Generally when you commit a crime, you get convicted, complete your sentence, and then you get all of your rights back unless you’re deemed a risk to the public in which case you may have additional restrictions on your freedom.

Not everyone re-offends. In fact, for many types of crimes, the recidivism rate is fairly low. Your assumption that this person is going to put women at risk is short sighted, especially given the fact that a person is FAR more likely to be sexually assaulted by their own romantic partner than a random person.

The problem with banning someone from any sort of employment where they have contact with the other gender, is that that essentially prevents them from working in any capacity. There are no industries with only a single gender across the entire organization. If they hired only men, it would be considered discriminatory and they could be sued.

It also doesn’t in any way reflect the fact that this person will encounter women everywhere, from the grocery store to the gas station. Work is hardly the only place where people encounter others.