diff --git a/scripts/submit_job.py b/scripts/submit_job.py
index 321f85f..656bb66 100755
--- a/scripts/submit_job.py
+++ b/scripts/submit_job.py
@@ -91,16 +91,25 @@ def submit_jcl(job, mvshost="oldcomputernerd.com"):
         print(f"JCL file {subjcl} not found")
         return 1
 
-    subcmd = f"nc -w 5 {mvshost} {RDRPORT} < {subjcl}"
-
     try:
-        result = subprocess.run(subcmd, shell=True, check=True, capture_output=True)
+        # Read the JCL file and send via netcat (same approach as upload_source)
+        with open(subjcl, 'rb') as f:
+            result = subprocess.run(
+                ['nc', '-w', '5', mvshost, str(RDRPORT)],
+                input=f.read(),
+                check=True,
+                capture_output=True
+            )
         print(f"Submitted JCL job: {job}")
         if result.stdout:
             print("JES response:", result.stdout.decode(errors='ignore').strip())
         return 0
     except subprocess.CalledProcessError as e:
         print(f"JCL submission failed: {e}")
+        print("stderr:", e.stderr.decode(errors='ignore'))
+        return 1
+    except FileNotFoundError as e:
+        print(f"Error reading JCL file: {e}")
         return 1
 
 if __name__ == "__main__":