Stefan Schäfer leads the research group on Climate Engineering at Science, Society and Politics at IASS Potsdam. His research draws on approaches from science and technology studies (STS) to examine questions at the intersection of democracy, sustainability and global governance, with a focus on climate science and politics in general and climate engineering in particular. He holds fellowships with the Science, Technology and Society Program at Harvard University and with the Institute for Science, Innovation and Society at the University of Oxford. He was a Visiting Fellow at Harvard University in 2018 and at the University of Oxford in 2017, a guest researcher at the Social Science Research Center Berlin (WZB) from 2009-2012, a fellow of the Robert Bosch Foundation's Global Governance Futures program in 2014 -2015, and has spent research stays at University College London (2013) and Harvard University (2015 and 2016). He is a contributing author to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), lead author of the European Transdisciplinary Assessment of Climate Engineering (EuTRACE) report, and chaired the Steering Committee of Climate Engineering Conferences in 2014 and 2017 In 2018-2019, he is a Special Adviser to the European Commission.