His research focuses on clinical and alpha dosimetry, modeling, and external beam radiation.Dr. Hobbs is a member of the Radionuclide Therapy and Dosimetry (RTD) Research Lab, where he performs tail vein injections and bio-distribution, and provides assistance to Dr. Hong Song. He is engaged in research that examines how tumor burden and prior chemotherapy affects bone marrow dosimetry.Dr. Hobbs earned his Ph.D. in experimental high-energy physics from the University of New Mexico. Dr. Hobbs joined the Johns Hopkins faculty in 2006.