He has a special interest in human nature, evolution, the body, and religion as a natural phenomenon. After working at PBS, David became a successful film-industry freelancer, recording sound for fiction film, shooting documentary, and editing video until he had advanced his career to the point where he could pursue his own projects. David owns and operates Structure Films LLC, a start-up documentary film company that focuses on how science and health are transforming society. David graduated from Stanford University's Documentary Film and Video MFA program in 2010, and now lives and works in New York City.