So I just discovered that I have been working next to the waste of oxygen that raped my best friend several years ago. I work in a manufacturing environment and I know that you can’t fire someone just for being a sex offender unless it directly interferes with work duties (in the US). But despite it being a primarily male workforce he does work with several women who have no idea what he is. He literally followed a woman home, broke into her house, and raped her. Him working here puts every female employee at risk. How is that not an unsafe working environment? How is it at even legal to employ him anywhere where he will have contact with women?
Posting this seperately: OP, you have a right to feel unsafe. Talk with your other coworkers, then go to managment with a safety plan. You probably can’t get this guy fired, but it’s completely reasonable to ask for some sort of safeguards, given he’s a multiple offender. If you need inspiration, look at the sort of practices medical facilities have: multiple people required to be in the room, clear boundaries being set, agreed-upon followup if rules are broken, etc.