John is an experienced life sciences executive who is currently Chief Executive Officer and President of Assembly Biosciences. Prior to this, he spent nine years at Gilead Sciences as Chief Scientific Officer and Head of Research & Development. At Gilead he led the organization in the successful filing of numerous New Drug Applications (NDAs) and supplemental label updates across multiple therapeutic areas. Before this, he held various positions at Duke University Medical Center. John received his degrees in medicine and surgery from the University of Melbourne in Australia and in 2018 was recognized as an Officer of the Order of Australia for his distinguished service to medical research. He serves as the Board representative of Oxford Sciences Innovation.