Jobs/careers without a 4 year degree that ISN'T fast food?

This is for my boyfriend, as I am about to get my BS and then I’ll be going onto get my MS for a career in healthcare.

My boyfriend is a very smart, hard-working individual. Great work ethic but he is a TERRIBLE student and hates, hates, hates the school model. Graduated from high school but had bad grades. He does not have a college degree and doesn’t want to go back to school anyway. He also doesn’t have the money to do so and just doesn’t want to.

He does have work experience in your typical, crappy minimum-wage jobs, but he would like to have a career in the future where he can someday make 30k a year, hopefully with healthcare coverage. That’s it.

He feels that it would be best for him to complete a certificate of some sort for a job, rather than going back to school for 1–2 years. He is in good physical shape but very thin and a little short, which rules him out of being a security guard.

Any idea on what he can do? We are from a big city with a lot of healthcare opportunities but I am not familiar with non-degree type jobs.