He should become a union plumber or electrician, or maybe a cop or fireman.
Any one of those BUT a cop … cops are essentially armed goons in the service of the state. A lot of their job is pushing people around and putting them in cages for victimless crimes. It’s a job that’s (justifiably) disliked, and anyone with half a heart would also grow to hate doing the job after a few years.
Not sure about firemen — they go to less than one fire a day, but they inhale a lot of toxic muck at those fires. Apparently, their life expectancy is 10+ years shorter than average.