Also I think that if they insist on having only one controller on the graveyard shift, then they should make it compulsory for the controller to use one of those chairs that the old school railway switch board operators used.
Basically a normal bar chair without the back rest, except it only has one leg in the center of the seat. Quite easy to balance on while awake however should one fall asleep gravity takes over and the person occupying seat is rudely and abruptly awoken by the floor.