(written from a Production point of view)
Kevin Neil Derr (born 13 April 1981; age 39) is a stuntman and stunt actor who performed stunts during the run of Star Trek: Enterprise. He also portrayed MACO Corporal Kelly on the last two seasons and received no credit for his appearances. Due to the re-use of costumes and name tags, Derr wore the tag E. Hamboyan in several episodes but his character was identified as Kelly and Hamboyan was portrayed by background actor Andrew MacBeth. According to the IMDb, Derr also performed stunts in Star Trek Into Darkness.
Derr was born in Hollywood, California. In 2004, he was nominated for two Taurus World Stunt Awards for best specialty stunt and best overall stunt by a stuntman for his work in the sport drama Seabiscuit. He has doubled for stars such as Tobey Maguire and Guy Pearce.
His stunt resume includes films such as Swordfish (2001), The Time Machine (2002, written by John Logan), Spider-Man (2002, with Kirsten Dunst), Seabiscuit (2003), The Island (2005, with Ethan Phillips, Noa Tishby, Randy Oglesby, Katy Boyer, Glenn Morshower, and stunts by Eddie Braun, Alex Chansky, Steve Kelso, Denney Pierce, Justin Sundquist, and Spice Williams-Crosby), Poseidon (2006), and World Trade Center (2006).
He has also performed stunts in television series such as Alias, American Dreams (starring Ethan Dampf), Medium, Six Feet Under, and CSI: Miami (2006).