diff --git a/Hcs.WebApp/BackgroundServices/OperationExecutionService.cs b/Hcs.WebApp/BackgroundServices/OperationExecutionService.cs
index 3dbb888..d5496df 100644
--- a/Hcs.WebApp/BackgroundServices/OperationExecutionService.cs
+++ b/Hcs.WebApp/BackgroundServices/OperationExecutionService.cs
@@ -1,16 +1,41 @@
-namespace Hcs.WebApp.BackgroundServices
+using Hcs.WebApp.Services;
+
+namespace Hcs.WebApp.BackgroundServices
 {
-    public class OperationExecutionService(OperationExecutionState state) : BackgroundService
+    public class OperationExecutionService(OperationExecutionState state, IServiceScopeFactory scopeFactory) : BackgroundService
     {
+        private const int SLEEP_TIME = 30000;
+
         private readonly OperationExecutionState state = state;
+        private readonly IServiceScopeFactory scopeFactory = scopeFactory;
 
         protected override async Task ExecuteAsync(CancellationToken stoppingToken)
         {
+            await InitializeState();
+
+            var scope = scopeFactory.CreateScope();
+            var operationService = scope.ServiceProvider.GetRequiredService<OperationService>();
+
             while (!stoppingToken.IsCancellationRequested)
             {
-                await Task.Delay(10000, stoppingToken);
+                while (state.TryDequeueOperation(out var operation))
+                {
+                    await operationService.SetOperationMessageGuid(operation.Id, Guid.NewGuid().ToString());
+                }
 
-                // TODO
+                await Task.Delay(SLEEP_TIME, stoppingToken);
+            }
+        }
+
+        private async Task InitializeState()
+        {
+            using var scope = scopeFactory.CreateScope();
+            var operationService = scope.ServiceProvider.GetRequiredService<OperationService>();
+
+            var operations = await operationService.GetInitiatedOperations();
+            foreach (var operation in operations)
+            {
+                state.EnqueueOperation(operation);
             }
         }
     }
diff --git a/Hcs.WebApp/Services/OperationService.cs b/Hcs.WebApp/Services/OperationService.cs
index 4cade7f..0503737 100644
--- a/Hcs.WebApp/Services/OperationService.cs
+++ b/Hcs.WebApp/Services/OperationService.cs
@@ -26,5 +26,25 @@ namespace Hcs.WebApp.Services
             await context.SaveChangesAsync();
             return operation;
         }
+
+        public async Task<IEnumerable<Operation>> GetInitiatedOperations()
+        {
+            using var context = factory.CreateDbContext();
+            return await (from operation in context.Operations
+                          where !operation.EndedAt.HasValue && string.IsNullOrEmpty(operation.MessageGuid)
+                          select operation).ToListAsync();
+        }
+
+        public async Task SetOperationMessageGuid(int operationId, string messageGuid)
+        {
+            using var context = factory.CreateDbContext();
+            var operation = await context.Operations.FirstOrDefaultAsync(x => x.Id == operationId);
+            if (operation != null)
+            {
+                operation.MessageGuid = messageGuid;
+
+                await context.SaveChangesAsync();
+            }
+        }
     }
 }