diff --git a/SecuritySystem/SecuritySystemBusinessLogic/BusinessLogics/ImplementerLogic.cs b/SecuritySystem/SecuritySystemBusinessLogic/BusinessLogics/ImplementerLogic.cs
new file mode 100644
index 0000000..fd65d9b
--- /dev/null
+++ b/SecuritySystem/SecuritySystemBusinessLogic/BusinessLogics/ImplementerLogic.cs
@@ -0,0 +1,126 @@
+using Microsoft.Extensions.Logging;
+using SecuritySystemContracts.BindingModels;
+using SecuritySystemContracts.BusinessLogicsContracts;
+using SecuritySystemContracts.SearchModels;
+using SecuritySystemContracts.StoragesContracts;
+using SecuritySystemContracts.ViewModels;
+
+namespace SecuritySystemBusinessLogic.BusinessLogics
+{
+    public class ImplementerLogic : IImplementerLogic
+    {
+        private ILogger _logger;
+        private IImplementerStorage _implementerStorage;
+
+        public ImplementerLogic(ILogger<ImplementerLogic> logger, IImplementerStorage implementerStorage)
+        {
+            _logger = logger;
+            _implementerStorage = implementerStorage;
+        }
+
+        public bool Create(ImplementerBindingModel model)
+        {
+            CheckModel(model);
+            if (_implementerStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(ImplementerBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_implementerStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public ImplementerViewModel? ReadElement(ImplementerSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. FIO:{FIO}. Id:{Id}", model.ImplementerFIO, model.Id);
+            var element = _implementerStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public List<ImplementerViewModel>? ReadList(ImplementerSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. FIO:{FIO}. Id:{Id}", model?.ImplementerFIO, model?.Id);
+            var list = model == null ? _implementerStorage.GetFullList() : _implementerStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public bool Update(ImplementerBindingModel model)
+        {
+            CheckModel(model);
+            if (_implementerStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(ImplementerBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (model.WorkExperience < 0)
+            {
+                throw new ArgumentNullException("Опыт работы исполнителя должен быть больше или равен нулю", nameof(model.Password));
+            }
+            if (model.Qualification < 0)
+            {
+                throw new ArgumentNullException("Квалификация исполнителя должна быть больше или равна нулю", nameof(model.Password));
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                throw new ArgumentNullException("Нет пароля исполнителя", nameof(model.Password));
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                throw new ArgumentNullException("Нет пароля исполнителя", nameof(model.Password));
+            }
+            if (string.IsNullOrEmpty(model.ImplementerFIO))
+            {
+                throw new ArgumentNullException("Нет фио клиента", nameof(model.ImplementerFIO));
+            }
+            _logger.LogInformation("ReadElement. FIO:{FIO}. Id:{Id}", model.ImplementerFIO, model.Id);
+            var element = _implementerStorage.GetElement(new ImplementerSearchModel
+            {
+                ImplementerFIO = model.ImplementerFIO
+            });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Сотрудник с таким фио уже есть");
+            }
+        }
+    }
+}