diff --git a/src/controllers/customer-controller.ts b/src/controllers/customer-controller.ts
index d4025ca..ef7b634 100644
--- a/src/controllers/customer-controller.ts
+++ b/src/controllers/customer-controller.ts
@@ -147,26 +147,29 @@ export class CustomerController extends Controller {
   @Get("{customerId}")
   @Security("keycloak")
   async getById(@Path() customerId: string) {
-    const record = await prisma.customer.findFirst({
-      include: {
-        branch: {
-          include: {
-            province: true,
-            district: true,
-            subDistrict: true,
+    const [record, countEmployee] = await prisma.$transaction([
+      prisma.customer.findFirst({
+        include: {
+          branch: {
+            include: {
+              province: true,
+              district: true,
+              subDistrict: true,
+            },
+            orderBy: { createdAt: "asc" },
           },
-          orderBy: { createdAt: "asc" },
+          createdBy: true,
+          updatedBy: true,
         },
-        createdBy: true,
-        updatedBy: true,
-      },
-      where: { id: customerId },
-    });
+        where: { id: customerId },
+      }),
+      prisma.employee.count({ where: { customerBranch: { customerId } } }),
+    ]);
 
     if (!record) {
       throw new HttpError(HttpStatus.NOT_FOUND, "Customer cannot be found.", "customerNotFound");
     }
-    return record;
+    return Object.assign(record, { _count: { employee: countEmployee } });
   }
 
   @Post()