Jackie Siebens is the Vice President of Public Affairs at Helion Energy, where she leads policy strategy, government relations, and stakeholder engagement to advance commercial fusion energy. She is also a Senior Fellow with the Atlantic Council’s Global Energy Center and on the board of the Fusion Industry Association. In September 2024, she testified before the U.S. Senate Committee on Energy and Natural Resources, offering expert insight on scaling fusion deployment, strengthening supply chains, and aligning existing incentives such as the 45X manufacturing tax credit to support fusion’s path to commercialization. Previously, she served as Director of Government Affairs at Oklo and as Senior Policy Advisor for Nuclear Energy in Third Way’s Climate and Energy Program, where she crafted and championed policies to accelerate innovation and the rollout of advanced reactors. Jackie was an Associate with the Nuclear Security Program at the Stimson Center, leading private-sector analysis to develop robust nuclear security standards. She has served on the boards of the Foundation for Nuclear Studies and the International Nuclear Security Forum and has published and presented widely on nuclear energy and fusion. Her work includes co-authoring research on regulatory pathways for mass fusion deployment, including design-specific licensing frameworks, contributing analysis with the Atlantic Council on global deployment and nonproliferation, and engaging with organizations such as the International Nuclear Law Association, the International Atomic Energy Agency, the Institute for Nuclear Materials Management, and the World Institute for Nuclear Security. Jackie holds a bachelor’s degree from East Carolina University and a master’s degree from the North Carolina State University School of Public and International Affairs.