Dong Xiao is a highly experienced Principal Scientist specializing in External Discovery Chemistry at Merck, with a tenure starting in November 2009. In this role, Dong manages multiple external project leads and oversees significant teams to deliver innovative solutions from discovery to large-scale synthesis. Prior experience includes serving as Associate Director of External Discovery Process Chemistry and Senior Principal Scientist at Schering-Plough Research Institute, where responsibilities included leading discovery chemistry efforts. Earlier in Dong's career, work as a Pharmaceutical Scientist at the State Food & Drug Administration of China focused on drug quality control and pharmaceutical analysis. Dong holds a Ph.D. in Organic Chemistry from the University of Pennsylvania, completed in 1999.