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Percy brings more than 20 years of global leadership in pharmaceutical companies and industry experience. Prior to joining Blueprint Medicines, he served as Chief Scientific Officer at FibroGen, Inc. He previously served as Global Head of Discovery Sciences at Janssen Pharmaceuticals, Inc., a division of Johnson & Johnson, where he led more than 700 employees comprising several key research and discovery functions, and drove the synthetic discovery strategy in collaboration with partners across various therapeutic areas. From August 2001 to May 2019, Percy held roles of increasing responsibility in drug discovery, covering all therapeutic areas, drug platforms and stages of discovery at Bristol-Myers Squibb (BMS), including serving as Senior Vice President and Head of Discovery. Prior to his experience at BMS, he was Senior Research Scientist in Chemical and Physical Sciences at DuPont Pharmaceuticals, until it was acquired by BMS in 2001. Percy is an inventor or co-inventor on more than 28 U.S. patents, and has authored or co-authored numerous peer-reviewed publications. Percy currently serves as a member of the board of directors for Cellarity and HiFiBiO Therapeutics. He received an A.B. in Chemistry from Dartmouth College and a Ph.D. in Organic Chemistry from Harvard University. In addition, he received an MBA from Massachusetts Institute of Technology.