diff --git a/be/Hosts/Auth.Host/src/Win_in.Sfs.Auth.Application.Contracts/Departments/IDepartmentAppService.cs b/be/Hosts/Auth.Host/src/Win_in.Sfs.Auth.Application.Contracts/Departments/IDepartmentAppService.cs
index d97d5d484..0af5cf24d 100644
--- a/be/Hosts/Auth.Host/src/Win_in.Sfs.Auth.Application.Contracts/Departments/IDepartmentAppService.cs
+++ b/be/Hosts/Auth.Host/src/Win_in.Sfs.Auth.Application.Contracts/Departments/IDepartmentAppService.cs
@@ -9,4 +9,5 @@ public interface IDepartmentAppService
 {
     Task<DepartmentDTO> GetByUsernameAsync(string username);
     Task UpdateAsync(DepartmentCreateInput input);
+    Task<DepartmentDTO> GetByUserIdAsync(string userId);
 }
diff --git a/be/Hosts/Auth.Host/src/Win_in.Sfs.Auth.Application/Departments/DepartmentAppService.cs b/be/Hosts/Auth.Host/src/Win_in.Sfs.Auth.Application/Departments/DepartmentAppService.cs
index b75291fc7..f546528a1 100644
--- a/be/Hosts/Auth.Host/src/Win_in.Sfs.Auth.Application/Departments/DepartmentAppService.cs
+++ b/be/Hosts/Auth.Host/src/Win_in.Sfs.Auth.Application/Departments/DepartmentAppService.cs
@@ -49,6 +49,27 @@ public class DepartmentAppService
         var deptDto = await GetByCodeAsync(departmentCode).ConfigureAwait(false);
         return deptDto;
     }
+
+    [AllowAnonymous]
+    [HttpGet("by-userid")]
+    public virtual async Task<DepartmentDTO> GetByUserIdAsync(string userId)
+    {
+        var user = await _identityUserManager.FindByIdAsync(userId).ConfigureAwait(false);
+        if (user == null)
+        {
+            return null;
+        }
+
+        var departmentCode = user.GetDepartmentCode();
+        if (string.IsNullOrEmpty(departmentCode))
+        {
+            return null;
+        }
+
+        var deptDto = await GetByCodeAsync(departmentCode).ConfigureAwait(false);
+        return deptDto;
+    }
+
     [AllowAnonymous]
     [HttpPost("update")]
     public virtual async Task UpdateAsync(DepartmentCreateInput input)