Alan Sheehan

Alan Sheehan was a human male Starfleet officer in the 22nd century.

History
Sheehan during his career served as an engineer aboard the Earth ship Intrepid, probably as an Earth Starfleet officer.

In October, 2162, he was chosen by Captain Malcolm Reed, to be his chief engineer on the USS Pioneer (NCC-63) due to his experience on Intrepid class starships.

In April, 2163, the Pioneer returned to Earth to take aboard a team of engineers led by Doctor Tobin Dax. Sheehan worked closely with Dax, to solve engineering problems caused by the mixture of different Federation member races' technologies. During a trial run the deflector shields interfered with the ship's warp field, creating an unstable wormhole. During the accident Sheehan suffered severe injuries and was in coma for several days.

Once Pioneer escaped the disaster, he was taken to a medical facility. Chief medical officer Doctor Therese Liao belived Sheehan needed months to recover, "and there's no telling when or if he'd be fit for duty again". He was temporarily replaced by Tobin Dax.