John P. Holdren is the Teresa and John Heinz Research Professor of Environmental Policy at Harvard’s Kennedy School of Government, as well as co-director of the Science, Technology, and Public Policy program, the Energy Technology Innovation Project, and the Arctic Initiative in the School’s Belfer Center for Science and International Affairs. He is also emeritus professor in the Department of Earth and Planetary Sciences and emeritus affiliated faculty member in the John A. Paulson School of Engineering and Applied Science at Harvard, and emeritus professor of energy and resources at the University of California, Berkeley. (He retired from classroom teaching at Harvard in July 2021.) From 2009 to January 2017, he was President Obama’s science advisor, Senate confirmed director of the White House Office of Science and Technology Policy, chair of the National Science and Technology Council, and cochair of the President’s Council of Advisors on Science and Technology (PCAST). He is a member of the National Academy of Sciences, National Academy of Engineering, American Academy of Arts and Sciences, and American Philosophical Society, as well as a foreign member of the Royal Society and the Indian National Academy of Engineering. His many awards include the Arthur Bueche Award of the NAE and the Public Welfare Medal of the NAS. He received his SB and SM in aeronautics and astronautics from MIT, and his PhD in theoretical plasma physics from Stanford University.