diff --git a/infrastructure/s3/s3_document_bytes_reader.py b/infrastructure/s3/s3_document_bytes_reader.py
index 930377740..2e0739249 100644
--- a/infrastructure/s3/s3_document_bytes_reader.py
+++ b/infrastructure/s3/s3_document_bytes_reader.py
@@ -16,4 +16,6 @@ class S3DocumentBytesReader:
         self._client = boto_s3_client
 
     def read(self, bucket: str, key: str) -> bytes:
-        raise NotImplementedError
+        response: dict[str, Any] = self._client.get_object(Bucket=bucket, Key=key)
+        body: bytes = response["Body"].read()
+        return body