William Steinkamp (b. June 9, 1953) is an American film editor with more than 28 film credits. He had a longstanding, notable collaboration with director Sydney Pollack, editing nearly all of Pollack's films from Tootsie (1982) through the director’s last film, The Interpreter (2005).
Steinkamp's first credits are as an assistant editor to his father, Fredric Steinkamp, on two of Pollack's films in the late 70's from 1980 on. Steinkamp co-edited most of Pollack's films with his father. After his father's retirement in 1994, William Steinkamp became Pollack's principal editor through the end the latter's career in 2005. Since Steinkamp has had a long relationship with director Gary Fleder, from Kiss the Girls (1997) through The Express (2008).
Steinkamp has been nominated for an Academy Award for Film Editing two films directed by Sydney Pollack, Tootsie (1882) and Out of Africa (1995) as well as for The Fabulous Baker Boys directed by Steve Kloves (1989).
He has been nominated for ACE Eddie awards for editing Tootsie (1982), Out of Africa (1985),and Scent of a Women, directed by Martin Breast (1992).