Mark is a co-founder and partner at Third Rock Ventures. Prior to that, Mark served as chief executive officer of Millennium Pharmaceuticals for 12 years. Earlier in his career, Mark was co-founder of Mayfield Fund’s life sciences effort and an engineer and project leader at Eli Lilly and Genentech. He is a member of the National Academy of Engineering and the Friends of Personalized Medicine, and he co-founded the Possible Project in Cambridge, Mass. Mark holds a B.S and M.S. in chemical and biochemical engineering from Washington University.