Memory Beta, non-canon Star Trek Wiki

A friendly reminder regarding spoilers! At present the expanded Trek universe is in a period of major upheaval with the finale of Year Five, the Coda miniseries and the continuations of Discovery, Picard and Lower Decks; and the premieres of Prodigy and Strange New Worlds, the advent of new eras in Star Trek Online gaming, as well as other post-55th Anniversary publications. Therefore, please be courteous to other users who may not be aware of current developments by using the {{spoiler}}, {{spoilers}} or {{majorspoiler}} tags when adding new information from sources less than six months old. Also, please do not include details in the summary bar when editing pages and do not anticipate making additions relating to sources not yet in release. 'Thank You


Memory Beta, non-canon Star Trek Wiki
See Masada for other articles with titles that contain, either by relationship or by coincidence, this character's surname.

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


By 2263, Masada held the rank of lieutenant, and served as science officer and second officer of the USS Constellation under Commodore Matthew Decker. In that year, during the survey of Ravanar IV in the Taurus Reach, he discovered a mold containing an anomalously high count of chemical base pairs. Masada determined, that the Constellation's lab facilities were inadequate to pursue the matter, so Commodore Decker decided to transmit their findings to Starfleet Command. (VAN novel: Harbinger)

In 2266, he still served on the Constellation in the same capacity during the Alpha Proxima II crisis. (TOS - The Brave and the Bold, Book One 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 Terran emblem. Terran emblem.
Federation, Starfleet USS Constellation (NCC-1017) AlamanzarR. ArmstrongM. DeckerGuthrieG. HowardJazayerliLawfordH. LitwakG. MasadaPonorL. RosenhausN. ShickeleSontorC. SooH. TakeshewadaE. Vascogne Emblem of the United Federation of Planets. Starfleet emblem. Assignment patch image.
USS Constellation II R. CrossC. IkeyaA. MacDougallRaela hr'SassishI. SasoakaM. Walsh
USS Constellation
(Kelvin timeline)
DekkerLin Emblem of the United Federation of Planets. USS Enterprise assignment insignia.
mirror universe ISS Constellation
Terran Empire, Starfleet
Matthew DeckerPonorHiromi Takeshewada Terran Empire emblem.
UESS Enterprise personnel (alternate timeline)
Phillip BoycePavel ChekovLee KelsoJames T. KirkMarchGuillermo MasadaLeonard McCoyAnn MulhallChristopher PikeMontgomery ScottJohn StilesNyota UhuraVinci UE flag image.

External liks[]