William Barnum joined Brentwood in 1984 and co-founded the firm's private equity effort. Presently, Bill serves as a Director of K-Mac Holdings, Lazy Dog, Sundance Holding Company, The Teaching Company, Veggie Grill and Zoës Kitchen. He also serves as an outside Director of Quiksilver, Inc. (NYSE: ZQK) and as a member of the Advisory Council of the Stanford Graduate School of Business, and Board of Trustees of the Harvard-Westlake School. Previously, Bill served as a director of Ariat International, Filson Holdings, ThreeSixty Group and Zumiez (NASDAQ: ZUMZ). He was also a member of the Board of Trustees of Stanford University from 2005 to 2010. 

Prior to joining Brentwood, Bill worked at Morgan Stanley & Co. in the investment banking division. He is a graduate of Stanford University, Stanford Law School, and Stanford Graduate School of Business. Bill was both an Arjay Miller Scholar and a member of the Order of the Coif.