diff --git a/perfmetrics/scripts/testing_on_gke/examples/dlio/parse_logs.py b/perfmetrics/scripts/testing_on_gke/examples/dlio/parse_logs.py
index f8f4fc7a6a..8f43dbedf3 100644
--- a/perfmetrics/scripts/testing_on_gke/examples/dlio/parse_logs.py
+++ b/perfmetrics/scripts/testing_on_gke/examples/dlio/parse_logs.py
@@ -27,7 +27,7 @@
 sys.path.append("../")
 import dlio_workload
 from utils.utils import get_memory, get_cpu, unix_to_timestamp, standard_timestamp, is_mash_installed, get_memory_from_monitoring_api, get_cpu_from_monitoring_api, timestamp_to_epoch
-from utils.parse_logs_common import ensureDir, download_gcs_objects, parseLogParserArguments, SUPPORTED_SCENARIOS
+from utils.parse_logs_common import ensure_directory_exists, download_gcs_objects, parse_arguments, SUPPORTED_SCENARIOS
 
 _LOCAL_LOGS_LOCATION = "../../bin/dlio-logs/logs"
 
@@ -296,8 +296,8 @@ def writeRecordsToCsvOutputFile(output: dict, output_file_path: str):
 
 
 if __name__ == "__main__":
-  args = parseLogParserArguments()
-  ensureDir(_LOCAL_LOGS_LOCATION)
+  args = parse_arguments()
+  ensure_directory_exists(_LOCAL_LOGS_LOCATION)
 
   dlioWorkloads = dlio_workload.ParseTestConfigForDlioWorkloads(
       args.workload_config
@@ -313,7 +313,7 @@ def writeRecordsToCsvOutputFile(output: dict, output_file_path: str):
   output_file_path = args.output_file
   # Create the parent directory of output_file_path if doesn't
   # exist already.
-  ensureDir(os.path.dirname(output_file_path))
+  ensure_directory_exists(os.path.dirname(output_file_path))
   writeRecordsToCsvOutputFile(output, output_file_path)
   print(
       "\n\nSuccessfully published outputs of DLIO test runs to"
diff --git a/perfmetrics/scripts/testing_on_gke/examples/dlio/run_tests.py b/perfmetrics/scripts/testing_on_gke/examples/dlio/run_tests.py
index 2fc859782f..7be36bcdb5 100644
--- a/perfmetrics/scripts/testing_on_gke/examples/dlio/run_tests.py
+++ b/perfmetrics/scripts/testing_on_gke/examples/dlio/run_tests.py
@@ -30,7 +30,7 @@
 
 # local imports from other directories
 sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'utils'))
-from run_tests_common import escape_commas_in_string, parse_args, run_command
+from run_tests_common import escape_commas_in_string, parse_args, run_command, add_iam_role_for_buckets
 
 # local imports from same directory
 import dlio_workload
@@ -79,6 +79,16 @@ def main(args) -> None:
       args.instance_id,
       args.machine_type,
   )
+  buckets = [dlioWorkload.bucket for dlioWorkload in dlioWorkloads]
+  role = 'roles/storage.objectUser'
+  add_iam_role_for_buckets(
+      buckets,
+      role,
+      args.project_id,
+      args.project_number,
+      args.namespace,
+      args.ksa,
+  )
   for helmInstallCommand in helmInstallCommands:
     print(f'{helmInstallCommand}')
     if not args.dry_run:
diff --git a/perfmetrics/scripts/testing_on_gke/examples/fio/parse_logs.py b/perfmetrics/scripts/testing_on_gke/examples/fio/parse_logs.py
index fc4ee31562..7d5b5f2074 100644
--- a/perfmetrics/scripts/testing_on_gke/examples/fio/parse_logs.py
+++ b/perfmetrics/scripts/testing_on_gke/examples/fio/parse_logs.py
@@ -27,7 +27,7 @@
 sys.path.append("../")
 import fio_workload
 from utils.utils import get_memory, get_cpu, unix_to_timestamp, is_mash_installed, get_memory_from_monitoring_api, get_cpu_from_monitoring_api
-from utils.parse_logs_common import ensureDir, download_gcs_objects, parseLogParserArguments, SUPPORTED_SCENARIOS
+from utils.parse_logs_common import ensure_directory_exists, download_gcs_objects, parse_arguments, SUPPORTED_SCENARIOS
 
 _LOCAL_LOGS_LOCATION = "../../bin/fio-logs"
 
@@ -73,7 +73,7 @@ def downloadFioOutputs(fioWorkloads: set, instanceId: str) -> int:
     dstDir = (
         _LOCAL_LOGS_LOCATION + "/" + instanceId + "/" + fioWorkload.fileSize
     )
-    ensureDir(dstDir)
+    ensure_directory_exists(dstDir)
 
     srcObjects = f"gs://{fioWorkload.bucket}/fio-output/{instanceId}/*"
     print(f"Downloading FIO outputs from {srcObjects} ...")
@@ -323,8 +323,8 @@ def writeRecordsToCsvOutputFile(output: dict, output_file_path: str):
 
 
 if __name__ == "__main__":
-  args = parseLogParserArguments()
-  ensureDir(_LOCAL_LOGS_LOCATION)
+  args = parse_arguments()
+  ensure_directory_exists(_LOCAL_LOGS_LOCATION)
 
   fioWorkloads = fio_workload.ParseTestConfigForFioWorkloads(
       args.workload_config
@@ -340,7 +340,7 @@ def writeRecordsToCsvOutputFile(output: dict, output_file_path: str):
   output_file_path = args.output_file
   # Create the parent directory of output_file_path if doesn't
   # exist already.
-  ensureDir(os.path.dirname(output_file_path))
+  ensure_directory_exists(os.path.dirname(output_file_path))
   writeRecordsToCsvOutputFile(output, output_file_path)
   print(
       "\n\nSuccessfully published outputs of FIO test runs to"
diff --git a/perfmetrics/scripts/testing_on_gke/examples/fio/run_tests.py b/perfmetrics/scripts/testing_on_gke/examples/fio/run_tests.py
index 0d946d80ab..599852ae78 100644
--- a/perfmetrics/scripts/testing_on_gke/examples/fio/run_tests.py
+++ b/perfmetrics/scripts/testing_on_gke/examples/fio/run_tests.py
@@ -29,7 +29,7 @@
 
 # local imports from other directories
 sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'utils'))
-from run_tests_common import escape_commas_in_string, parse_args, run_command
+from run_tests_common import escape_commas_in_string, parse_args, run_command, add_iam_role_for_buckets
 
 # local imports from same directory
 import fio_workload
@@ -80,6 +80,16 @@ def main(args) -> None:
       args.instance_id,
       args.machine_type,
   )
+  buckets = (fioWorkload.bucket for fioWorkload in fioWorkloads)
+  role = 'roles/storage.objectUser'
+  add_iam_role_for_buckets(
+      buckets,
+      role,
+      args.project_id,
+      args.project_number,
+      args.namespace,
+      args.ksa,
+  )
   for helmInstallCommand in helmInstallCommands:
     print(f'{helmInstallCommand}')
     if not args.dry_run:
@@ -88,4 +98,4 @@ def main(args) -> None:
 
 if __name__ == '__main__':
   args = parse_args()
-main(args)
+  main(args)
diff --git a/perfmetrics/scripts/testing_on_gke/examples/run-gke-tests.sh b/perfmetrics/scripts/testing_on_gke/examples/run-gke-tests.sh
index fde7f4e3f6..29157f1e02 100755
--- a/perfmetrics/scripts/testing_on_gke/examples/run-gke-tests.sh
+++ b/perfmetrics/scripts/testing_on_gke/examples/run-gke-tests.sh
@@ -433,15 +433,6 @@ function createKubernetesServiceAccountForCluster() {
   kubectl config view --minify | grep namespace:
 }
 
-function addGCSAccessPermissions() {
-  test -f "${workload_config}"
-  grep -wh '\"bucket\"' "${workload_config}" | cut -d: -f2 | cut -d, -f1 | cut -d \" -f2 | sort | uniq | grep -v ' ' | while read workload_bucket; do
-    gcloud storage buckets add-iam-policy-binding gs://${workload_bucket} \
-      --member "principal://iam.googleapis.com/projects/${project_number}/locations/global/workloadIdentityPools/${project_id}.svc.id.goog/subject/ns/${appnamespace}/sa/${ksa}" \
-      --role "roles/storage.objectUser"
-  done
-}
-
 function ensureGcsfuseCode() {
   echo "Ensuring we have gcsfuse code ..."
   # clone gcsfuse code if needed
@@ -519,12 +510,12 @@ function deleteAllPods() {
 
 function deployAllFioHelmCharts() {
   echo "Deploying all fio helm charts ..."
-  cd "${gke_testing_dir}"/examples/fio && python3 ./run_tests.py --workload-config "${workload_config}" --instance-id ${instance_id} --machine-type="${machine_type}" && cd -
+  cd "${gke_testing_dir}"/examples/fio && python3 ./run_tests.py --workload-config "${workload_config}" --instance-id ${instance_id} --machine-type="${machine_type}" --project-id=${project_id} --project-number=${project_number} --namespace=${appnamespace} --ksa=${ksa} && cd -
 }
 
 function deployAllDlioHelmCharts() {
   echo "Deploying all dlio helm charts ..."
-  cd "${gke_testing_dir}"/examples/dlio && python3 ./run_tests.py --workload-config "${workload_config}" --instance-id ${instance_id} --machine-type="${machine_type}" && cd -
+  cd "${gke_testing_dir}"/examples/dlio && python3 ./run_tests.py --workload-config "${workload_config}" --instance-id ${instance_id} --machine-type="${machine_type}" --project-id=${project_id} --project-number=${project_number} --namespace=${appnamespace} --ksa=${ksa} && cd -
 }
 
 function listAllHelmCharts() {
@@ -620,7 +611,6 @@ createKubernetesServiceAccountForCluster
 ensureGcsfuseCode
 
 # GCP/GKE configuration dependent on GCSFuse/CSI driver source code
-addGCSAccessPermissions
 createCustomCsiDriverIfNeeded
 
 # Run latest workload configuration
diff --git a/perfmetrics/scripts/testing_on_gke/examples/utils/parse_logs_common.py b/perfmetrics/scripts/testing_on_gke/examples/utils/parse_logs_common.py
index 90a65e6a6a..936efc9da7 100644
--- a/perfmetrics/scripts/testing_on_gke/examples/utils/parse_logs_common.py
+++ b/perfmetrics/scripts/testing_on_gke/examples/utils/parse_logs_common.py
@@ -28,7 +28,7 @@
 ]
 
 
-def ensureDir(dirpath: str):
+def ensure_directory_exists(dirpath: str):
   try:
     os.makedirs(dirpath)
   except FileExistsError:
@@ -55,7 +55,7 @@ def download_gcs_objects(src: str, dst: str) -> Tuple[int, str]:
   return result.returncode, ""
 
 
-def parseLogParserArguments() -> object:
+def parse_arguments() -> object:
   parser = argparse.ArgumentParser(
       prog="DLIO Unet3d test output parser",
       description=(
diff --git a/perfmetrics/scripts/testing_on_gke/examples/utils/run_tests_common.py b/perfmetrics/scripts/testing_on_gke/examples/utils/run_tests_common.py
index 8317ec587e..f207bb1ca2 100644
--- a/perfmetrics/scripts/testing_on_gke/examples/utils/run_tests_common.py
+++ b/perfmetrics/scripts/testing_on_gke/examples/utils/run_tests_common.py
@@ -70,6 +70,33 @@ def parse_args():
       help='Machine-type of the GCE VM or GKE cluster node e.g. n2-standard-32',
       required=True,
   )
+  parser.add_argument(
+      '--project-id',
+      metavar='project-id of the user gke cluster',
+      help='project-id of the user gke cluster e.g. gcs-fuse-test',
+      required=True,
+  )
+  parser.add_argument(
+      '--project-number',
+      metavar='project-number of the user gke cluster',
+      help='project-number of the user gke cluster e.g. 927584127901',
+      required=True,
+      type=int,
+  )
+  parser.add_argument(
+      '--namespace',
+      metavar='kubectl namespace of the user',
+      help='kubectl namespace of the user e.g. default',
+      required=False,
+      default='default',
+  )
+  parser.add_argument(
+      '--ksa',
+      metavar='kubernetes service account of the user',
+      help='kubernetes service account of the user e.g. default',
+      required=False,
+      default='default',
+  )
   parser.add_argument(
       '-n',
       '--dry-run',
@@ -84,6 +111,9 @@ def parse_args():
   for argument in [
       'instance_id',
       'machine_type',
+      'project_id',
+      'namespace',
+      'ksa',
   ]:
     value = getattr(args, argument)
     if not value.strip():
@@ -98,3 +128,29 @@ def parse_args():
       )
 
   return args
+
+
+def add_iam_role_for_buckets(
+    buckets: set,
+    role: str,
+    project_id: str,
+    project_number: str,
+    namespace: str,
+    ksa: str,
+):
+  print(
+      f'Adding role {role} to all the relevant buckets to'
+      f' ksa={ksa} in namespace={namespace} ...\n\n'
+  )
+  for bucket in buckets:
+    command = (
+        f'gcloud storage buckets add-iam-policy-binding gs://{bucket} --member'
+        f' principal://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{project_id}.svc.id.goog/subject/ns/{namespace}/sa/{ksa} --role'
+        f' {role}'
+    )
+    print(command)
+    ret = run_command(command)
+    if ret != 0:
+      raise Exception(
+          f'Failed to add role {role} for {bucket}: exit-code={ret}'
+      )