Dr. Milligan joined Gilead Sciences in 1990 and was appointed Chief Executive Officer in March 2016. He began his career at Gilead as a research scientist, and subsequently held leadership positions in project management and corporate development before being named Chief Financial Officer in 2002. He was appointed Chief Operating Officer in 2007 and President in 2008.

During his tenure at Gilead, Dr. Milligan has led teams that have developed, manufactured and commercialized more than 20 new therapies for significant unmet needs. He has managed multiple transformative acquisitions, licensing agreements and financings, helping the company grow into a worldwide organization reaching more than 10 million patients. He is a member of the board of Pacific Biosciences of California, Inc. and a Trustee of Ohio Wesleyan University.

Dr. Milligan received his BA from Ohio Wesleyan University, his PhD in biochemistry from the University of Illinois and was an American Cancer Society postdoctoral fellow at the University of California at San Francisco.