Yat Sun Or is the Chief Scientific Officer and Senior Vice President of Research and Development at Enanta Pharmaceuticals, a role held since December 1999. Yat Sun Or has been instrumental in establishing drug discovery programs from conception to clinical studies, overseeing the development of several compounds and contributing to collaborations with AbbVie. Key achievements include assembling a high-caliber research team, supervising various research directors, and advancing drug development processes for infectious diseases and non-alcoholic steatohepatitis. Yat Sun Or previously held the position of Vice President of Drug Discovery at Molecumetics and served as a Senior Project Leader at Abbott Laboratories. Yat Sun Or earned a Ph.D. in Chemistry from the University of Chicago.