Mark Nelson

Mark Nelson

Formal First Name

Mark Nelson is a nuclear engineer, Founder and Managing Director of Radiant Energy Group, a company committed to providing leaders with the data-driven insights and roadmaps they need to bring about a low-carbon, high-energy future. The company advises governments, nonprofits, and the industry about nuclear energy. A consultant to the clean energy industry and environmental organizations around the world, he is passionate about preventing early closures of nuclear plants around the world, working to save nuclear plants from Germany to California. Prior to Radiant Energy, Mark was a Senior Analyst at Environmental Progress, a research and policy organization fighting for clean power and energy justice to achieve nature and prosperity for all.

Professional Experience

Academic History


  • He was a Fellow at The Breakthrough Institute, a paradigm-shifting think tank committed to modernizing environmentalism for the 21st century.

  • He was an Undergraduate Research Assistant at Los Alamos National Laboratory a Mechanical Engineering Intern at Giavonni Manufacturing.


  • Mark attended the UN climate conference in Glasgow as a delegate from the American Nuclear Society.

  • His analytical work has been covered in the New York Times, Wall Street Journal, and leading European papers.

  • He has appeared as a guest on Real Vision.