When I was still in it, it was 74B. They've changed the number since I left. I think it's like 35C now, I'm not sure. Anyways it was pretty much "computer guy". We trained on everything from running servers and routers to making Access databases.
Hopefully you'll get a security clearance with your MOS. I only have a secret clearance, but I landed this current job in less than two weeks of moving to San Diego (this job started in SD, then went all over the States for a year, then Germany).
I just got a call "How's your clearance?"
"It's still good"
"OK show up on Monday, wear a shirt with a collar."
No interview, no nothing. They just needed someone with clearance.
Psy-Ops should be some pretty crazy shit. Best of luck man.