Only 5.3% of US welders are women. After years as a professor, I became one

I once met a welder who was told upon entering the field, “You’re going to meet a lot of serial killers in this line of work.” He thought his boss was just messing with him, but it turned out to be prophetic. He met something like 5 convicted serial killers in 20 years as a welder. Welding is solitary work that is itinerant. Some of the stories that guy told me would turn your stomach. Anyway— totally off topic, but I thought it was interesting.

I don't know about serial killers, normally they are in prison if known. But felons, yes definitely. A criminal record is not disqualifying in most trades and unions.