Guillermo Masada was a male human in Starfleet in the 23rd century.

As of 2266, Masada held the rank of lieutenant, and served as science officer and second officer of the USS Constellation under Commodore Matthew Decker. (TOS - The Brave and the Bold novella: The First Artifact)

Masada perished, along with the rest of the Constellation crew, during that ship's encounter with an alien "planet killer" in 2267. (TOS episode: "The Doomsday Machine")

In an alternate timeline, Masada was assigned to the UESS Enterprise as science officer in 2264. (Star Trek: Myriad Universes novel: A Less Perfect Union)

Constellation personnel
United Earth, Earth Starfleet	Constellation	Monique Duvall
Federation, Starfleet	USS Constellation (NCC-1017)	Alamanzar • R. Armstrong • M. Decker • Guthrie • G. Howard • Jazayerli • Lawford • H. Litwak • G. Masada • L. Rosenhaus • N. Shickele • Sontor • C. Soo • H. Takeshewada • E. Vascogne
	USS Constellation II	R. Cross • C. Ikeya • A. MacDougall • Raela hr'Sassish • I. Sasoaka • M. Walsh
mirror universe	ISS Constellation Terran Empire, Starfleet	Matthew Decker • Hiromi Takeshewada

ConnectionsEdit

• Masada article at Memory Alpha, the wiki for canon Star Trek.