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 is the Chairman of the Board of Directors and Chief Executive Officer at Gilead Sciences.

He joined Gilead in March 2019. Prior to Gilead, Dan served as the Chief Executive Officer of Roche Pharmaceuticals. His career at Roche spanned more than three decades, during which he held a number of executive positions in the company’s pharmaceutical and diagnostics divisions in North America, Europe and Asia. He served as a member of Roche’s Corporate Executive Committee, as well as on a number of 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. He is currently the chair of the Board of Directors of the Pharmaceutical Research and Manufacturers of America (PhRMA) organization and he serves on the Board of Directors of Georgetown University.