Jonathan S. Leff is a managing director with Warburg Pincus and has been a member of the firm’s HealthCare Group since 1996. Prior to joining Warburg Pincus, he was a consultant at Oliver, Wyman & Co. Mr. Leff received an A.B. in Government from Harvard University and an M.B.A. from the Stanford University Graduate School of Business. Mr. Leff is a Director of Allos Therapeutics, InterMune, ReSearch Pharmaceutical Services, Sophiris Bio, Rib-X Pharmaceuticals and Talon Therapeutics. In addition, Mr. Leff serves on the boards of several trade associations and not-for-profit organizations, including the National Venture Capital Association, the Biotechnology Industry Organization, Columbia University Medical Center and the Spinal Muscular Atrophy Foundation. Mr. Leff also serves as Chair of the National Venture Capital Association’s Medical Innovation and Competitiveness Coalition (NVCA-MedIC).