(written from a Production point of view)
Billy Brown is the actor who plays the pilot of the USS Kelvin's Medical shuttle 37 in 2009's Star Trek. In addition to his work in film and television, he has lent his voice to several videos games and is also the exclusive voice of US Marine Corps. 
Brown made his film debut in the 1993 independent drama Dreamrider, which also featured Leigh Taylor-Young. His first major studio film was Geronimo: An American Legend, released that same year. Kevin Tighe and Jim Beaver had roles in the latter film, as well. Years later, in 1997, Brown appeared in The Beautician and the Beast (featuring Vincent Schiavelli) and The Lost World: Jurassic Park.
In 2002's The Wild Thornberrys Movie, Brown can be heard as the voice of a rhino. Fellow Star Trek alumni Earl Boen, John Kassir, Brock Peters, Ethan Phillips, Keith Szarabajka, and Alfre Woodard had voice-over roles in this film, as well. Brown then played Private Ottis Brick in the direct-to-DVD science fiction sequel Starship Troopers 2: Hero of the Federation. Ed Lauter and Lawrence Monoson also appeared in this film.
Star Trek is the second film he has worked on that was produced by J.J. Abrams, following the hit 2008 science fiction thriller Cloverfield. One of Star Trek's casting directors, Alyssa Weisberg, was the casting director on Cloverfield; as such, Brown and many of his Cloverfield co-stars – including Susse Budde, Margot Farley, Tim Griffin, Pasha Lychnikoff, and Kelvin Yu – were brought in by Weisberg and ultimately given roles on Star Trek.
Brown had a small role in the 2008 thriller Lakeview Terrace, which also featured Ron Glass and Robert Pine. Most recently, he had a supporting role in the sci-fi adventure Race to Witch Mountain, opposite Dwayne "The Rock" Johnson. Robert Clendenin, Ike Eisenmann, and the aforementioned John Kassir also had roles in this film.
Brown made his television debut in a 2004 episode of CS: NY with Symba Smith. Later that year, he was seen on NCIS, and the following year, he appeared on Cold Case. Brown then landed the recurring role of Master Sergeant Meeks on the NBC drama E-Ring (with Jonathan Banks, Annie Wersching, and director David Barrett). Brown again worked with Wershing on the Fox Network pilot Company Man, which also featured Michael Reilly Burke.
Brown played the recurring role of Tweety McDaniel on the FX drama series Dirt. (with series regular Jeffrey Nordling and guest star Sharon Lawrence). Brown also appeared in an episode of Criminal Minds and worked on the NBC pilot Backyards & Bullets, along with his Cloverfield and Star Trek co-star, Tim Griffin.
Brown currently has a recurring role as part of the cast of FOX's new hit show The Following.