CPS is pretty much always hiring. I'd look into Montgomery County and DC (CFSA is surprisingly decent given DC politics.) I'd steer clear of PG CPS, they are a mess and turnover is crazy.
Some of the contracted foster care agencies might have openings, but the pay is typically lower.
I don't have any experience with SA. Sorry.
I'd definitely get licensed in DC. There are a lot of agencies/hospitals/SA programs here.
Good luck!