As long as he uses the proper technique and doesn't try to show off and lift something he's not really capable of. I only recommended it for his immediate needs and the perks are solid for a part-time job because of the benefits he'd receive through the union.
The current contract the union negotiated for their employees is outstanding. Our delivery guy told me they get $8.00 towards their retirement for every hour they work.
It will be some good job experience and a big name to put on his resume.
EDIT: Yes you should be able to apply online. I know they are currently hiring because they took over a lot of the business DHL gave up on.