), is a retired American naval officer and aviator, test pilot, metallurgical engineer, and former NASA astronaut, and was the first submariner in space.

Following flight training, he served tours of duty in A-4 Skyhawk and A-6 Intruder aircraft, and was selected to attend the Empire Test Pilots' School in Great Britain.

[4] Selected by NASA in May 1984, McCulley completed a one-year training and evaluation program in June 1985, qualifying him for assignment as a pilot on future Space Shuttle flight crews.

During the mission crew members successfully deployed the Galileo spacecraft on its journey to explore Jupiter, operated the Shuttle Solar Backscatter Ultraviolet Instrument (SSBUV) to map atmospheric ozone, and performed numerous secondary experiments involving radiation measurements, polymer morphology, lightning research, microgravity effects on plants, and a student experiment on ice crystal growth in space.

Named to this position on June 1, 1996, he was responsible for directing the integration of all processing activities associated with America's Space Shuttle program.

In this role, he had primary responsibility for the day-to-day operations and overall management of USA, the Prime Contractor for the Space Shuttle program.