Duncan is a serial entrepreneur who most notably founded Covad Communications and SkyPilot Networks. He also was a senior exec at InterTrust and led their IPO. Prior to Bullpen, he co-founded one of the first mobile social app companies, Xumii, later sold to Myriad Group and now powering over 120M users in the developing world. At Bullpen, he focuses on mobile and consumer internet investments and sits on the boards of DoubleDutch, Filament, Verbling and Sourceeasy, among other invesments. He received a Sc.B. in physics/math from Brown University, with Honors, and a J.D. magna cum laude from Michigan Law School, where he was Order of the Coif and a member of the Law Review.