Hal V. Barron occupies the position of Executive Director & Chief Scientific Officer at GlaxoSmithKline Plc. Dr. Barron is also on the board of GRAIL, Inc. and Cardiologist at UCSF Medical Center and Adjunct Professor at The University of California, San Francisco. Dr. Barron previously occupied the position of Director & Senior Vice President-Development at Arête Therapeutics, Inc., Chief Medical Officer & Executive Vice President at Roche & Genentech, Inc., President for Tesaro, Inc., Chief Medical Officer & EVP-Global Development at Genentech, Inc., Chief Medical Officer & Executive Vice President at F. Hoffmann-La Roche Ltd., Chief Medical Officer & Executive Vice President at Roche Pharmaceuticals, Inc. and President-Research & Development at Calico LLC. He received a doctorate from Yale University and an undergraduate degree from Washington University in St. Louis.