Never heard of a "coordinator" position. At Ithaca, there is the sound designer who is responsible for providing sound cues, recorded music, vocal/orchestral reinforcement and the design of the reinforcement
system. The sound engineer manages the sound crew and is responsible for the installation and integrity of the sound
system, following the designer's specs. The
mixer is responsible for the operation of the design. On reinforced shows this means learning the show and knowing pickups and ensuring adequate levels for audibility. Usually on shows that are not reinforced, we do not have a
mixer position. On the larger shows, there may be an assistant sound engineer who may run the
cue software/hardware during the show and assist the engineer with the management of the crew.