diff --git a/jasmin_services/api/serializers.py b/jasmin_services/api/serializers.py
index 92495dc..9203442 100644
--- a/jasmin_services/api/serializers.py
+++ b/jasmin_services/api/serializers.py
@@ -1,5 +1,7 @@
 """Serializers for the jasmin_services api."""
 
+import logging
+
 import django.contrib.auth
 import django_countries.serializers
 import rest_framework.serializers as rf_serial
@@ -7,6 +9,8 @@
 
 from .. import models
 
+logger = logging.getLogger()
+
 
 class ServiceUserSerializer(rf_serial.HyperlinkedModelSerializer):
     """Basic UserSerializer to provide a link to the full one."""
@@ -27,24 +31,59 @@ class Meta:
         fields = ["id", "user"]
 
 
+class LdapGroupSerializer(rf_serial.Serializer):
+    cn = rf_serial.CharField(source="name")
+    dn = rf_serial.SerializerMethodField()
+    gidNumber = rf_serial.IntegerField()
+
+    @staticmethod
+    def get_dn(obj) -> str:
+        """Build the dn from the name and the base."""
+        return f"cn={obj.name},{obj.base_dn}"
+
+
 class RoleListSerializer(rf_serial.ModelSerializer):
     """Basic list of roles."""
 
     user_count = rf_serial.IntegerField(read_only=True)
+    ldap_groups = rf_serial.SerializerMethodField(read_only=True)
 
     class Meta:
         model = models.Role
-        fields = ["id", "name", "user_count"]
+        fields = ["id", "name", "user_count", "ldap_groups"]
+
+    @staticmethod
+    def _to_group(obj):
+        """Convert behaviours to LDAP Group Objects."""
+        if isinstance(obj, models.behaviours.LdapGroupBehaviour):
+            try:
+                group = obj.get_ldap_group()
+            except django.core.exceptions.ObjectDoesNotExist:
+                logger.error(
+                    "A LDAP group behaviour exists for %s : %s, but it does not exist in LDAP.",
+                    obj.ldap_model,
+                    obj.group_name,
+                )
+            else:
+                return group
+        return None
+
+    def get_ldap_groups(self, obj) -> LdapGroupSerializer(many=True):
+        """Return a list of LDAP groups for the role."""
+        groups = [
+            group for behaviour in obj.behaviours.all() if (group := self._to_group(behaviour))
+        ]
+        return LdapGroupSerializer(groups, many=True).data
 
 
-class RoleSerializer(rf_serial.ModelSerializer):
+class RoleSerializer(RoleListSerializer):
     """Detail of role with holders."""
 
     accesses = AccessSerializer(many=True)
 
     class Meta:
         model = models.Role
-        fields = ["id", "name", "accesses"]
+        fields = ["id", "name", "accesses", "user_count", "ldap_groups"]
 
 
 class CategoryListSerializer(rf_serial.HyperlinkedModelSerializer):
diff --git a/jasmin_services/tests/test_api.py b/jasmin_services/tests/test_api.py
index 3f30af7..cd7aa77 100644
--- a/jasmin_services/tests/test_api.py
+++ b/jasmin_services/tests/test_api.py
@@ -148,7 +148,7 @@ def test_services_detail(self):
                 "url": "http://testserver/api/v1/categories/test_cat1/",
                 "name": "test_cat1",
             },
-            "roles": [{"id": 1, "name": "MANAGER"}],
+            "roles": [{"id": 1, "name": "MANAGER", "ldap_groups": []}],
             "summary": "First test category",
             "description": "This should be a long description.",
             "approver_message": "",
@@ -184,7 +184,7 @@ def test_user(self):
                     "summary": "First test category",
                     "hidden": True,
                 },
-                "role": {"id": 1, "name": "MANAGER"},
+                "role": {"id": 1, "name": "MANAGER", "ldap_groups": []},
                 "granted_at": self.manager_grant.granted_at.astimezone(DJANGO_TZ).strftime(
                     f"%Y-%m-%dT%H:%M:%S.%f{utc_offset}"
                 ),
@@ -207,7 +207,7 @@ def test_user(self):
                     "summary": "Another test category",
                     "hidden": True,
                 },
-                "role": {"id": 2, "name": "DEPUTY"},
+                "role": {"id": 2, "name": "DEPUTY", "ldap_groups": []},
                 "granted_at": self.deputy_grant.granted_at.astimezone(DJANGO_TZ).strftime(
                     f"%Y-%m-%dT%H:%M:%S.%f{utc_offset}"
                 ),
@@ -242,7 +242,7 @@ def test_grants_filter_category(self):
                     "summary": "First test category",
                     "hidden": True,
                 },
-                "role": {"id": 1, "name": "MANAGER"},
+                "role": {"id": 1, "name": "MANAGER", "ldap_groups": []},
                 "granted_at": self.manager_grant.granted_at.astimezone(DJANGO_TZ).strftime(
                     f"%Y-%m-%dT%H:%M:%S.%f{utc_offset}"
                 ),
@@ -277,7 +277,7 @@ def test_grants_filter_service(self):
                     "summary": "Another test category",
                     "hidden": True,
                 },
-                "role": {"id": 2, "name": "DEPUTY"},
+                "role": {"id": 2, "name": "DEPUTY", "ldap_groups": []},
                 "granted_at": self.deputy_grant.granted_at.astimezone(DJANGO_TZ).strftime(
                     f"%Y-%m-%dT%H:%M:%S.%f{utc_offset}"
                 ),
@@ -312,7 +312,7 @@ def test_grants_filter_role(self):
                     "summary": "First test category",
                     "hidden": True,
                 },
-                "role": {"id": 1, "name": "MANAGER"},
+                "role": {"id": 1, "name": "MANAGER", "ldap_groups": []},
                 "granted_at": self.manager_grant.granted_at.astimezone(DJANGO_TZ).strftime(
                     f"%Y-%m-%dT%H:%M:%S.%f{utc_offset}"
                 ),
@@ -415,7 +415,7 @@ def test_category_services_detail(self):
                 "url": "http://testserver/api/v1/categories/test_cat1/",
                 "name": "test_cat1",
             },
-            "roles": [{"id": 1, "name": "MANAGER"}],
+            "roles": [{"id": 1, "name": "MANAGER", "ldap_groups": []}],
             "summary": "First test category",
             "description": "This should be a long description.",
             "approver_message": "",
@@ -440,6 +440,7 @@ def test_service_roles_by_id(self):
             {
                 "id": 1,
                 "name": "MANAGER",
+                "ldap_groups": [],
                 "accesses": [
                     {
                         "id": 1,
@@ -467,6 +468,7 @@ def test_service_roles_by_category_and_name(self):
             {
                 "id": 1,
                 "name": "MANAGER",
+                "ldap_groups": [],
                 "accesses": [
                     {
                         "id": 1,
@@ -544,7 +546,7 @@ def test_grants_list(self):
                     "summary": "First test category",
                     "hidden": True,
                 },
-                "role": {"id": 1, "name": "MANAGER"},
+                "role": {"id": 1, "name": "MANAGER", "ldap_groups": []},
                 "user": {
                     "id": self.user.id,
                     "url": "http://testserver/api/v1/users/testuser/",
@@ -573,7 +575,7 @@ def test_grants_list(self):
                     "summary": "Another test category",
                     "hidden": True,
                 },
-                "role": {"id": 2, "name": "DEPUTY"},
+                "role": {"id": 2, "name": "DEPUTY", "ldap_groups": []},
                 "user": {
                     "id": self.user.id,
                     "url": "http://testserver/api/v1/users/testuser/",
@@ -616,7 +618,7 @@ def test_category_grants_list(self):
                     "summary": "First test category",
                     "hidden": True,
                 },
-                "role": {"id": 1, "name": "MANAGER"},
+                "role": {"id": 1, "name": "MANAGER", "ldap_groups": []},
                 "user": {
                     "id": self.user.id,
                     "url": "http://testserver/api/v1/users/testuser/",
@@ -657,7 +659,7 @@ def test_category_grants_list_different_category(self):
                     "summary": "Another test category",
                     "hidden": True,
                 },
-                "role": {"id": 2, "name": "DEPUTY"},
+                "role": {"id": 2, "name": "DEPUTY", "ldap_groups": []},
                 "user": {
                     "id": self.user.id,
                     "url": "http://testserver/api/v1/users/testuser/",