diff --git a/backend/hubspot_trigger_orchestrator/handler.py b/backend/hubspot_trigger_orchestrator/handler.py
new file mode 100644
index 00000000..1f83ed80
--- /dev/null
+++ b/backend/hubspot_trigger_orchestrator/handler.py
@@ -0,0 +1,61 @@
+import json
+from typing import Any, Dict, Mapping, Optional
+
+from backend.app.db.models.organisation import HubspotDealData
+from backend.hubspot_trigger_orchestrator.hubspot_deal_differ import HubspotDealDiffer
+from backend.hubspot_trigger_orchestrator.hubspot_trigger_orchestrator_trigger_request import (
+    HubspotTriggerOrchestratorTriggerRequest,
+)
+from backend.utils.subtasks import task_handler
+from etl.hubspot.hubspotClient import HubspotClient
+from etl.hubspot.hubspotDataTodB import HubspotDataToDb
+from utils.logger import setup_logger
+
+logger = setup_logger()
+
+
+@task_handler()
+def handler(event: Mapping[str, Any], context: Any) -> None:
+
+    db_client = HubspotDataToDb()
+    hubspot_client = HubspotClient()
+
+    for record in event.get("Records", []):
+        body_dict = json.loads(record["body"])
+
+        logger.debug("Validating request body")
+        payload = HubspotTriggerOrchestratorTriggerRequest.model_validate(body_dict)
+        logger.debug("Successfully validated request body")
+
+        hubspot_deal_id: str = payload.hubspot_deal_id
+
+        db_deal: Optional[HubspotDealData] = db_client.find_deal_with_deal_id(
+            hubspot_deal_id
+        )
+        if not db_deal:
+            # new hubspot deal, no diffing to do
+            # TODO: trigger hubspot to db ETL
+            return
+
+        hubspot_deal: Dict[str, str]
+        company: Optional[str]
+        listing: Optional[dict[str, str]]
+
+        hubspot_deal, company, listing = hubspot_client.get_deal_info_for_db(
+            hubspot_deal_id
+        )
+
+        if HubspotDealDiffer.check_for_pashub_trigger(
+            new_deal=hubspot_deal, old_deal=db_deal
+        ):
+            # TODO: trigger pashub file fetcher
+            return
+
+        if HubspotDealDiffer.check_for_db_update_trigger(
+            new_deal=hubspot_deal,
+            new_company=company,
+            new_listing=listing,
+            old_deal=db_deal,
+        ):
+            # TODO: trigger db upsert
+            return
diff --git a/backend/hubspot_trigger_orchestrator/hubspot_deal_differ.py b/backend/hubspot_trigger_orchestrator/hubspot_deal_differ.py
new file mode 100644
index 00000000..9d66c637
--- /dev/null
+++ b/backend/hubspot_trigger_orchestrator/hubspot_deal_differ.py
@@ -0,0 +1,21 @@
+from typing import Dict, Optional
+
+from backend.app.db.models.organisation import HubspotDealData
+
+
+class HubspotDealDiffer:
+
+    @staticmethod
+    def check_for_pashub_trigger(
+        new_deal: Dict[str, str], old_deal: HubspotDealData
+    ) -> bool:
+        raise NotImplementedError
+
+    @staticmethod
+    def check_for_db_update_trigger(
+        new_deal: Dict[str, str],
+        new_company: Optional[str],
+        new_listing: Optional[Dict[str, str]],
+        old_deal: HubspotDealData,
+    ) -> bool:
+        raise NotImplementedError
diff --git a/backend/hubspot_trigger_orchestrator/hubspot_trigger_orchestrator_trigger_request.py b/backend/hubspot_trigger_orchestrator/hubspot_trigger_orchestrator_trigger_request.py
new file mode 100644
index 00000000..1adfa07c
--- /dev/null
+++ b/backend/hubspot_trigger_orchestrator/hubspot_trigger_orchestrator_trigger_request.py
@@ -0,0 +1,5 @@
+from pydantic import BaseModel
+
+
+class HubspotTriggerOrchestratorTriggerRequest(BaseModel):
+    hubspot_deal_id: str
diff --git a/etl/hubspot/hubspotDataTodB.py b/etl/hubspot/hubspotDataTodB.py
index 6325efc2..36167bf0 100644
--- a/etl/hubspot/hubspotDataTodB.py
+++ b/etl/hubspot/hubspotDataTodB.py
@@ -74,7 +74,7 @@ class HubspotDataToDb:
                 .all()
             )
 
-    def find_deal_with_deal_id(self, deal_id):
+    def find_deal_with_deal_id(self, deal_id: str) -> Optional[HubspotDealData]:
         with db_read_session() as session:
             return (
                 session.query(HubspotDealData)
@@ -477,7 +477,9 @@ class HubspotDataToDb:
                     dealname=deal_data.get("dealname"),
                     dealstage=deal_data.get("dealstage"),
                     listing_id=listing.get("listing_id", None) if listing else None,
-                    landlord_property_id=listing.get("owner_property_id") if listing else None,
+                    landlord_property_id=(
+                        listing.get("owner_property_id") if listing else None
+                    ),
                     uprn=listing.get("national_uprn") if listing else None,
                     outcome=deal_data.get("outcome"),
                     outcome_notes=deal_data.get("outcome_notes"),
diff --git a/etl/hubspot/scripts/scraper/main.py b/etl/hubspot/scripts/scraper/main.py
index 4f71c6d0..a003ad28 100644
--- a/etl/hubspot/scripts/scraper/main.py
+++ b/etl/hubspot/scripts/scraper/main.py
@@ -16,9 +16,9 @@ def handler(body: dict[str, Any], context: Any) -> None:
 
     hubspot: HubspotClient = HubspotClient()
     dbloader: HubspotDataToDb = HubspotDataToDb()
-    deal = dbloader.find_deal_with_deal_id(hubspot_deal_id)
-    if deal:
-        dbloader.update_deal_with_checks(deal, hubspot)
+    db_deal = dbloader.find_deal_with_deal_id(hubspot_deal_id)
+    if db_deal:
+        dbloader.update_deal_with_checks(db_deal, hubspot)
     else:
-        deal, company, listing = hubspot.get_deal_info_for_db(hubspot_deal_id)
-        dbloader.upsert_deal(deal, company, listing, hubspot)
+        hubspot_deal, company, listing = hubspot.get_deal_info_for_db(hubspot_deal_id)
+        dbloader.upsert_deal(hubspot_deal, company, listing, hubspot)