I always thought firefighter life was like Emergency!, although Gage and DeSoto were also paramedics and responded to all kinds of calls. They have to clean the station, maintain equipment, attend training drills, do paperwork, and visit schools and parades.
DH works for the electric company at a computer console in the control room. He describes his work as a lot of sitting, sometimes punching keys and talking on the phone-until there's a blackout, or a Katrina-like disaster, and all eHell breaks out.