Daniel O’Day

Chairman and Chief Executive Officer, Gilead Sciences, Inc.

Portrait photo of Daniel O'Day, CEO of Gilead Sciences, Inc.

Daniel O'Day serves as Chairman of the Board of Directors and Chief Executive Officer at Gilead Sciences.

Dan joined Gilead in March 2019 after more than three decades at Roche Pharmaceuticals where he also served as Chief Executive Officer. During his career at Roche, he held a number of prior executive positions in the company's pharmaceutical and diagnostics divisions in North America, Europe and Asia. He was a member of Roche's Corporate Executive Committee and served on several public and private boards, including Genentech, Flatiron Health and Foundation Medicine.

Dan holds a bachelor's degree in biology from Georgetown University and an MBA from Columbia University in New York. He is currently the chair of the Board of Directors of the Pharmaceutical Research and Manufacturers of America and he serves on the Board of Directors of Georgetown University.