(written from a Production point of view)
Daniel W. Barringer is a stuntman, stunt actor, and stunt coordinator who performed stunts as a Starfleet security officer in Star Trek Nemesis and served as stunt double for David Kagen in the Star Trek: Enterprise episode "Detained". He received no on-screen credit for the latter one and his costume from this episode was auctioned off on the It's A Wrap! sale and auction on eBay. 
He has doubled for stars such as Kevin McNally and Ruben Blades.
Among his stunt resume are films such as Police Academy 2: Their First Assignment (1985, with David Graf, Arthur Batanides, and stunts by Hubie Kerns, Tom Morga, Bernie Pock, Spiro Razatos, and Brian J. Williams), Slow Burn (1986), Three Fugitives (1989, with Alan Ruck, Bruce McGill, Albert Henderson, Tim de Zarn, Brian Thompson, Sherman Howard, and stunts by Tony Brubaker, Mark Donaldson, Andy Gill, Lane Leavitt, Don Pulford, Spike Silver, Lincoln Simonds, and Brian J. Williams), Skin Deep (1989, with Joel Brooks and Denise Crosby), Dark Angel (1990, starring Matthias Hues), Eve of Destruction (1991, with Tim Russ, Tom Morga, George Wilbur, Tom Lupo, Thomas Knickerbocker, Jeff McCarthy, Dakin Matthews, and Randy Hall), The Hand That Rocks the Cradle (1992, with Matt McCoy and John de Lancie), Robin Hood: Men in Tights (1993, with Patrick Stewart, Brian George, Clive Revill, Clement von Franckenstein, Chase Masterson, and stunts by Erik Cord and Scott Leva), The Pelican Brief (1993), The Mask (1994), Casino (1995), Down Periscope (1996, starring Kelsey Grammer), The Crow: City of Angels (1996, with Iggy Pop), Mars Attacks! (1996, with Paul Winfield), Hard Rain (1998, with Christian Slater), Six Days Seven Nights (1998), Double Jeopardy (1999, with Ashley Judd), The Perfect Storm (2000, with Bob Gunton, Christopher McDonald, Billy Mayo, and stunts by Brian Avery, Richard L. Blackwell, Joey Box, Mark Chadwick, Eliza Coleman, Doug Coleman, Dana Dru Evenson, Kurt Lott, James Ryan, and Jennifer Watson), Ocean's Eleven (2001), Road to Perdition (2002), National Treasure (2004), and The Ring Two (2005).
Barringer has performed in or worked as an assistant stunt coordinator for all three Lord of the Rings films (2001-2003) and all three Pirates of the Caribbean films (2003, 2006, and 2007, with Tom Morga, Tony Angelotti, Lisa Hoyle, Theo Kypri, and Mark Aaron Wagner).
He has also performed stunts in television series such as Nowhere Man (1996, with Robin Sachs), Married with Children, Orleans, JAG, Nash Bridges, Days of our Lives, Babylon 5 (starring Andreas Katsulas and Bill Mumy), Sliders (starring John Rhys-Davies), Buffy the Vampire Slayer, Renegade (starring Branscombe Richmond), Murder She Wrote, The Practice, and The A-Team (starring Dwight Schultz).