By profession is he a nuclear physicist.
His research focuses on security and environmental issues associated with the management of nuclear materials and the operation of nuclear power plants. He has published articles and letters in journals and magazines including Science, The Bulletin of the Atomic Scientists and Science and Global Security. He is an active member of the Institute of Nuclear Materials Management. In the spring of 2001, he served on a Nuclear Regulatory Commission expert panel on the role and direction of the NRC Office of Nuclear Regulatory Research and briefed the Commission on his findings. In July 2001, he was again invited to a Commission meeting to discuss the licensing of new nuclear reactors in the United States.
