If there was a maximum security prison out in space or on another planet, what type of guard would they recruit to work it?

We don’t have orbiting maximum security prisons or those on other planets like Lunar Max in MIB 3, or in orbit like Star Trek Voyager, at least not yet. Even if space travel became a frequent thing, to be a guard on an off planet facility like that would not be a 9–5 job, it could take hours to get there if one was lucky or days to weeks depending if it was on another planet. Would single people be recruited since they would not have family they would be separated from for extended periods? Would they have to set up whole communities so a guard can bring their family too and have most of the trappings of Earth? How well would they need to be paid to keep them happy pulling a stint that would last weeks, maybe many months in length?