Spotter / Switcher / Hostler
In my experiences from the AF side, all the hostlers have been multi-purpose type workers. Back when I was the only one setting up for inbound I was still a dockworker but since I was the only hostler on duty I did that most of the time. When we weren't that busy or had several there I'd go up and break a trailer. Of course at AF we didn't have hostlers hooking linehaul sets as the Viking system had set up.
At many of the night time hubs like when I ran Des Moines (DSM) there would be road drivers helping hostlers out during the peak times, one of our city drivers in Kansas City (KCY) bid a hostling spot.
roog