Rex, who holds a BA in Biochemistry from Rice University as well as an MD from Baylor College of Medicine in Texas, joined F2G from AstraZeneca, where he held the position of Senior Vice President and Head of Infection, Global Medicines Development. Before joining AZ, he was Professor of Medicine at the University of Texas Medical School at Houston. Dr Rex has been the Industry Representative on the US FDA Anti-Infective Drug Advisory Committee (2007-2011), has served as Chair of the Consensus Committee on Microbiology for the Clinical Laboratory Standards Institute (CLSI, formerly NCCLS), is a member of the Wellcome Trust Seeding Drug Discovery Committee, was formerly an Editor for Antimicrobial Agents and Chemotherapy and currently serves on several editorial boards.