Sully was a member of Starfleet in the 2370s. He was stationed on Ajilon Prime in 2373.

In that year, during the Klingon invasion, Sully was shot in the leg and taken off the line by the medics. An ensign later recounted to Jake Sisko about seeing Sully get shot and wishing he had been shot instead so he wouldn't have to fight. It prompted the ensign to shoot himself in the foot instinctively, thereby removing him from the fighting. (DS9: "Nor the Battle to the Strong")

This character was only mentioned in dialogue.