(written from a Production point of view)
Van Valkenburgh is probably best known as Mercy in The Warriors. In 2005, she voiced the character in the computer game based on the film. She also played the daughter of Ted Knight's character Henry Rush for five years on the American sitcom Too Close For Comfort. Since her DS9 appearance, she's played Chicago high school teacher Ms. Gonzalez in a third season episode of Once And Again (with Steven Weber).
Other TV series she's appeared in include MacGyver (1990, with Betty McGuire), Quantum Leap (1993, with Scott Bakula), Chicago Hope (1998, with Michael Bofshever, Bob Clendenin, Joanna Miles, Allan Miller, Ed O'Ross, Richard Riehle and Margot Rose), ER (2004, with Mädchen Amick, Scott Grimes, Michelle Bonilla and Lisa Moncure), Cold Case (2005, with Richard Cox and Lori Lively), and Criminal Minds (2006), with Maury Sterling).
Van Valkenburgh has also appeared in a number of films after The Warriors, including Mean Guns (1997, with Jerry Rector and James Wellington), Star Trek spoof Free Enterprise (1998, with William Shatner, Thomas Hobson, Lori Lively, Diana Cignoni, Gabrielle G. Stanton, Daren Dochterman and Chase Masterson), and the made-for-TV movie Firestarter 2: Rekindled (2002, with Malcolm McDowell).