DeMille received his MFA in Film Directing from UCLA, where he wrote, directed and produced a number of award-winning films. His thesis film, The Absence, played at dozens of festivals around the country and received numerous awards, including Best Film at the San Diego Comic-Con. He has since written several feature-length screenplays, and has edited independent shorts, features, and documentaries, as well as commercial content for HBO, Sundance, Hulu and a number of high fashion brands. In 2018, he edited the short film My Nephew Emmett, which was nominated for an Oscar for Best Live Action short. He is currently developing his first feature.