Arnold Gundersen

Arnold "Arnie" Gundersen (born January 4, 1949, in Elizabeth, New Jersey) is a former nuclear industry executive and engineer who became a whistleblower in 1990. Gundersen has written dozens of expert reports for nongovernment organizations and the state of Vermont. Gunderson was a licensed reactor operator from 1971-1972 on Rensselaer Polytechnic Institute's zero-power open-pool university research reactor at the Reactor Critical Facility in Schenectady, New York, where he was a nuclear engineering graduate student.

Gundersen questioned the safety of the Westinghouse AP1000, a third-generation nuclear reactor, and has expressed concerns about the operation of the Vermont Yankee Nuclear Power Plant. He served as an expert witness in litigation after the Three Mile Island accident and has provided commentary on the Fukushima Daiichi nuclear disaster.