John Mason
From The Stargate Omnipedia
Officer stationed at Stargate Command. Mason was one of a select few personnel authorized to access a Lantean Puddle Jumper while it was located at the S.G.C. inside Cheyenne Mountain.
KEY EPISODE
The Return, Part 1 - While in Dr. Lee's labs, McKay adds himself to the list of personnel (including Mason) who are authorized to access an Atlantis Puddle Jumper.