Cayman was a Human male who served in Starfleet in the mid-23rd century. In 2254 he was serving under Captain Christopher Pike on the USS Enterprise.

On stardate 2378.1 Cayman was part of a landing party to the Pharos siteworld in the Marrat Nebula, investigating the loss of contact with the engineers of Project Pharos. The Pharos site had been attacked by the Klingons and shortly after transporting down the landing party came under the attack. Pinned down Cayman took a disruptor blast to the shoulder; fortunately Dr Phillip Boyce was also in the landing party and was able to treat Cayman while the rest of the team made their way around the Klingons to ambush them from behind. (EV comic: "The Fires of Pharos")

USS Enterprise (NCC-1701) sciences personnel
under Charles Rasmussen & Robert April	Allinsky • Griggs • Osterman • Ramirez	under Christopher Pike	Cayman • Davies • Spock • T'Pris • Viola • Yu
under James T. Kirk (first five-year mission)	Ackroyd • Alden • Amstel • Aristeides • Avitts • Berkeley • Berganza • Boma • Berry • Brent • Calloway • Charvat • D'Amato • Darnell • Erickson • Errgang • Follett • Freeman • Harrison • Hernandez • Irizarry • Gilden • Jaeger • Jaramillo • Lowrey • Mason • McGivers • Mendoza • Nelson • O'Shea • Owens • Phillips • Romaine • Spock • Sulu • Sydney • Tamboline • Watley • Weinberg
subsequent missions under Kirk & Spock	Amaar • Bolek • Haley • Nakashima • Naraht • Saavik • Spock • Tenaida • Theras • Whitehorse
see also: administrative personnel • communications personnel • engineering personnel • medical personnel • pilots & flight control personnel • security & tactical personnel • senior staff • unnamed