Jonathan S. LeffPartner and Chairman at Deerfield Management and Deerfield Institute
Jonathan is a Partner on the Private Transactions team and Chairman of the Deerfield Institute. Jonathan joined Deerfield in 2013, and focuses on venture capital and structured investments in biotechnology and pharmaceuticals. Prior to joining Deerfield, for more than 16 years, Jonathan was with Warburg Pincus, where he led the firm’s investment efforts in biotechnology and pharmaceuticals. Jonathan has also been active in public policy discussions related to healthcare and medical innovation. He previously served as a member of the Executive Committee of the Board of the National Venture Capital Association (NVCA), and previously led NVCA’s life sciences industry efforts as Chair of NVCA’s Medical Innovation and Competitiveness Coalition (NVCA-MedIC). Jonathan also serves on the Emerging Companies Section Board of the Biotechnology Industry Organization. Jonathan is a member of several not-for-profit Boards, including the Spinal Muscular Atrophy Foundation, Friends of Cancer Research, and the Columbia University Medical Center Board of Advisors. Jonathan received his A.B. from Harvard University, and earned his M.B.A. from Stanford Graduate School of Business.