Jack Gwaltney
Virginia-born actor Jack M. Gwaltney  played Vosk in the  fourth season episodes  and .

Gwaltney's first television appearance came in a 1987 episode of Spenser: For Hire, a series on which future  star Avery Brooks was a regular. The episode Gwaltney appeared in also co-starred fellow Star Trek guest actor Thomas Kopache. He went on to become a regular on the soap opera As the World Turns from 1993 through 1995. He also appeared in several episodes of Law & Order (including one with Josh Pais) and its various spin-off shows. 

In 1996, he starred with Keith Szarabajka in the short-lived drama Profit, and in 1998, he guest-starred in an episode of Homicide: Life on the Street, starring Michelle Forbes. Other TV credits include episodes of Sex and the City (starring Kim Cattrall), CSI: Miami, CSI: NY, and Blue Bloods (as Mark Margolis's son).

His film credits include Casualties of War (1989, with Vyto Ruginis, Steve Larson, and Sherman Howard), G.I. Jane (1997), and The Siege (1998). He also had a major supporting role in the 1990 drama Vital Signs, co-starring Jeanne Mori, Tim Ransom, Angelo Tiffe, and Wallace Langham.

Other Trek connections 
Additional film and TV projects in which Gwaltney appeared with other Star Trek performers include:
Trial by Jury (1994 film) with Graham Jarvis, Ed Lauter, and Mike Starr
Now and Again episode "Disco Inferno" (2000) with Gerrit Graham
Providence episode "Syd in Wonderland" (2000) with Ed Begley, Jr. and Concetta Tomei
Love Thy Neighbor (2002 film) with Wallace Shawn
Judging Amy episode "Dancing in the Dark" (2004) with Bob Gunton
Crossing Jordan episode "Justice Delayed" (2004) with Miguel Ferrer
Blind Justice episode "Marlon's Brando" (2005) with Patrick Kilpatrick, Jeremy Roberts, and Saul Rubinek

External link 
 

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Performers
Gwaltney, Jack