John joined our board in June 2020. He is currently Chief Executive Officer and President and a Director of Assembly Biosciences. Prior to that, he served as Chief Scientific Officer and Head of Research and Development at Gilead Sciences. During his nine years at Gilead he led the organization in the successful filing of numerous New Drug Applications (NDAs) and supplemental label updates across multiple therapeutic areas including the curative treatment regimens for chronic hepatitis C (HCV), and treatment of chronic HBV. Prior to Gilead, John held numerous positions at Duke University Medical Center, including Associate Director of the Duke Clinical Research Institute, Professor of Medicine in the Division of Gastroenterology, Director at Duke Clinical Research Unit and Co-Director of the Duke Clinical and Translational Science Award. Earlier in his career, he spent nearly a decade at Scripps Clinic and Research Foundation, and was previously an Assistant Professor of Medicine at the University of Southern California in Los Angeles. John received his degrees in medicine and surgery from the University of Melbourne in Australia, completed an internal medicine residency and gastroenterology fellowship at the Royal Melbourne Hospital, and a post-doctoral fellowship in Liver Diseases at the University of Southern California. He is a member of the Royal Australasian College of Physicians, and in 2018, he was appointed an Officer of the Order of Australia (AO).