Costa
Lieutenant junior grade Costa was a Starfleet engineer technician stationed on board the  in the 2360s.

While the Enterprise-D was en route to Nahmi IV in 2366, he was ordered to realign the magnetic capacitors together with his colleague . ()

By late 2367, Costa was one of only four crewmembers of the Enterprise-D (the others being Data, Geordi La Forge, and Miles O'Brien) who had the skill to reprogram thirty to forty isolinear chips in half a dozen subsystems in a short amount of time. ()

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Humans
Starfleet operations personnel
USS Enterprise (NCC-1701-D) personnel