diff --git a/src/spaceone/identity/manager/user_manager.py b/src/spaceone/identity/manager/user_manager.py
index affcc215..645ff670 100644
--- a/src/spaceone/identity/manager/user_manager.py
+++ b/src/spaceone/identity/manager/user_manager.py
@@ -11,7 +11,8 @@
 from spaceone.identity.manager.project_manager import ProjectManager
 from spaceone.identity.manager.role_binding_manager import RoleBindingManager
 from spaceone.identity.manager.user_group_manager import UserGroupManager
-from spaceone.identity.manager.workspace_group_manager import WorkspaceGroupManager
+from spaceone.identity.manager.workspace_group_manager import \
+    WorkspaceGroupManager
 from spaceone.identity.model.user.database import User
 
 _LOGGER = logging.getLogger(__name__)
@@ -127,16 +128,24 @@ def delete_user_by_vo(user_vo: User) -> None:
             users.remove(user_vo.user_id)
             project_mgr.update_project_by_vo({"users": users}, project_vo=project_vo)
 
-        # TODO: Delete Workspace Group
+        # Delete workspace groups
         workspace_group_vos = workspace_group_mgr.filter_workspace_groups(
-            users=user_vo.user_id, domain_id=user_vo.domain_id
+            users__user_id=user_vo.user_id, domain_id=user_vo.domain_id
         )
+
         for workspace_group_vo in workspace_group_vos:
-            users = workspace_group_vo.users
-            users.remove(user_vo.user_id)
-            workspace_group_mgr.update_workspace_group_by_vo(
-                {"users": users}, workspace_group_vo=workspace_group_vo
-            )
+            workspace_group_dict = workspace_group_vo.to_mongo().to_dict()
+            users = workspace_group_dict.get("users", [])
+
+            if users:
+                updated_users = [
+                    user for user in users if user.get("user_id") != user_vo.user_id
+                ]
+
+                if len(updated_users) != len(users):
+                    workspace_group_mgr.update_workspace_group_by_vo(
+                        {"users": updated_users}, workspace_group_vo=workspace_group_vo
+                    )
 
         user_vo.delete()
 
diff --git a/src/spaceone/identity/service/user_profile_service.py b/src/spaceone/identity/service/user_profile_service.py
index 63a752c6..61f4f9f2 100644
--- a/src/spaceone/identity/service/user_profile_service.py
+++ b/src/spaceone/identity/service/user_profile_service.py
@@ -16,23 +16,21 @@
 from spaceone.identity.manager.mfa_manager.base import MFAManager
 from spaceone.identity.manager.role_binding_manager import RoleBindingManager
 from spaceone.identity.manager.role_manager import RoleManager
-from spaceone.identity.manager.token_manager.local_token_manager import (
-    LocalTokenManager,
-)
+from spaceone.identity.manager.token_manager.local_token_manager import \
+    LocalTokenManager
 from spaceone.identity.manager.user_manager import UserManager
-from spaceone.identity.manager.workspace_group_manager import WorkspaceGroupManager
+from spaceone.identity.manager.workspace_group_manager import \
+    WorkspaceGroupManager
 from spaceone.identity.manager.workspace_manager import WorkspaceManager
 from spaceone.identity.model.user.database import User
 from spaceone.identity.model.user.response import *
 from spaceone.identity.model.user_profile.request import *
-from spaceone.identity.model.user_profile.request import (
-    UserProfileGetWorkspaceGroupsRequest,
-)
+from spaceone.identity.model.user_profile.request import \
+    UserProfileGetWorkspaceGroupsRequest
 from spaceone.identity.model.user_profile.response import (
-    MyWorkspaceGroupsResponse,
-    MyWorkspacesResponse,
-)
-from spaceone.identity.service.workspace_group_service import WorkspaceGroupService
+    MyWorkspaceGroupsResponse, MyWorkspacesResponse)
+from spaceone.identity.service.workspace_group_service import \
+    WorkspaceGroupService
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -350,41 +348,48 @@ def get_workspaces(
             MyWorkspaceResponse:
         """
 
+        workspace_group_id = params.workspace_group_id
+        user_id = params.user_id
+        domain_id = params.domain_id
+
         role_mgr = RoleManager()
         rb_mgr = RoleBindingManager()
         workspace_mgr = WorkspaceManager()
         allow_all = False
 
-        user_vo = self.user_mgr.get_user(params.user_id, params.domain_id)
+        user_vo = self.user_mgr.get_user(user_id, domain_id)
 
         if user_vo.role_type == "DOMAIN_ADMIN":
             allow_all = True
 
         conditions = {
-            "user_id": params.user_id,
-            "domain_id": params.domain_id,
+            "user_id": user_id,
+            "domain_id": domain_id,
             "role_type": ["WORKSPACE_OWNER", "WORKSPACE_MEMBER"],
         }
 
-        if params.workspace_group_id:
-            conditions["workspace_group_id"] = params.workspace_group_id
+        if workspace_group_id:
+            conditions["workspace_group_id"] = workspace_group_id
 
         rb_vos = rb_mgr.filter_role_bindings(**conditions)
 
+        workspace_filter_conditions = {"domain_id": domain_id, "state": "ENABLED"}
         if allow_all:
+            if workspace_group_id:
+                workspace_filter_conditions["workspace_group_id"] = workspace_group_id
+
             workspace_vos = workspace_mgr.filter_workspaces(
-                domain_id=params.domain_id, state="ENABLED"
+                **workspace_filter_conditions
             )
         else:
             workspace_ids = list(set([rb.workspace_id for rb in rb_vos]))
+            workspace_filter_conditions["workspace_id"] = workspace_ids
             workspace_vos = workspace_mgr.filter_workspaces(
-                workspace_id=workspace_ids,
-                domain_id=params.domain_id,
-                state="ENABLED",
+                **workspace_filter_conditions
             )
 
         role_vos = role_mgr.filter_roles(
-            domain_id=params.domain_id,
+            domain_id=domain_id,
             role_type=["WORKSPACE_OWNER", "WORKSPACE_MEMBER"],
         )