This is an occupation that I haven't come across before, but of course it does make sense, since if there are mints, there must be people who work at them. But I should point out that the "Occupations by Country" category and the categories under it are kind of an afterthought. I just created "Occupations by Country" as a place to put all the varied categories (with various naming systems) that people had dumped willy nilly into the "Professions" category, where they didn't belong.
So while I have no intention of even looking at what's in the "Occupations by Country" category ever again (because there's only so much antacid my system can take), I would like to see an entry in the main "Occupations" category. If "Moneyers" is the term used for anyone who works in a mint, then that's probably what we should go with. If there are a bunch of terms for people who perform different stages in the process, then maybe we should have an entry like "Minting Occupations", and add "Moneyers" and the other related occupations under that.