Pierce has been a member of the board of directors since January 2017. He currently serves as entrepreneur-in-residence at Third Rock Ventures LLC. At Third Rock, he co-founded Ambys Medicines, Inc., and served as Chief Medical Officer.  Pierce previously served in several roles at Biogen, Inc., including as Senior Vice President leading the hematology, cell and gene therapies division. Prior to Biogen, he served multiple roles in a variety of biopharmaceutical firms, including Bayer, AG; Inspiration Pharma, Ltd; Avigen, Inc.; Selective Genetics, Inc.; and Amgen, Inc., in the areas of tissue regeneration and hematology. Pierce is the co-author of more than 150 scientific papers and an inventor on more than 15 patents. He served on the medical and scientific advisory council, the board of directors and was President of the board of the National Hemophilia Foundation. Pierce also served on the Blood Products Advisory Committee at the FDA and the Committee on Blood Safety and Availability at the U.S. Department of Health and Human Services. He currently serves on the board of directors of the World Federation of Hemophilia and as the organization’s Vice President, Medical.  Pierce received an M.D. and a Ph.D. in Immunology, both from Case Western Reserve University in Cleveland, and completed his postgraduate training in pathology and hematology research at Washington University in St. Louis.