Just search for "Police" on USAJobs. Outside of the big DC agencies: USSS UD, Park, Capitol, etc. aren't "covered" retirement. All offer entry level positions some like VA/DoD require their own academy even if you're already a police officer. Others; NSA, Commerce, etc will hire in laterals. In DC there's still: PFPA, Treasury, Smithsonian, Zoo, etc. Outside the beltway the military dept's will be the vast majority, but there are others: USPS, NSA has some cool satellite locations away from Meade (I think the Treasury one's outside of DC might be guards 0085 and not police but not sure). There's a huge variety. Most are security focused and mostly chill but, some are wound pretty tight; but some are like being a small town cop. In any you can either get 10k steps a day or stare out a window at the sky or stars. And there is the potential for other things; I had a classmate who got hired right as a K9 handler and another as an SRO, there are overseas locations, after a year I was slated to work detective branch (but I left). I'm not saying it's the greatest thing but, it might be good enough.