Stewart Prager is professor of astrophysical sciences at Princeton University. From 2009 to 2016, he was director of the Princeton Plasma Physics Laboratory, a Department of Energy national laboratory. He received his Ph.D. in plasma physics from Columbia University in 1975. Following two years performing fusion energy research at General Atomics in San Diego, he joined the University of Wisconsin – Madison as a faculty in the Physics Department. Prager’s research has focused on basic plasma physics, particularly applications to fusion energy. While at Wisconsin, Prager was director of the Madison Symmetric Torus (MST) experimental facility. He also served as founding director of the Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, established through the National Science Foundation program of “physics frontier centers.” He has served as Chair of the Fusion Energy Sciences Advisory Committee for DOE, Chair of the Division of Plasma Physics American Physical Society, President of the University Fusion Association, and a member of the fusion review panel of the President’s Council of Advisors in Science and Technology. Prager is a co-recipient of the American Physical Society Dawson Award for Excellence in Plasma Physics, a recipient of the Distinguished Career Award from Fusion Power Associates, and is a fellow of the American Physical Society.