Mr. Fleming is an internationally recognized expert in the development and application PRA technology. He was the 2021 recipient of the ANS Tommy Thompson Award for Lifetime Achievements to Nuclear Safety and was inducted into the National Academy of Engineering in 2020. Mr. Fleming is 2018 Fellow of the American Nuclear Society. He is a member of the ASME/ANS Joint Committee on Nuclear Risk Management, a co-author of the ASME/ANS PRA Standard, a principal author of the ASME/ANS PRA Standard for Advanced non-LWRs, and a principal contributor to the industry led Licensing Modernization Project. He started his career during the time of the Reactor Safety Study while performing the first PRA on High Temperature Gas-Cooled Reactors at General Atomic, where he was responsible for developing the Beta Factor Method of common cause failure analysis and performing the first internal fire PRA.