Sulgiye Park is a Research Scholar at the Center for International Security and Cooperation (CISAC) at Stanford University, where she studies nuclear fuel-cycle pathways using open-source intelligence, with a focus on North Korea, Iran and China. She earned her Ph.D. in Geological Sciences from Stanford University, researching nuclear materials in extreme environments, and later worked at the Stanford Institute of Materials and Energy Sciences (SIMES) fabricating nanodiamonds for technological applications. As a Stanton and MacArthur Fellow at CISAC, her work has included geologic analyses of uranium and critical-metal resources, fissile-material production pathways, nuclear waste governance, and U.S. critical-mineral supply chains.