Hey Chelsey! I'm Justine (one of the mods here) and I'm super excited to hear you're interested in playing in Remains!!
I have a surplus of characters, but before I get into them in detail (since it will probably depend on whether you decide for him to have been in Austin throughout the rising, or if he's relatively/brand new?) I thought I'd likewise put out some feelers regarding the possibility that he could know this girl, Cherry, and her college roommate Mina @ sagacious! Cherry and Mina went to college at Michigan State, so their colleges were rivals, but if your guy ends up being a Michigan native it's possible he could know Cherry (who is indeed a Michigan native) from the past. It's possible it may not work, but I thought I'd put it out there since pre-existing connections are always fun!
If you do decide that he's been in Austin for part of or all of the time post-rising, his education degree could absolutely be put to good use at LBJ Library (the Head of Education position, which is now kind of moot now that the city is transitioning into an actual city, is still unfilled) or at UMCB (which also had an education department for the children who lived at that shelter). I know that the LBJ district is going to reclaim some of the University of Texas classroom buildings, so either way -- new to Austin or not -- he could teach through that as well.
Besides that, I know his gardening skills could be put to good use at the farming zones that will eventually be set up near the Greenbelt. That's a little further down the line in the game, but I'm sure they could always use additional hands!
... Basically there are a lot of possibilities for him, and I'm excited to see him potentially come into the game! Once you have some ideas down about how long he's been around I'd be happy to provide further information and answer any questions you may have! :)