I'm on long term disability now.my company is unionized. Do they have to take me back and give me a job I can do.

Technically your company must protect your job while you're on disability, but there are other considerations. You should chat with your union as they can advise you what your rights are in reference to your collective agreement. If you have any issues now or in the future with your LTD claim, please feel free to reach out to us for a free consultation.