What is the full name of the chief engineer on the original USS Enterprise?

The full name of the chief engineer on the original USS Enterprise is Montgomery Scott.

Known almost universally as “Scotty,” Montgomery Scott served as the Enterprise’s chief engineer and second officer in Star Trek: The Original Series. His engineering expertise repeatedly saved the ship, often through improvised repairs or solutions delivered under extreme time pressure. He was portrayed by Canadian actor James Doohan, whose performance gave the character his distinctive Scottish identity.

Doohan chose the first name Montgomery himself, taking it from his own middle name and honoring his maternal grandfather. Scotty’s Scottish background is part of his characterization, though details about whether he was born in Aberdeen or Linlithgow have been debated within Star Trek lore and fandom. The famous phrase “Beam me up, Scotty” became associated with him, even though that exact wording is not regularly spoken in the original television series.

Scotty later appeared in Star Trek films and in the Star Trek: The Next Generation episode “Relics,” where he was recovered from a transporter buffer after being missing for decades.