diff --git a/python/TestHarness/schedulers/RunHPC.py b/python/TestHarness/schedulers/RunHPC.py
index ec0d1baa4844..a925c0ad0a9f 100644
--- a/python/TestHarness/schedulers/RunHPC.py
+++ b/python/TestHarness/schedulers/RunHPC.py
@@ -482,20 +482,14 @@ def submitJob(self, job, hold, lock=True):
             # Write the script
             open(submission_script, 'w').write(script)
 
+            # Path to the hpc submit script, which waits for the file to exist
+            # and then submits it
+            hpc_submit = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'hpc_submit')
+
             # Submission command. Here we have a simple bash loop
             # that will try to wait for the file if it doesn't exist yet
             submission_command = self.getHPCSubmissionCommand()
-            cmd = [f'cd {tester.getTestDir()}',
-                f'FILE="{submission_script}"',
-                    'for i in {1..40}',
-                        'do if [ -e "$FILE" ]',
-                        f'then {self.getHPCSubmissionCommand()} $FILE',
-                                'exit $?',
-                            'else sleep 0.25',
-                        'fi',
-                    'done',
-                    'exit 1']
-            cmd = '; '.join(cmd)
+            cmd = f'{hpc_submit} {submission_command} {submission_script}'
 
             # Do the submission; this is thread safe
             exit_code, result, full_cmd = self.callHPC(self.CallHPCPoolType.submit, cmd, num_retries=5)
diff --git a/python/TestHarness/schedulers/hpc_submit b/python/TestHarness/schedulers/hpc_submit
new file mode 100755
index 000000000000..1e5848359804
--- /dev/null
+++ b/python/TestHarness/schedulers/hpc_submit
@@ -0,0 +1,36 @@
+#!/bin/bash
+# Helper script for RunHPC that attempts to submit a HPC
+# job until success. This is needed in the event that the
+# qsub/slurm script that we wrote from the TestHarness
+# is not immediately readable due to a networked file
+# system on the (possibly) other host we're submitting from.
+
+SUBMIT_COMMAND="$1"
+FILE="$2"
+if [ -z "$SUBMIT_COMMAND" ]; then
+  echo "First argument (submit command) not provided"
+  exit 1
+fi
+if [ -z "$FILE" ]; then
+  echo "Second argument (file) not provided"
+  exit 1
+fi
+COMMAND=("${SUBMIT_COMMAND}" "${FILE}")
+# Try for 10 seconds to find the file
+for i in {1..40}; do
+  if [ -e "$FILE" ]; then
+    failed=
+    "${COMMAND[@]}" || failed=1
+    if [ -n "$failed" ]; then
+      sleep 1
+      "${COMMAND[@]}" "${FILE}"
+      exit $?
+    else
+      exit 0
+    fi
+  else
+    sleep 0.25
+  fi
+done
+echo "Failed to find ${FILE}"
+exit 1