Electronics assembly and test, polymer molding, light machining, automatic machine operation. All basic manufacturing stuff.
Your difficulty is finding a good young person is probably a function of a lack of supply. Not very many young folks are aiming to head into that field, so no doubt you're left with those who can't find anything else.
I'm sure I'm not telling you anything you don't already know. Also, this comment isn't meant to insult your profession; I don't know why more young folks don't aspire to that sort of work.