Phil Karlson entered the film industry while a law student at Loyola Marymount University in California. He got a job at Universal Pictures as a prop man, then worked pretty much any job they threw at him, from being an assistant director on several 'Bud Abbott' .
Biography in: John Wakeman, editor. "World Film Directors, Volume One, 1890-1945". Pages 515-520. New York: The H.W. Wilson Company, 1987.