Johanna Wolfson is Principal at the PRIME Impact Fund, backing breakthrough climate-focused ventures with philanthropic capital. She joined PRIME from her role as Director of Technology-to-Market in the Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE). Her work at DOE included testing new models for financing and commercialization, launching entrepreneurs and new businesses out of universities and National Labs, and supporting early-stage clean energy businesses with funding, training, and technical resources. Prior to DOE, Johanna was with the Fraunhofer Center for Sustainable Energy Systems where she led TechBridge, a technical validation and demonstration program that de-risks promising early-stage energy technologies prior to investment. Johanna has a Ph.D. in Physical Chemistry from MIT, where she conducted research on photo-induced solid-state dynamics.