Yongjun Li is a seasoned scientist currently serving as an Associate Principal Scientist at Merck since October 2014, where previous experience includes a role as Senior Scientist. Prior to joining Merck, Yongjun Li worked at Columbia University from January 2009 to October 2014 as an Associate Research Scientist and Postdoctoral Associate. Beginning the professional journey at the University of Florida, Yongjun Li held the position of Research Assistant from August 2004 to December 2008 while simultaneously completing a PhD in Chemistry at the same institution.