(written from a Production point of view)
Warren A. Stevens is a stuntman, stunt actor, stunt coordinator, and director who performed stunts as one of the cloaked Son'a chasing Data in Star Trek: Insurrection. His costume was sold off on It's A Wrap! sale and auction on eBay. 
He has doubled for stars such as Robert Duvall and works also as a producer for films such as Little Heroes 3 (2002).
Stevens has performed in or coordinated films such as Mr. North (1988), Mystic Pizza (1988), Lambada (1990), Alligator II: The Mutation (1991), Mom and Dad Save the World (1992, with Teri Garr, Wallace Shawn, Thalmus Rasulala, Dennis Madalone, and stunts by Christine Ann Baur, Sandy Berumen, Richard L. Blackwell, Chuck Borden, George Colucci, B.J. Davis, Christopher Doyle, Rosine "Ace" Hatem, Dan Koko, Ken Lesco, Irving E. Lewis, Tom Morga, John Nowak, and Lynn Salvatori), Super Mario Bros. (1993), Ice (1994, with Zach Galligan, Michael Bailey Smith, and stunts by Chino Binamo, Chuck Borden, Nick Dimitri, Joe Murphy, Mark Riccardi, and Patricia Tallman), Leprechaun 2 (1994), The Scarlet Letter (1995), Scorpio One (1997, with Robin Curtis and George Murdock), Safe House (1998, starring Patrick Stewart and with Joy Kilpatrick and stunts by Joni Avery, Rick Avery, Dan Koko, Johnny Martin, Joe Murphy, John Nowak, and Michael J. Sarna), The Base (1999), Intrepid (2000), Project Viper (2002), and Larceny (2004, with Andy Dick).