Military Moonshiner–Extremely common in the Exploration Service, where figuring out what you can make alcohol out of safely is one of the job requirements. Otherwise, it’s not that common because most of the military forces provide alcohol (and good alcohol) as a part of the rations, at minimum in the form of a ration round for dinner at base. The wonders of modern nanotechnology means that you can quickly switch from “drunk” to “sober” in only seconds, so even if you’re completely drunk you can get back onto duty immediately.