Lots of truck companies require you to operate the tail lift or help move around packages in the container.
Not every one of those jobs would be for you, you could end up tweaking your back,and plus then hoping in and out of the cab and up and down the steps, one slip and you could really jar your back.
Though, maybe consider being a driver for a uniform company. thers sorting out and paperwork involved wich you would be good at, and potentially with your experience you could move up into a supervisor role.
Prison guard no. You would be complaining about it here a lot.