From 1950 to 1960 David worked at Bantam, starting as a publisher's reader then advancing to editorial director and editor in chief. He had known Bantam's president Oscar Dystel during their time working on Stars and Stripes in Cairo. Whilst at Bantam David lured Ross Macdonald away from Pocket Books and hired artist James Avati. Rather than reprint several hardcover Western authors, David thought of hiring and promoting one author to write three original books for Bantam every year. Out of a shortlist of five authors, David chose Louis L'Amour who had been disillusioned with Fawcett publishing.
He became a producer at 20th Century Fox with the 1964 World War II prisoner of war adventure Von Ryan's Express filmed on location in Italy with Frank Sinatra and a strong cast. He then produced three spy-fi films, Our Man Flint, Fantastic Voyage, and In Like Flint. All four films were big commercial successes. The plot of In Like Flint concerns a missing three minutes in the life of the President of the United States. Ironically, when Fox edited out three minutes of In Like Flint that added more depth to the film, David left the studio. Years later David was enraged when watching ten to fifteen minutes cut out of Our Man Flint during a television showing that "was not so much re-edited as lobotomised into senselessness". He wrote to California Senator George Murphy to say that as a publisher had to inform readers they were buying and reading an abridged works so should television stations inform their viewers they were watching abridged films.
Later Films
David produced Skullduggery originally for ABC Pictures, but after a disagreement the film and David went to Universal Pictures. Though he announced a busy production schedule of five films, none were made. Still interested in science fiction David recalled the book Logan's Run and produced the film in 1976. Logan's Run won a Special Achievement Academy Award for visual effects, which was presented by actor Roy Scheider to L.B. Abbott, Glen Robinson, and Matthew Yuricich at the 49th Annual Academy Awards show on March 28, 1977 at the Dorothy Chandler Pavilion. During his acceptance speech, L.B. Abbott said, "I want to very sincerely thank the Board of Directors of the Academy. The producer, Mr. Saul David, and that great host of wonderful helpers made this accolade possible for me." MGM hired David to produce a television version of the film in 1977 but then fired him and "hired and inept team of producers who knew nothing whatever about science fiction," said William F. Nolan. He died of congestive heart failure in Culver City, California.