Dr. Caldwell is currently employed as “Chief Scientist” for the Radiation Safety Institute of Canadaand is also an Adjunct Professor at the University of Saskatchewan. Founded in 1980, the Radiation Safety Institute of Canada is an independent, national organization dedicated to promoting and advancing radiation safety in the workplace, in the environment and in the community. Dr. Caldwell’s work at the Institute has included projects directed at reducing worker and public risks to exposure of a wide variety of radiation sources, including x-ray emitting devices, radioactive materials, lasers, ultraviolet lights and electromagnetic fields. Before joining the Institute, Dr. Caldwell worked as a Nuclear Medicine physicist and Corporate Radiation Safety Officer for more than 25 years at the University of Toronto and Sunnybrook Health Sciences Centre in Toronto, Ontario. Dr. Caldwell received his B.Sc.(H) in Physics from Acadia University, his M.Sc. in Medical Physics from McGill University and his Ph.D. in Medical Biophysics from the University of Toronto. He is author or co-author of 85 peer-reviewed papers and approximately the same number of peer-reviewed abstracts. He is a member of the Canadian College of Physicists in Medicine and a former Secretary of the Canadian Organization of Medical Physicists.