Bill McCarthy is an Assistant Director of Environment, Health and Safety at the Massachusetts Institute of Technology. His primary responsibility is oversight of the radiation protection program at the MIT research reactor. Bill has been at MIT since 1997, conducting radiation safety trainings and assisting lab personnel in the design of safe experiments using radiation sources. Prior to 1997 Bill worked for the Nuclear Regulatory Commission (NRC).

Bill earned his Doctor of Philosophy (PhD) in Physics and Master of Science (MS) in Radiological Sciences from the University of Massachusetts – Lowell and is certified by the American Board of Health Physics as well as a member of their examination panel. His area of expertise is the protection of humans to exposures of ionizing and non-ionizing radiations. In 2017 he received the MIT Excellence Award for Innovative Solutions.