Most VA facilities, the full performance level for a Police Officer is GS6. As to duties; the facility here is dived into two areas. At the Jefferson Barraks unit, you enforce the traffic laws at the compound and respond to domestic calls at the housing areas. at the John Cocran hospital, you handle traffic on the city streets that run through the property, assualts, thefts, vandalism, etc... just like the local departments. The JC hospital used to be next to a housing project of the same name until it got too dangerous for anyone without SWAT gear and they raized it (didn't really help), so they see some action. Most have Detective squads to deal with the drug cases, etc.. and all have Sgt's, Lt's and the like. You can move up or you can use your federal status for priorty <sp> transfer to another agency. Oh, and one last thing, if your hospital has a psych ward, you will also have to handle any disturbances there as well. From what I understand, this is where most injuries to officers come from as a lot of these guys in the psych ward were in "speciaized" units. Hope this helps and good luck.
Law abiding citizens sleep peacefully in their beds, solely because dedicated men and women stand ready to do violence in their behalf.