For Giant (1956), he constructed the Victorian home that sits isolated in a wide expanse of open field, which became an iconic image for the film.
His work for West Side Story (1961), which won him the Academy Award for Best Color Art Direction, included actual New York City locations combined with a tenement rooftop and fire escape, inspired by the more abstract stage production, that were built on a soundstage.
As an art director, Leven contributed to The Flying Deuces (1939), Hello Frisco, Hello (1943), Invaders from Mars (1953), The Silver Chalice (1954), and Jonathan Livingston Seagull (1973), among others.
His credits as production designer include Donovan's Brain (1953), Anatomy of a Murder (1959), Two for the Seesaw (1962), The Sand Pebbles (1966), The Sound of Music (1965), Star!
Prior to her death, she had donated several of Boris Leven's paintings and film drawings to the University of Southern California and New York City's Museum of Modern Art.