Dr. Yaorong Qian is the Senior Scientist at the Analytical Chemistry Branch, Biological and Economic Analysis Division of the Office of Pesticide Programs, U.S. Environmental Protection Agency.  He has been working at the U.S. EPA for over 20 years on a variety of pesticide chemistry issues and scientific research projects for a wide range of chemicals from fumigants, disinfectants, conventional pesticides, to PFAS.  He leads studies on emerging issues in pesticide chemistry and developments of methods and guidelines.