Spencer Klein joined the Nuclear Energy Institute (NEI) in 2024 and is a Senior Project Manager of New Nuclear in the Technical and Regulatory Services Division. In this role, he leads programs designed to improve the commercial environment for the nuclear energy industry’s prospects for deploying new nuclear power plants with a focus on 10 CFR Part 50/52 licensing processes and lessons learned, international regulatory harmonization, regulation of rapid high-volume deployable reactors, and the deployment of micro-reactor's for Military and Space-based applications.

Prior to joining NEI, Spencer worked for Ultra Safe Nuclear and the Tennessee Valley Authority in the area's of site characterization and licensing for the deployment of advanced nuclear technologies.

Spencer is a certified Project Management Professional (PMP) and holds a bachelor’s and master’s degree in Engineering Management from the University of Tennessee at Chattanooga, and a Certification of Specialization in Leadership & Management from Harvard Business School.