President of Beigelman, Feiner & Feldman, P.C. Mark specializes in entertainment, arts, media, corporate, real estate and bankruptcy law. Mark earned a master of arts degree from New York University and is a magna cum laude graduate of Cardozo Law School where he served as Senior Editor on the Cardozo Law Review.

Since 1996 he has served as an adjunct professor at New York University.

Mark was formerly associated with the law firm of Cleary, Gottlieb, Steen & Hamilton and was a founding partner of the law firm of Warren, Alpert & Beigelman.

Prior to becoming an attorney, Mark served as a producer of the original off-Broadway production of Cloud 9 by Caryl Churchill and the Broadway productions of the Tony award winning musicals Nine and The Tap Dance Kid. In 1999, he served as an executive producer of the motion picture Trick, a film in competition at the 1999 Sundance Film Festival and released nationally by Fine Line Features in July of 1999, “Indocumentados” (2002), “A Dios Momo” (2005). As an attorney, Mark has served as production counsel on numerous films, including “Sling Blade,” “In the Bedroom,” “Pineiro,” “Kissing Jessica Stein,” “Junebug,” and "Then She Found Me" and has done work on numerous theatrical productions both on Broadway and Off-Broadway. He is admitted to the bars of New York and Connecticut.