Dr. Jorgensen is a tenured Associate Professor in the Department of Radiation Medicine at Georgetown University. He received his PhD in radiation biology from Johns Hopkins, and subsequently did a research fellowship at Harvard, studying radiation damage to DNA. His research at Georgetown has focused on cellular DNA repair. The joint goals of this work have been to both improve cancer radiotherapy by disrupting DNA repair in tumor cells, as well as to better understand the role of DNA repair in determining cancer risk. In 2003-04, he spent a sabbatical year as Visiting Scholar at Johns Hopkins, funded through a National Cancer Institute Senior Fellow Award, where he investigated the association between DNA repair genes and breast cancer risk among women with a family history of breast cancer in Washington County, Maryland. In 2005, he was awarded a Master of Public Health degree in cancer epidemiology. And since 2006, he has served on the National Council for Radiation Protection (NCRP), an independent body of academics that advises the federal government on setting safety limits for radiation exposure to the public.