diff --git a/Marco.Pms.Services/Controllers/OrganizationController.cs b/Marco.Pms.Services/Controllers/OrganizationController.cs
index 796e1ee..af98d12 100644
--- a/Marco.Pms.Services/Controllers/OrganizationController.cs
+++ b/Marco.Pms.Services/Controllers/OrganizationController.cs
@@ -12,6 +12,7 @@ using Marco.Pms.Model.ViewModels.Projects;
 using Marco.Pms.Services.Service;
 using MarcoBMS.Services.Helpers;
 using MarcoBMS.Services.Service;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
@@ -21,6 +22,7 @@ namespace Marco.Pms.Services.Controllers
 {
     [Route("api/[controller]")]
     [ApiController]
+    [Authorize]
     public class OrganizationController : ControllerBase
     {
         private readonly IDbContextFactory<ApplicationDbContext> _dbContextFactory;
@@ -109,7 +111,7 @@ namespace Marco.Pms.Services.Controllers
         #region =================================================================== Post Functions ===================================================================
 
         [HttpPost("create")]
-        public async Task<IActionResult> CreateServiceProviderAsync([FromBody] CreateOrganizationDto model)
+        public async Task<IActionResult> CreateOrganizationAsync([FromBody] CreateOrganizationDto model)
         {
             await using var _context = await _dbContextFactory.CreateDbContextAsync();
             using var scope = _serviceScope.CreateScope();
@@ -238,7 +240,7 @@ namespace Marco.Pms.Services.Controllers
         }
 
         [HttpPost("assign/project")]
-        public async Task<IActionResult> AssignServiceProviderToProjectAsync([FromBody] AssignOrganizationDto model)
+        public async Task<IActionResult> AssignOrganizationToProjectAsync([FromBody] AssignOrganizationDto model)
         {
             await using var _context = await _dbContextFactory.CreateDbContextAsync();
             using var scope = _serviceScope.CreateScope();
@@ -426,6 +428,70 @@ namespace Marco.Pms.Services.Controllers
                 return StatusCode(500, ApiResponse<object>.ErrorResponse("Internal error", "An internal exception has been occured", 500));
             }
         }
+
+        [HttpPost("assign/tenant/{organizationId}")]
+        public async Task<IActionResult> AssignOrganizationToTenantAsync(Guid organizationId)
+        {
+            await using var _context = await _dbContextFactory.CreateDbContextAsync();
+            using var scope = _serviceScope.CreateScope();
+            await using var transaction = await _context.Database.BeginTransactionAsync();
+            try
+            {
+                var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
+
+                var serviceProviderTenantMappingTask = Task.Run(async () =>
+                {
+                    await using var context = await _dbContextFactory.CreateDbContextAsync();
+                    return await context.TenantOrgMappings
+                        .FirstOrDefaultAsync(spt => spt.OrganizationId == organizationId && spt.TenantId == tenantId && spt.IsActive);
+                });
+
+                var organizationTask = Task.Run(async () =>
+                {
+                    await using var context = await _dbContextFactory.CreateDbContextAsync();
+                    return await context.Organizations
+                        .FirstOrDefaultAsync(o => o.Id == organizationId);
+                });
+
+                await Task.WhenAll(serviceProviderTenantMappingTask, organizationTask);
+
+                var serviceProviderTenantMapping = serviceProviderTenantMappingTask.Result;
+                var organization = organizationTask.Result;
+
+                if (organization == null)
+                {
+                    return NotFound(ApiResponse<object>.ErrorResponse("Organization not found", "Organization not found in database", 404));
+                }
+
+                if (serviceProviderTenantMapping == null)
+                {
+                    var newServiceProviderTenantMapping = new TenantOrgMapping
+                    {
+                        OrganizationId = organization.Id,
+                        SPRID = organization.SPRID,
+                        AssignedDate = DateTime.UtcNow,
+                        IsActive = true,
+                        TenantId = tenantId
+                    };
+                    _context.TenantOrgMappings.Add(newServiceProviderTenantMapping);
+                    await _context.SaveChangesAsync();
+                }
+                var response = _mapper.Map<BasicOrganizationVm>(organization);
+                return Ok(ApiResponse<object>.SuccessResponse(response, "Organization has been assigned to tenant", 200));
+            }
+            catch (DbUpdateException dbEx)
+            {
+                await transaction.RollbackAsync();
+
+                _logger.LogError(dbEx, "Database Exception has been occured, While assigning the organization to project");
+                return StatusCode(500, ApiResponse<object>.ErrorResponse("Internal error", "An database exception has been occured", 500));
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Exception has been occured, While assigned the organizatio to project");
+                return StatusCode(500, ApiResponse<object>.ErrorResponse("Internal error", "An internal exception has been occured", 500));
+            }
+        }
         #endregion
 
         #region =================================================================== Put Functions ===================================================================