diff --git a/SecuritySystem/SecuritySystemDatabaseImplement/Models/Implementer.cs b/SecuritySystem/SecuritySystemDatabaseImplement/Models/Implementer.cs
index 182ab70..0bb5415 100644
--- a/SecuritySystem/SecuritySystemDatabaseImplement/Models/Implementer.cs
+++ b/SecuritySystem/SecuritySystemDatabaseImplement/Models/Implementer.cs
@@ -2,6 +2,7 @@
 using SecuritySystemContracts.ViewModels;
 using SecuritySystemDataModels.Models;
 using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
 
 namespace SecuritySystemDatabaseImplement.Models
 {
@@ -16,6 +17,8 @@ namespace SecuritySystemDatabaseImplement.Models
         public int Qualification { get; private set; }
         [Required]
         public int WorkExperience { get; private set; }
+        [ForeignKey("ImplementerId")]
+        public virtual List<Order> Orders { get; private set; } = new();
         public static Implementer? Create(ImplementerBindingModel model)
         {
             if (model == null)
diff --git a/SecuritySystem/SecuritySystemDatabaseImplement/Models/Order.cs b/SecuritySystem/SecuritySystemDatabaseImplement/Models/Order.cs
index e870e8b..185b0e1 100644
--- a/SecuritySystem/SecuritySystemDatabaseImplement/Models/Order.cs
+++ b/SecuritySystem/SecuritySystemDatabaseImplement/Models/Order.cs
@@ -25,7 +25,7 @@ namespace SecuritySystemDatabaseImplement.Models
         public DateTime? DateImplement { get; private set; }
         public virtual Secure Secure { get; private set; }
         public virtual Client Client { get; private set; }
-        public virtual Implementer Implementer { get; private set; }
+        public virtual Implementer? Implementer { get; private set; }
         public static Order? Create(OrderBindingModel? model)
         {
             if (model == null)