Metro fire is hiring single role Paramedics and EMT's. The EMS system here is basically 100% fire-based. AMR used to be a bigger player, but they have been relegated to a very small role. Four agencies basically run all the 911 EMS out here... Metro Fire, Sac City Fire, Cosumnes Fire, and Folsom Fire. All of the private ambulance companies that do ALS also do backup 911. That call volume is pretty low though.
I believe the shifts are basically 48 on 96 off (2 on 4 off) but I'm not sure about the single role EMS crews as they're much newer to the system. It's very easy to figure out which crews are FF/EMS and which ones are just EMS... the FF/EMS crews use either a Type 1 or a Type 3 ambulance. The Single Role crews use Type 2's, Sprinter-based ambulances.