
+        if (postingKeywordRepository.existsByNameAndIdNot(command.name(), id)) {
+            throw new CustomException(ErrorCode.INVALID_KEYWORD, "이미 존재하는 업종입니다.");
+        }
+
+        keyword.update(command.name(), command.description());
+    }
+}
diff --git a/src/main/java/com/dreamteam/alter/application/posting/usecase/CreatePosting.java b/src/main/java/com/dreamteam/alter/application/posting/usecase/CreatePosting.java
index d299b006..82336a0c 100644
--- a/src/main/java/com/dreamteam/alter/application/posting/usecase/CreatePosting.java
+++ b/src/main/java/com/dreamteam/alter/application/posting/usecase/CreatePosting.java
@@ -11,7 +11,6 @@
 import com.dreamteam.alter.domain.posting.entity.Posting;
 import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
 import com.dreamteam.alter.domain.posting.port.inbound.CreatePostingUseCase;
-import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordQueryRepository;
 import com.dreamteam.alter.domain.posting.port.outbound.PostingRepository;
 import com.dreamteam.alter.domain.workspace.entity.Workspace;
 import com.dreamteam.alter.domain.workspace.port.outbound.WorkspaceQueryRepository;
@@ -24,15 +23,12 @@
 public class CreatePosting implements CreatePostingUseCase {
 
     private final PostingRepository postingRepository;
-    private final PostingKeywordQueryRepository postingKeywordQueryRepository;
+    private final PostingKeywordResolver postingKeywordResolver;
     private final WorkspaceQueryRepository workspaceQueryRepository;
 
     @Override
     public void execute(CreatePostingRequestDto request) {
-        List<PostingKeyword> postingKeywords = postingKeywordQueryRepository.findByIds(request.getKeywords());
-        if (postingKeywords.size() != request.getKeywords().size()) {
-            throw new CustomException(ErrorCode.INVALID_KEYWORD);
-        }
+        List<PostingKeyword> postingKeywords = postingKeywordResolver.resolveAndValidate(request.getKeywords());
 
         Workspace workspace = workspaceQueryRepository.findById(request.getWorkspaceId())
             .orElseThrow(() -> new CustomException(ErrorCode.WORKSPACE_NOT_FOUND));
diff --git a/src/main/java/com/dreamteam/alter/application/posting/usecase/CreatePostingApplication.java b/src/main/java/com/dreamteam/alter/application/posting/usecase/CreatePostingApplication.java
index b625da98..14246ad1 100644
--- a/src/main/java/com/dreamteam/alter/application/posting/usecase/CreatePostingApplication.java
+++ b/src/main/java/com/dreamteam/alter/application/posting/usecase/CreatePostingApplication.java
@@ -40,7 +40,7 @@ public void execute(AppActor actor, Long postingId, CreatePostingApplicationRequ
                 .orElseThrow(() -> new CustomException(ErrorCode.POSTING_SCHEDULE_NOT_FOUND));
 
         Posting posting = postingSchedule.getPosting();
-        if (PostingStatus.OPEN.equals(posting.getStatus())) {
+        if (!PostingStatus.OPEN.equals(posting.getStatus())) {
             throw new CustomException(ErrorCode.ILLEGAL_ARGUMENT, "모집이 종료된 공고입니다.");
         }
 
diff --git a/src/main/java/com/dreamteam/alter/application/posting/usecase/GetPostingFilterOptions.java b/src/main/java/com/dreamteam/alter/application/posting/usecase/GetPostingFilterOptions.java
index 6ccfbc10..8a0403d1 100644
--- a/src/main/java/com/dreamteam/alter/application/posting/usecase/GetPostingFilterOptions.java
+++ b/src/main/java/com/dreamteam/alter/application/posting/usecase/GetPostingFilterOptions.java
@@ -3,6 +3,7 @@
 import com.dreamteam.alter.adapter.inbound.general.posting.dto.PostingFilterOptionsResponseDto;
 import com.dreamteam.alter.adapter.outbound.posting.persistence.readonly.PostingFilterOptionsResponse;
 import com.dreamteam.alter.domain.posting.port.inbound.GetPostingFilterOptionsUseCase;
+import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordQueryRepository;
 import com.dreamteam.alter.domain.posting.port.outbound.PostingQueryRepository;
 import com.dreamteam.alter.domain.posting.type.PostingSortType;
 import lombok.RequiredArgsConstructor;
@@ -17,6 +18,7 @@
 public class GetPostingFilterOptions implements GetPostingFilterOptionsUseCase {
 
     private final PostingQueryRepository postingQueryRepository;
+    private final PostingKeywordQueryRepository postingKeywordQueryRepository;
 
     @Override
     public PostingFilterOptionsResponseDto execute() {
@@ -26,7 +28,8 @@ public PostingFilterOptionsResponseDto execute() {
             filterOptions.getProvinces(),
             filterOptions.getDistricts(),
             filterOptions.getTowns(),
-            Arrays.asList(PostingSortType.values())
+            Arrays.asList(PostingSortType.values()),
+            postingKeywordQueryRepository.findAll()
         );
     }
 }
diff --git a/src/main/java/com/dreamteam/alter/application/posting/usecase/ManagerUpdatePosting.java b/src/main/java/com/dreamteam/alter/application/posting/usecase/ManagerUpdatePosting.java
index 2cbf2d6f..60bf3ef2 100644
--- a/src/main/java/com/dreamteam/alter/application/posting/usecase/ManagerUpdatePosting.java
+++ b/src/main/java/com/dreamteam/alter/application/posting/usecase/ManagerUpdatePosting.java
@@ -11,7 +11,6 @@
 import com.dreamteam.alter.domain.posting.entity.Posting;
 import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
 import com.dreamteam.alter.domain.posting.port.inbound.ManagerUpdatePostingUseCase;
-import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordQueryRepository;
 import com.dreamteam.alter.domain.posting.port.outbound.PostingQueryRepository;
 import com.dreamteam.alter.domain.user.context.ManagerActor;
 import com.dreamteam.alter.domain.user.entity.ManagerUser;
@@ -24,7 +23,7 @@
 public class ManagerUpdatePosting implements ManagerUpdatePostingUseCase {
 
     private final PostingQueryRepository postingQueryRepository;
-    private final PostingKeywordQueryRepository postingKeywordQueryRepository;
+    private final PostingKeywordResolver postingKeywordResolver;
 
     @Override
     public void execute(Long postingId, UpdatePostingRequestDto request, ManagerActor actor) {
@@ -33,10 +32,7 @@ public void execute(Long postingId, UpdatePostingRequestDto request, ManagerActo
         Posting posting = postingQueryRepository.findByManagerAndId(postingId, managerUser)
             .orElseThrow(() -> new CustomException(ErrorCode.POSTING_NOT_FOUND));
 
-        List<PostingKeyword> postingKeywords = postingKeywordQueryRepository.findByIds(request.getKeywords());
-        if (postingKeywords.size() != request.getKeywords().size()) {
-            throw new CustomException(ErrorCode.INVALID_KEYWORD);
-        }
+        List<PostingKeyword> postingKeywords = postingKeywordResolver.resolveAndValidate(request.getKeywords());
 
         posting.updateContent(
             request.getTitle(),
@@ -44,6 +40,7 @@ public void execute(Long postingId, UpdatePostingRequestDto request, ManagerActo
             request.getPayAmount(),
             request.getPaymentType(),
             postingKeywords,
+            request.getCustomKeywords(),
             request.getCreateSchedules(),
             request.getUpdateSchedules(),
             request.getDeleteScheduleIds()
diff --git a/src/main/java/com/dreamteam/alter/application/posting/usecase/PostingKeywordResolver.java b/src/main/java/com/dreamteam/alter/application/posting/usecase/PostingKeywordResolver.java
new file mode 100644
index 00000000..effc9579
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/application/posting/usecase/PostingKeywordResolver.java
@@ -0,0 +1,36 @@
+package com.dreamteam.alter.application.posting.usecase;
+
+import com.dreamteam.alter.common.exception.CustomException;
+import com.dreamteam.alter.common.exception.ErrorCode;
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+import com.dreamteam.alter.domain.posting.port.outbound.PostingKeywordQueryRepository;
+import lombok.RequiredArgsConstructor;
+import org.apache.commons.lang3.ObjectUtils;
+import org.springframework.stereotype.Component;
+
+import java.util.List;
+
+@Component
+@RequiredArgsConstructor
+public class PostingKeywordResolver {
+
+    private final PostingKeywordQueryRepository postingKeywordQueryRepository;
+
+    /**
+     * 마스터 업종 ID 목록을 조회·검증한다.
+     * 비어 있으면 빈 리스트를 반환하고, 조회 결과 수가 요청 수와 다르면 존재하지 않는 ID가 있는 것으로 보아 예외.
+     * @param keywordIds 마스터 업종 ID 목록 (nullable)
+     * @return 검증된 PostingKeyword 목록
+     */
+    public List<PostingKeyword> resolveAndValidate(List<Long> keywordIds) {
+        if (ObjectUtils.isEmpty(keywordIds)) {
+            return List.of();
+        }
+
+        List<PostingKeyword> keywords = postingKeywordQueryRepository.findByIds(keywordIds);
+        if (keywords.size() != keywordIds.size()) {
+            throw new CustomException(ErrorCode.INVALID_KEYWORD);
+        }
+        return keywords;
+    }
+}
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/command/AdminCreatePostingKeywordCommand.java b/src/main/java/com/dreamteam/alter/domain/posting/command/AdminCreatePostingKeywordCommand.java
new file mode 100644
index 00000000..4cb8dd7e
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/domain/posting/command/AdminCreatePostingKeywordCommand.java
@@ -0,0 +1,6 @@
+package com.dreamteam.alter.domain.posting.command;
+
+public record AdminCreatePostingKeywordCommand(
+    String name,
+    String description
+) {}
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/command/AdminUpdatePostingKeywordCommand.java b/src/main/java/com/dreamteam/alter/domain/posting/command/AdminUpdatePostingKeywordCommand.java
new file mode 100644
index 00000000..6257a424
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/domain/posting/command/AdminUpdatePostingKeywordCommand.java
@@ -0,0 +1,6 @@
+package com.dreamteam.alter.domain.posting.command;
+
+public record AdminUpdatePostingKeywordCommand(
+    String name,
+    String description
+) {}
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/entity/Posting.java b/src/main/java/com/dreamteam/alter/domain/posting/entity/Posting.java
index 0f2bc054..fb2ed53c 100644
--- a/src/main/java/com/dreamteam/alter/domain/posting/entity/Posting.java
+++ b/src/main/java/com/dreamteam/alter/domain/posting/entity/Posting.java
@@ -8,17 +8,20 @@
 import com.dreamteam.alter.domain.posting.type.PaymentType;
 import com.dreamteam.alter.domain.posting.type.PostingStatus;
 import com.dreamteam.alter.domain.workspace.entity.Workspace;
+import com.vladmihalcea.hibernate.type.json.JsonBinaryType;
 
 import java.time.DayOfWeek;
 import java.time.LocalTime;
 import jakarta.persistence.*;
 import lombok.*;
 import org.apache.commons.lang3.ObjectUtils;
+import org.hibernate.annotations.Type;
 import org.springframework.data.annotation.CreatedDate;
 import org.springframework.data.annotation.LastModifiedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 
 import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.List;
 
 @Entity
@@ -70,6 +73,10 @@ public class Posting {
     @OneToMany(mappedBy = "posting", cascade = CascadeType.ALL, orphanRemoval = true)
     private List<PostingKeywordMap> keywords;
 
+    @Type(JsonBinaryType.class)
+    @Column(name = "custom_keywords", columnDefinition = "jsonb")
+    private List<String> customKeywords;
+
     public static Posting create(CreatePostingRequestDto request, Workspace workspace, List<PostingKeyword> postingKeywords) {
         Posting posting = Posting.builder()
             .workspace(workspace)
@@ -85,6 +92,10 @@ public static Posting create(CreatePostingRequestDto request, Workspace workspac
             .map(keyword -> PostingKeywordMap.create(keyword, posting))
             .toList();
 
+        posting.customKeywords = ObjectUtils.isNotEmpty(request.getCustomKeywords())
+            ? new ArrayList<>(request.getCustomKeywords())
+            : new ArrayList<>();
+
         if (ObjectUtils.isNotEmpty(request.getSchedules())) {
             posting.schedules = request.getSchedules()
                 .stream()
@@ -112,6 +123,7 @@ public void updateContent(
         int payAmount,
         PaymentType paymentType,
         List<PostingKeyword> postingKeywords,
+        List<String> customKeywords,
         List<CreatePostingScheduleRequestDto> createSchedules,
         List<UpdatePostingScheduleDto> updateSchedules,
         List<Long> deleteScheduleIds
@@ -120,6 +132,7 @@ public void updateContent(
         this.description = description;
         this.payAmount = payAmount;
         this.paymentType = paymentType;
+        this.customKeywords = ObjectUtils.isNotEmpty(customKeywords) ? new ArrayList<>(customKeywords) : new ArrayList<>();
 
         // 키워드 업데이트
         updateKeyword(postingKeywords);
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/entity/PostingKeyword.java b/src/main/java/com/dreamteam/alter/domain/posting/entity/PostingKeyword.java
index 7ebea4b2..b99e8565 100644
--- a/src/main/java/com/dreamteam/alter/domain/posting/entity/PostingKeyword.java
+++ b/src/main/java/com/dreamteam/alter/domain/posting/entity/PostingKeyword.java
@@ -43,4 +43,9 @@ public static PostingKeyword create(String name, String description) {
             .build();
     }
 
+    public void update(String name, String description) {
+        this.name = name;
+        this.description = description;
+    }
+
 }
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminCreatePostingKeywordUseCase.java b/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminCreatePostingKeywordUseCase.java
new file mode 100644
index 00000000..209c3a2d
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminCreatePostingKeywordUseCase.java
@@ -0,0 +1,9 @@
+package com.dreamteam.alter.domain.posting.port.inbound;
+
+import com.dreamteam.alter.domain.posting.command.AdminCreatePostingKeywordCommand;
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+
+public interface AdminCreatePostingKeywordUseCase {
+
+    PostingKeyword execute(AdminCreatePostingKeywordCommand command);
+}
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminDeletePostingKeywordUseCase.java b/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminDeletePostingKeywordUseCase.java
new file mode 100644
index 00000000..25675e4d
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminDeletePostingKeywordUseCase.java
@@ -0,0 +1,6 @@
+package com.dreamteam.alter.domain.posting.port.inbound;
+
+public interface AdminDeletePostingKeywordUseCase {
+
+    void execute(Long id);
+}
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminGetPostingKeywordListUseCase.java b/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminGetPostingKeywordListUseCase.java
new file mode 100644
index 00000000..bfa42c4d
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminGetPostingKeywordListUseCase.java
@@ -0,0 +1,10 @@
+package com.dreamteam.alter.domain.posting.port.inbound;
+
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+
+import java.util.List;
+
+public interface AdminGetPostingKeywordListUseCase {
+
+    List<PostingKeyword> execute();
+}
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminUpdatePostingKeywordUseCase.java b/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminUpdatePostingKeywordUseCase.java
new file mode 100644
index 00000000..6d635a18
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/domain/posting/port/inbound/AdminUpdatePostingKeywordUseCase.java
@@ -0,0 +1,8 @@
+package com.dreamteam.alter.domain.posting.port.inbound;
+
+import com.dreamteam.alter.domain.posting.command.AdminUpdatePostingKeywordCommand;
+
+public interface AdminUpdatePostingKeywordUseCase {
+
+    void execute(Long id, AdminUpdatePostingKeywordCommand command);
+}
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/port/outbound/PostingKeywordQueryRepository.java b/src/main/java/com/dreamteam/alter/domain/posting/port/outbound/PostingKeywordQueryRepository.java
index 8cec6ec5..ab3b612a 100644
--- a/src/main/java/com/dreamteam/alter/domain/posting/port/outbound/PostingKeywordQueryRepository.java
+++ b/src/main/java/com/dreamteam/alter/domain/posting/port/outbound/PostingKeywordQueryRepository.java
@@ -7,4 +7,5 @@
 public interface PostingKeywordQueryRepository {
     List<PostingKeyword> findByIds(List<Long> keywordIds);
     List<PostingKeyword> findAll();
+    boolean existsPostingUsingKeyword(Long keywordId);
 }
diff --git a/src/main/java/com/dreamteam/alter/domain/posting/port/outbound/PostingKeywordRepository.java b/src/main/java/com/dreamteam/alter/domain/posting/port/outbound/PostingKeywordRepository.java
new file mode 100644
index 00000000..d8d79c56
--- /dev/null
+++ b/src/main/java/com/dreamteam/alter/domain/posting/port/outbound/PostingKeywordRepository.java
@@ -0,0 +1,11 @@
+package com.dreamteam.alter.domain.posting.port.outbound;
+
+import com.dreamteam.alter.domain.posting.entity.PostingKeyword;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PostingKeywordRepository extends JpaRepository<PostingKeyword, Long> {
+
+    boolean existsByName(String name);
+
+    boolean existsByNameAndIdNot(String name, Long id);
+}
diff --git a/src/main/resources/db/migration/V4__add_postings_custom_keywords_column.sql b/src/main/resources/db/migration/V4__add_postings_custom_keywords_column.sql
new file mode 100644
index 00000000..53eac0b0
--- /dev/null
+++ b/src/main/resources/db/migration/V4__add_postings_custom_keywords_column.sql
@@ -0,0 +1,4 @@
+-- 공고 직접입력 업종(라벨) 저장용 jsonb 컬럼 추가.
+-- 마스터(posting_keywords)에 등록하지 않는 자유 입력 업종명 리스트를 공고에 직접 보관한다.
+ALTER TABLE postings
+    ADD COLUMN custom_keywords jsonb;
diff --git a/src/main/resources/db/migration/V5__seed_posting_keywords.sql b/src/main/resources/db/migration/V5__seed_posting_keywords.sql
new file mode 100644
index 00000000..9967395f
--- /dev/null
+++ b/src/main/resources/db/migration/V5__seed_posting_keywords.sql
@@ -0,0 +1,17 @@
+-- 업종/키워드 마스터 초기 시드.
+-- 기존 수동 삽입분과의 충돌을 막기 위해 이름 기준 멱등 처리(ON CONFLICT DO NOTHING).
+-- created_at/updated_at은 NOT NULL이며 기본값이 없어(Flyway는 JPA Auditing 우회) now()를 명시한다.
+INSERT INTO posting_keywords (name, description, created_at, updated_at)
+VALUES
+    ('카페', NULL, now(), now()),
+    ('음식점', NULL, now(), now()),
+    ('주점', NULL, now(), now()),
+    ('편의점', NULL, now(), now()),
+    ('베이커리', NULL, now(), now()),
+    ('패스트푸드', NULL, now(), now()),
+    ('배달', NULL, now(), now()),
+    ('판매/매장', NULL, now(), now()),
+    ('사무보조', NULL, now(), now()),
+    ('물류/포장', NULL, now(), now()),
+    ('기타', NULL, now(), now())
+ON CONFLICT (name) DO NOTHING;