(written from a Production point of view)
Christopher J. Marcinko (born 27 August 1974; age 42) is a former television background actor who appeared as a background Bajoran security deputy in the last episode of Star Trek: Deep Space Nine, "What You Leave Behind". He worked one day on the set and received no credit for his appearance.
Marcinko was born in Bridgeport, Connecticut and moved through several citties during his life. Today he is living in Denton, Texas and is working as a network security architect.
He portrayed background characters in the television series 21, Jump Street (1988, with Richard McGonagle), Quantum Leap (1993, starring Scott Bakula and Dean Stockwell, and with Bruce McGill, Richard Herd, W. Morgan Sheppard, Stephen McHattie, Mike Genovese, Susan Diol, Dan Butler, and Kevin McDermott), Walker, Texas Ranger (1996, with Julia Nickson), Spin City (1997, with Alan Ruck, Victoria Dillard, and John Harrington Bland), Buffy, the Vampire Slayer (2001), The West Wing (2001, with Don McManus and Angelo Tiffe), Dawson's Creek (2003), House M.D. (2005, with Jennifer Morrison), and Boston Legal (2005, with Rene Auberjonois, William Shatner, Gregory Itzin, Leslie Jordan, John Thaddeus, John Berg, and Charles S. Chun).