De Graff worked as assistant editor on the television series Melrose Place (1992-1993) and Go West (1994). As editor, his credits include the television drama Boy Meets Girl (1993, directed by Kevin Rodney Sullivan), the television series New York Undercover (1994), Law & Order (1995-1999), City of Angels (2000), and Soul Food (2000, starring Vanessa Williams), the horror comedy Dead Lawyers (2004, with F. Murray Abraham), the television comedy 52 Fights (2006), the television drama I'm Paige Wilson (2007), and the television series Carnivàle (2005), Revelations (2005), In Justice (2006), Hidden Palms (2007, with Sharon Lawrence), Eli Stone (2008), and Harper's Island (2009).