I'm like 99% sure it's on the wiki somewhere, but I (and the rest of the mods) cannot find it for the life of me, so yes, this is a thing! With any profession requiring specific licensing, or even just school degrees, those credentials can follow them to Darrow, though it's up to the player if they run into any trouble on that front (paperwork lost in the shuffle~ or whatnot). Doctors etc. have to pass a skills test, and in Barba's case, he'd have to pass the Darrow bar exam, but wouldn't actually need to go back to school unless you wanted him to have to deal with that.