Portrait of John Holdren
. Office of Science and Technology Policy, official portrait, 24 April 2009. Public domain in the United States: OSTP employee’s official-duty federal-government work. Source usage terms, via Wikimedia Commons. Source. Articles by others on the same topic
John Holdren is an American scientist and policy advisor who is known for his work in the fields of environmental science, climate change, and science policy. He served as the Director of the Office of Science and Technology Policy (OSTP) in the Obama Administration from 2009 to 2017. In this role, he was instrumental in advising the President on various science and technology issues, including climate change policy.