Dr. Li is an Associate Professor in the Department of Radiation Oncology and Molecular Radiation Sciences at the Johns Hopkins University. He serves as the Chief Proton Physicist of the Johns Hopkins National Proton Center, located at the Sibley Memorial Hospital, Washington DC. He completed his Ph.D. Degree in Electrical and Computer Engineering at the University of Virginia, Charlottesville, VA. His professional interests are in the area of Radiation Dosimetry, Treatment Delivery and Motion Management in Proton Therapy. Before joining Johns Hopkins Medicine since April 2019, he was an Associate Professor at the Department of Radiation Physics, the University of Texas MD Anderson Cancer Center.