diff --git a/docker-compose.yml b/docker-compose.yml
index 5ed4fffa..2aaa66f6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -36,6 +36,11 @@ x-airflow-common:
     AIRFLOW_VAR_MES_AIDES_AIRTABLE_KEY: ${AIRFLOW_VAR_MES_AIDES_AIRTABLE_KEY}
     AIRFLOW_VAR_SOLIGUIDE_API_TOKEN: ${AIRFLOW_VAR_SOLIGUIDE_API_TOKEN}
     AIRFLOW_VAR_TWOCAPTCHA_API_KEY: ${AIRFLOW_VAR_TWOCAPTCHA_API_KEY}
+    AIRFLOW_VAR_DATAWAREHOUSE_DI_HOST: target-db
+    AIRFLOW_VAR_DATAWAREHOUSE_DI_USERNAME: data-inclusion
+    AIRFLOW_VAR_DATAWAREHOUSE_DI_DATABASE: data-inclusion
+    AIRFLOW_VAR_DATAWAREHOUSE_DI_PASSWORD: data-inclusion
+    AIRFLOW_VAR_DATAWAREHOUSE_BUCKET_NAME: data-inclusion-lake
 
   volumes:
     - ./pipeline/dbt:/opt/airflow/dbt
diff --git a/pipeline/dags/backup_datawarehouse.py b/pipeline/dags/backup_datawarehouse.py
new file mode 100644
index 00000000..9d16f6de
--- /dev/null
+++ b/pipeline/dags/backup_datawarehouse.py
@@ -0,0 +1,54 @@
+from datetime import timedelta
+
+from airflow import DAG
+from airflow.models import Variable
+from airflow.operators import empty
+from airflow.operators.bash import BashOperator
+from airflow.providers.amazon.aws.transfers.local_to_s3 import (
+    LocalFilesystemToS3Operator,
+)
+from airflow.utils.dates import days_ago
+
+default_args = {
+    "owner": "airflow",
+    "depends_on_past": False,
+    "email_on_failure": False,
+    "email_on_retry": False,
+    "retries": 1,
+    "retry_delay": timedelta(seconds=5),
+}
+
+with DAG(
+    "backup_datawarehouse_to_s3",
+    default_args=default_args,
+    description="Backup PostgreSQL datawarehouse and upload to S3",
+    schedule_interval="0 2 * * *",
+    start_date=days_ago(1),
+    catchup=False,
+):
+    start = empty.EmptyOperator(task_id="start")
+    end = empty.EmptyOperator(task_id="end")
+    backup_postgres = BashOperator(
+        task_id="backup_postgres",
+        bash_command=f"""
+        pg_dump -h {Variable.get('DATAWAREHOUSE_DI_HOST')} \
+                -U {Variable.get('DATAWAREHOUSE_DI_USER')} \
+                -d {Variable.get('DATAWAREHOUSE_DI_DATABASE')} -F c -f /tmp/backup.dump
+        """,
+        env={"PGPASSWORD": f"{Variable.get('DATAWAREHOUSE_DI_PASSWORD')}"},
+    )
+    logical_date = "{{ ds }}"
+    upload_to_s3 = LocalFilesystemToS3Operator(
+        task_id="upload_to_s3",
+        filename="/tmp/backup.dump",
+        dest_key=f"S3://{Variable.get('DATAWAREHOUSE_BUCKET_NAME')}/data/backups/datawarehouse/backup_{logical_date}.dump",
+        aws_conn_id="s3",
+        replace=True,
+    )
+
+    clean_up = BashOperator(
+        task_id="cleanup",
+        bash_command="rm /tmp/backup.dump",
+    )
+
+    (start >> backup_postgres >> upload_to_s3 >> clean_up >> end)