diff --git a/src/aeros_simulation/service.py b/src/aeros_simulation/service.py
index f5c8c6c..918a26a 100644
--- a/src/aeros_simulation/service.py
+++ b/src/aeros_simulation/service.py
@@ -35,6 +35,20 @@ from .utils import calculate_eaf, stream_large_array
 # client = httpx.AsyncClient(timeout=300.0) # Managed in src.aeros_utils
 active_simulations = {}
 
+async def call_ahm_callback_service(simulation_id: str, job_id: str):
+    from src.config import AHM_BASE_URL, AHM_SIMULATION_CALLBACK_URL
+    url = f"{AHM_BASE_URL}{AHM_SIMULATION_CALLBACK_URL}"
+    payload = {
+        "simulation_id": simulation_id,
+        "job_id": job_id,
+        "status": "completed"
+    }
+    
+    async with httpx.AsyncClient() as client:
+        resp = await client.post(url, json=payload, timeout=10.0)
+        resp.raise_for_status()
+    return True
+
 
 # Get Data Service
 async def get_all(common, current_user):
@@ -439,8 +453,6 @@ async def execute_simulation(*, db_session: DbSession, simulation_id: Optional[U
         )
         file_obj = response.raw
                         
-
-
         await save_simulation_result(
             db_session=db_session, simulation_id=simulation.id, schematic_name=sim_data["SchematicName"], eq_update=eq_update, file_path=file_obj
         )
diff --git a/src/config.py b/src/config.py
index 77cfef0..6bb946d 100644
--- a/src/config.py
+++ b/src/config.py
@@ -106,4 +106,7 @@ ROLE_ID=config('ROLE_ID', default=None)
 SECRET_ID=config('SECRET_ID', default=None)
 AEROS_SECRET_PATH=config('AEROS_SECRET_PATH', default=None)
 
-USE_LICENSE_APP = config("USE_LICENSE_APP", cast=bool, default=True)
\ No newline at end of file
+USE_LICENSE_APP = config("USE_LICENSE_APP", cast=bool, default=True)
+
+AHM_BASE_URL = config("AHM_BASE_URL", default="http://192.168.1.82:8000/ahm")
+AHM_SIMULATION_CALLBACK_URL = config("AHM_SIMULATION_CALLBACK_URL", default="/api/v1/simulations/rbd/callback")
\ No newline at end of file
diff --git a/temporal/activity.py b/temporal/activity.py
index d692901..6cb36e8 100644
--- a/temporal/activity.py
+++ b/temporal/activity.py
@@ -1,11 +1,8 @@
 import asyncio
-import requests
 from temporalio import activity
 import os
 import redis.asyncio as redis
 
-AHM_BASE_URL = os.getenv("AHM_BASE_URL", "http://192.168.1.82:8000/ahm")
-AHM_SIMULATION_CALLBACK_URL = os.getenv("AHM_SIMULATION_CALLBACK_URL", "/api/v1/simulations/rbd/callback")
 REDIS_HOST = os.getenv("REDIS_HOST", "192.168.1.82")
 REDIS_PORT = int(os.getenv("REDIS_PORT", 6379))
 
@@ -94,19 +91,13 @@ async def update_contribution_bulk_mappings_activity(sim_id: str):
 
 @activity.defn
 async def call_callback_ahm(params):
+    from src.aeros_simulation.service import call_ahm_callback_service
     sim_id = params["simulation_id"]
     job_id = params["job_id"]
     
-    url = f"{AHM_BASE_URL}{AHM_SIMULATION_CALLBACK_URL}"
-    payload = {
-        "simulation_id": sim_id,
-        "job_id": job_id,
-        "status" : "completed"
-    }
-    
     try:
-        callback_response = requests.post(url, json=payload, timeout=5)
-        callback_response.raise_for_status()
+        await call_ahm_callback_service(sim_id, job_id)
+        return True
     except Exception as e:
         raise e