Kenneth L. Mossman is a professor of health physics in the School of Life Sciences and affiliated faculty member of the Center for the Study of Law, Science and Technology at Arizona State University in Tempe, where he has also served as assistant vice president for research and director of the university’s Office of Radiation Safety. Prior to his arrival at Arizona State University, Dr. Mossman was a faculty member of the medical and dental schools at Georgetown University in Washington, DC, and was professor and founding chairman of the Department of Radiation Science at Georgetown’s Graduate School. His research interests include radiological health and safety and public policy. Dr. Mossman has authored more than 150 publications related to radiation health issues. He served as president of the Health Physics Society and received its prestigious Elda Anderson Award, the Marie Curie Gold Medal, and the Founder’s Award. He has been a Sigma Xi distinguished lecturer and is a fellow of the Health Physics Society and the American Association for the Advancement of Science. He has served on committees of the National Research Council, the National Institutes of Health, the U.S. Nuclear Regulatory Commission, the Nuclear Energy Agency of the Organization for Economic Cooperation and Development (Paris), and the International Atomic Energy Agency (Vienna). Dr. Mossman earned a BS in biology from Wayne State University, MS and PhD degrees in radiation biology from the University of Tennessee, and an MEd degree in higher education administration from the University of Maryland. Dr. Mossman is also author of The Radiobiological Basis of Radiation Protection Practice (1992) Lippincott Williams & Wilkins, with William Mills and Arbitrary and Capricious (2004) AEI Press, Washington, DC with Gary Marchant.