/// <summary>
        /// Get manager list with min level
        /// </summary>
        /// <param name="departmentId"></param>
        /// <param name="minLevel"></param>
        /// <returns></returns>
        /// URL: _vti_bin/Services/Employee/EmployeeService.svc/GetManagerByDepartment/5/4
        public List <EmployeeModel> GetManagerByDepartment(string departmentId, string minLevel)
        {
            try
            {
                List <EmployeeModel> employees = new List <EmployeeModel>();
                var employeePositions          = _employeePositionDAL.GetByMinLevel(double.Parse(minLevel, System.Globalization.CultureInfo.InvariantCulture));
                if (employeePositions != null && employeePositions.Count() > 0)
                {
                    var employeePositionIds = employeePositions.Select(x => x.ID).ToList();
                    var employeeList        = _employeeInfoDAL.GetByUserType(true, StringConstant.EmployeeType.ADUser);

                    ////Filter by min level
                    employeeList = employeeList.Where(x => x.Department == null || (x.EmployeeLevel != null && employeePositionIds.Contains(x.EmployeeLevel.LookupId))).ToList();


                    if (!string.IsNullOrEmpty(departmentId) && Convert.ToInt32(departmentId) > 0)
                    {
                        employeeList = employeeList.Where(x => x.Department == null || (x.Department != null && (x.Department.LookupId == 0 || x.Department.LookupId == Convert.ToInt32(departmentId)))).ToList();
                    }

                    foreach (var item in employeeList)
                    {
                        employees.Add(new EmployeeModel
                        {
                            EmployeeID           = item.EmployeeID,
                            ID                   = item.ID,
                            Department           = LookupItemHelper.ConvertToModel(item.Department),
                            Location             = LookupItemHelper.ConvertToModel(item.FactoryLocation),
                            DepartmentPermission = item.DepartmentPermission,
                            FullName             = item.FullName,
                            EmployeeType         = item.EmployeeType
                        });
                    }
                }
                return(employees);
            }
            catch (Exception ex)
            {
                ULSLogging.Log(new SPDiagnosticsCategory("STADA - Employee Service - GetManagerByDepartment fn",
                                                         TraceSeverity.Unexpected, EventSeverity.Error), TraceSeverity.Unexpected,
                               string.Format(CultureInfo.InvariantCulture, "{0}:{1}", ex.Message, ex.StackTrace));
                return(null);
            }
        }