diff --git a/repositories/hubspot_deals/deal_database_postgres_gateway.py b/repositories/hubspot_deals/deal_database_postgres_gateway.py
index 56accf947..29c1868ec 100644
--- a/repositories/hubspot_deals/deal_database_postgres_gateway.py
+++ b/repositories/hubspot_deals/deal_database_postgres_gateway.py
@@ -8,7 +8,9 @@ upserts from HubSpot's client_booking_reference property.
 
 from typing import Optional
 
-from sqlmodel import Session
+from sqlmodel import Session, select
+
+from backend.app.db.models.hubspot_deal_data import HubspotDealData
 
 
 class DealDatabasePostgresGateway:
@@ -16,7 +18,16 @@ class DealDatabasePostgresGateway:
         self._session = session
 
     def record_job_no(self, deal_id: str, job_no: str) -> None:
-        raise NotImplementedError
+        deal = self._find_deal(deal_id)
+        if deal is None:
+            raise ValueError(f"HubSpot deal {deal_id} not found")
+        deal.job_no = job_no
+        self._session.add(deal)
+        self._session.commit()
 
     def job_no_for_deal(self, deal_id: str) -> Optional[str]:
         raise NotImplementedError
+
+    def _find_deal(self, deal_id: str) -> Optional[HubspotDealData]:
+        statement = select(HubspotDealData).where(HubspotDealData.deal_id == deal_id)
+        return self._session.exec(statement).first()