New Zealand Law
Have New Zealand Law Questions? Ask a Lawyer Online.
You are in a difficult position because you cannot take private jobs while employed, unless you have consent of the employer. This is treated as a breach of the duty of good faith. I would suggest you offer to pay the money earned on the job to them. You will need to get a lawyer but this doesn't appear to be criminal but a civil claim. If they sued as a civil claim they may get a judgment. But you need to get the full picture to your lawyer to get advice on that.