diff --git a/SPiluSZharu/SPiluSZharu/DataModels/WorkerDataModel.cs b/SPiluSZharu/SPiluSZharu/DataModels/WorkerDataModel.cs
index cf7d468..c8edc85 100644
--- a/SPiluSZharu/SPiluSZharu/DataModels/WorkerDataModel.cs
+++ b/SPiluSZharu/SPiluSZharu/DataModels/WorkerDataModel.cs
@@ -5,11 +5,12 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 
 namespace SPiluSZharuContracts.DataModels;
 
-public class WorkerDataModel(string id, string fio, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+public class WorkerDataModel(string id, string fio, string postId, string phoneNumber, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
 {
     public string Id { get; private set; } = id;
 
@@ -17,6 +18,8 @@ public class WorkerDataModel(string id, string fio, string postId, DateTime birt
 
     public string PostId { get; private set; } = postId;
 
+    public string PhoneNumber { get; private set; } = phoneNumber;
+
     public DateTime BirthDate { get; private set; } = birthDate;
 
     public DateTime EmploymentDate { get; private set; } = employmentDate;
@@ -40,6 +43,12 @@ public class WorkerDataModel(string id, string fio, string postId, DateTime birt
         if (!PostId.IsGuid())
             throw new ValidationException("The value in the field PostId is not a unique identifier");
 
+        if (PhoneNumber.IsEmpty())
+            throw new ValidationException("Field PhoneNumber is empty");
+
+        if (!Regex.IsMatch(PhoneNumber, @"^(8|\+7)(\s|\(|\-)?(\d{3})(\s|\)|\-)?(\d{3})(\s|\-)?(\d{2})(\s|\-)?(\d{2})$"))
+            throw new ValidationException("Field PhoneNumber is not a phone number");
+
         if (BirthDate.Date > DateTime.Now.AddYears(-16).Date)
             throw new ValidationException($"Minors cannot be hired (BirthDate = {BirthDate.ToShortDateString()})");
 
diff --git a/SPiluSZharu/SPiluSZharuTests/DataModelsTests/WorkerDataModelTests.cs b/SPiluSZharu/SPiluSZharuTests/DataModelsTests/WorkerDataModelTests.cs
index 2537ebb..f8aba04 100644
--- a/SPiluSZharu/SPiluSZharuTests/DataModelsTests/WorkerDataModelTests.cs
+++ b/SPiluSZharu/SPiluSZharuTests/DataModelsTests/WorkerDataModelTests.cs
@@ -9,57 +9,73 @@ internal class WorkerDataModelTests
     [Test]
     public void IdIsNullOrEmptyTest()
     {
-        var worker = CreateDataModel(null, "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16), DateTime.Now, false);
+        var worker = CreateDataModel(null, "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
-        worker = CreateDataModel(string.Empty, "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        worker = CreateDataModel(string.Empty, "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-18), DateTime.Now, false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void IdIsNotGuidTest()
     {
-        var worker = CreateDataModel("id", "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16), DateTime.Now, false);
+        var worker = CreateDataModel("id", "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void FIOIsNullOrEmptyTest()
     {
-        var worker = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16), DateTime.Now, false);
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), null, Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
-        worker = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16), DateTime.Now, false);
+        worker = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void PostIdIsNullOrEmptyTest()
     {
-        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, DateTime.Now.AddYears(-16), DateTime.Now, false);
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
-        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, DateTime.Now.AddYears(-16), DateTime.Now, false);
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void PostIdIsNotGuidTest()
     {
-        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", "number", DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", null, DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", string.Empty, DateTime.Now.AddYears(-16), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsIncorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", "777", DateTime.Now.AddYears(-16), DateTime.Now, false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void BirthDateIsNotCorrectTest()
     {
-        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
     }
 
     [Test]
     public void BirthDateAndEmploymentDateIsNotCorrectTest()
     {
-        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16), DateTime.Now.AddYears(-16).AddDays(-1), false);
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now.AddYears(-16).AddDays(-1), false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
-        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16), DateTime.Now.AddYears(-14), false);
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), "number", DateTime.Now.AddYears(-16), DateTime.Now.AddYears(-14), false);
         Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
     }
 
@@ -69,16 +85,18 @@ internal class WorkerDataModelTests
         var workerId = Guid.NewGuid().ToString();
         var fio = "fio";
         var postId = Guid.NewGuid().ToString();
+        var phoneNumber = "+7(777)777-77-77";
         var birthDate = DateTime.Now.AddYears(-16).AddDays(-1);
         var employmentDate = DateTime.Now;
         var isDelete = false;
-        var worker = CreateDataModel(workerId, fio, postId, birthDate, employmentDate, isDelete);
+        var worker = CreateDataModel(workerId, fio, postId, phoneNumber, birthDate, employmentDate, isDelete);
         Assert.That(() => worker.Validate(), Throws.Nothing);
         Assert.Multiple(() =>
         {
             Assert.That(worker.Id, Is.EqualTo(workerId));
             Assert.That(worker.FIO, Is.EqualTo(fio));
             Assert.That(worker.PostId, Is.EqualTo(postId));
+            Assert.That(worker.PhoneNumber, Is.EqualTo(phoneNumber));
             Assert.That(worker.BirthDate, Is.EqualTo(birthDate));
             Assert.That(worker.EmploymentDate, Is.EqualTo(employmentDate));
             Assert.That(worker.IsDeleted, Is.EqualTo(isDelete));
@@ -86,6 +104,6 @@ internal class WorkerDataModelTests
     }
 
 
-    private static WorkerDataModel CreateDataModel(string? id, string? fio, string? postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) =>
-        new(id, fio, postId, birthDate, employmentDate, isDeleted);
+    private static WorkerDataModel CreateDataModel(string? id, string? fio, string? postId, string? phoneNumber, DateTime birthDate, DateTime employmentDate, bool isDeleted) =>
+        new(id, fio, postId, phoneNumber, birthDate, employmentDate, isDeleted);
 }