@@ -1734,12 +1734,20 @@ def get_job(
 https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs/get
 
 Args:
-job_id (str): Unique job identifier.
+job_id (Union[ \
+ str, \
+ google.cloud.bigquery.job.LoadJob, \
+ google.cloud.bigquery.job.CopyJob, \
+ google.cloud.bigquery.job.ExtractJob, \
+ google.cloud.bigquery.job.QueryJob \
+ ]): Job identifier.
 
 Keyword Arguments:
 project (Optional[str]):
 ID of the project which owns the job (defaults to the client's project).
-location (Optional[str]): Location where the job was run.
+location (Optional[str]):
+Location where the job was run. Ignored if ``job_id`` is a job
+object.
 retry (Optional[google.api_core.retry.Retry]):
 How to retry the RPC.
 timeout (Optional[float]):
@@ -1757,6 +1765,10 @@ def get_job(
 """
 extra_params = {"projection": "full"}
 
+project, location, job_id = _extract_job_reference(
+job_id, project=project, location=location
+)
+
 if project is None:
 project = self.project
 
@@ -1791,12 +1803,20 @@ def cancel_job(
 https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs/cancel
 
 Args:
-job_id (str): Unique job identifier.
+job_id (Union[ \
+ str, \
+ google.cloud.bigquery.job.LoadJob, \
+ google.cloud.bigquery.job.CopyJob, \
+ google.cloud.bigquery.job.ExtractJob, \
+ google.cloud.bigquery.job.QueryJob \
+ ]): Job identifier.
 
 Keyword Arguments:
 project (Optional[str]):
 ID of the project which owns the job (defaults to the client's project).
-location (Optional[str]): Location where the job was run.
+location (Optional[str]):
+Location where the job was run. Ignored if ``job_id`` is a job
+object.
 retry (Optional[google.api_core.retry.Retry]):
 How to retry the RPC.
 timeout (Optional[float]):
@@ -1814,6 +1834,10 @@ def cancel_job(
 """
 extra_params = {"projection": "full"}
 
+project, location, job_id = _extract_job_reference(
+job_id, project=project, location=location
+)
+
 if project is None:
 project = self.project
 
@@ -3518,6 +3542,37 @@ def _item_to_table(iterator, resource):
 return TableListItem(resource)
 
 
+def _extract_job_reference(job, project=None, location=None):
+"""Extract fully-qualified job reference from a job-like object.
+
+Args:
+job_id (Union[ \
+ str, \
+ google.cloud.bigquery.job.LoadJob, \
+ google.cloud.bigquery.job.CopyJob, \
+ google.cloud.bigquery.job.ExtractJob, \
+ google.cloud.bigquery.job.QueryJob \
+ ]): Job identifier.
+project (Optional[str]):
+Project where the job was run. Ignored if ``job_id`` is a job
+object.
+location (Optional[str]):
+Location where the job was run. Ignored if ``job_id`` is a job
+object.
+
+Returns:
+Tuple[str, str, str]: ``(project, location, job_id)``
+"""
+if hasattr(job, "job_id"):
+project = job.project
+job_id = job.job_id
+location = job.location
+else:
+job_id = job
+
+return (project, location, job_id)
+
+
 def _make_job_id(job_id, prefix=None):
 """Construct an ID for a new job.
 

@@ -189,7 +189,9 @@ def test_get_service_account_email(self):
 def _create_bucket(self, bucket_name, location=None):
 storage_client = storage.Client()
 bucket = storage_client.bucket(bucket_name)
-retry_storage_errors(bucket.create)(location=location)
+retry_storage_errors(storage_client.create_bucket)(
+bucket_name, location=location
+)
 self.to_delete.append(bucket)
 
 return bucket
@@ -872,7 +874,7 @@ def test_load_table_from_file_w_explicit_location(self):
 job_id = load_job.job_id
 
 # Can get the job from the EU.
-load_job = client.get_job(job_id, location="EU")
+load_job = client.get_job(load_job)
 self.assertEqual(job_id, load_job.job_id)
 self.assertEqual("EU", load_job.location)
 self.assertTrue(load_job.exists())
@@ -889,7 +891,7 @@ def test_load_table_from_file_w_explicit_location(self):
 
 # Can cancel the job from the EU.
 self.assertTrue(load_job.cancel())
-load_job = client.cancel_job(job_id, location="EU")
+load_job = client.cancel_job(load_job)
 self.assertEqual(job_id, load_job.job_id)
 self.assertEqual("EU", load_job.location)
 
@@ -1204,8 +1206,7 @@ def test_query_w_timeout(self):
 # Even though the query takes >1 second, the call to getQueryResults
 # should succeed.
 self.assertFalse(query_job.done(timeout=1))
-
-Config.CLIENT.cancel_job(query_job.job_id, location=query_job.location)
+self.assertIsNotNone(Config.CLIENT.cancel_job(query_job))
 
 def test_query_w_page_size(self):
 page_size = 45

@@ -2933,31 +2933,30 @@ def test_get_job_miss_w_explict_project(self):
 conn = client._connection = make_connection()
 
 with self.assertRaises(NotFound):
-client.get_job(JOB_ID, project=OTHER_PROJECT, location=self.LOCATION)
+client.get_job(JOB_ID, project=OTHER_PROJECT)
 
 conn.api_request.assert_called_once_with(
 method="GET",
 path="/projects/OTHER_PROJECT/jobs/NONESUCH",
-query_params={"projection": "full", "location": self.LOCATION},
+query_params={"projection": "full"},
 timeout=None,
 )
 
 def test_get_job_miss_w_client_location(self):
 from google.cloud.exceptions import NotFound
 
-OTHER_PROJECT = "OTHER_PROJECT"
 JOB_ID = "NONESUCH"
 creds = _make_credentials()
-client = self._make_one(self.PROJECT, creds, location=self.LOCATION)
+client = self._make_one("client-proj", creds, location="client-loc")
 conn = client._connection = make_connection()
 
 with self.assertRaises(NotFound):
-client.get_job(JOB_ID, project=OTHER_PROJECT)
+client.get_job(JOB_ID)
 
 conn.api_request.assert_called_once_with(
 method="GET",
-path="/projects/OTHER_PROJECT/jobs/NONESUCH",
-query_params={"projection": "full", "location": self.LOCATION},
+path="/projects/client-proj/jobs/NONESUCH",
+query_params={"projection": "full", "location": "client-loc"},
 timeout=None,
 )
 
@@ -2971,7 +2970,11 @@ def test_get_job_hit_w_timeout(self):
 QUERY = "SELECT * from test_dataset:test_table"
 ASYNC_QUERY_DATA = {
 "id": "{}:{}".format(self.PROJECT, JOB_ID),
-"jobReference": {"projectId": self.PROJECT, "jobId": "query_job"},
+"jobReference": {
+"projectId": "resource-proj",
+"jobId": "query_job",
+"location": "us-east1",
+},
 "state": "DONE",
 "configuration": {
 "query": {
@@ -2989,18 +2992,21 @@ def test_get_job_hit_w_timeout(self):
 creds = _make_credentials()
 client = self._make_one(self.PROJECT, creds)
 conn = client._connection = make_connection(ASYNC_QUERY_DATA)
+job_from_resource = QueryJob.from_api_repr(ASYNC_QUERY_DATA, client)
 
-job = client.get_job(JOB_ID, timeout=7.5)
+job = client.get_job(job_from_resource, timeout=7.5)
 
 self.assertIsInstance(job, QueryJob)
 self.assertEqual(job.job_id, JOB_ID)
+self.assertEqual(job.project, "resource-proj")
+self.assertEqual(job.location, "us-east1")
 self.assertEqual(job.create_disposition, CreateDisposition.CREATE_IF_NEEDED)
 self.assertEqual(job.write_disposition, WriteDisposition.WRITE_TRUNCATE)
 
 conn.api_request.assert_called_once_with(
 method="GET",
-path="/projects/PROJECT/jobs/query_job",
-query_params={"projection": "full"},
+path="/projects/resource-proj/jobs/query_job",
+query_params={"projection": "full", "location": "us-east1"},
 timeout=7.5,
 )
 
@@ -3049,25 +3055,32 @@ def test_cancel_job_hit(self):
 QUERY = "SELECT * from test_dataset:test_table"
 QUERY_JOB_RESOURCE = {
 "id": "{}:{}".format(self.PROJECT, JOB_ID),
-"jobReference": {"projectId": self.PROJECT, "jobId": "query_job"},
+"jobReference": {
+"projectId": "job-based-proj",
+"jobId": "query_job",
+"location": "asia-northeast1",
+},
 "state": "RUNNING",
 "configuration": {"query": {"query": QUERY}},
 }
 RESOURCE = {"job": QUERY_JOB_RESOURCE}
 creds = _make_credentials()
 client = self._make_one(self.PROJECT, creds)
 conn = client._connection = make_connection(RESOURCE)
+job_from_resource = QueryJob.from_api_repr(QUERY_JOB_RESOURCE, client)
 
-job = client.cancel_job(JOB_ID)
+job = client.cancel_job(job_from_resource)
 
 self.assertIsInstance(job, QueryJob)
 self.assertEqual(job.job_id, JOB_ID)
+self.assertEqual(job.project, "job-based-proj")
+self.assertEqual(job.location, "asia-northeast1")
 self.assertEqual(job.query, QUERY)
 
 conn.api_request.assert_called_once_with(
 method="POST",
-path="/projects/PROJECT/jobs/query_job/cancel",
-query_params={"projection": "full"},
+path="/projects/job-based-proj/jobs/query_job/cancel",
+query_params={"projection": "full", "location": "asia-northeast1"},
 timeout=None,
 )