Skating officials (referees / refs): Easily distinguishable by their black and white striped shirts, black shorts/pants/bottoms, and roller skates, these officials skate around either inside or outside the track, watching the skaters. Their responsibility is to enforce the rules, ensuring safe, fair gameplay. Referees are the primary officials who call penalties.
Non-skating officials (NSOs): Typically wearing either all black, or all black with a WFTDA-pink shirt, these officials do a wide variety of tasks: timing the game, tracking penalties, timing penalties, keeping score, operating the scoreboard, and tracking lineups. If empowered to do so by the head referee, some NSOs may call penalties related to their positions.
Track crew: Responsible for laying down the track (typically chalking out lines, laying down rope, and then taping over the rope) at the start of the game, and then maintaining the track during the game.
Announcers: Responsible for educating the crowd about derby and giving the fans a play by play. They interact with the referees and game production staff to ensure the game starts and proceeds as scheduled. A tough job, it requires significant rules knowledge and care not to say things that give tactical advice to teams during the game.
Emergency medical technicians (EMTs): Having at least two EMTs, or similarly trained persons, on-premises is required for the game to occur. Often these are volunteers, but some leagues may even pay ambulance companies to have an ambulance and its crew on site during the game. This document will not discuss these people further.
Game production staff: These people take care of everything associated with putting on a full game, from getting out chairs, providing water and snacks for game staff [pro tip: officials love good snacks!], running a ticket booth, selling merchandise, and all the thousand other tasks that need to be done. These are often skaters from the league who aren’t playing in the day’s game. This document will not discuss these people further.