| 1988 | Bachelor of Arts, Political Science, German, French, Italian, Indiana University, Bloomington, IN
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| 1992 | Master of Arts: International Affairs, American University, Washington, D.C
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| 1994-1998 | Coordinator, US Climate Action Network, Washington, D.C.
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| 1998-2006 | Director, Global Climate Campaign, WWF - Worldwide Fund for Nature, Washington D.C.; Berlin
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| 2006-2009 | Director, Global Climate Program, E3G - Third Generation Environmentalism, London
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| 2009-2016 | Global Director, Climate Program, World Resources Institute, Washington D.C.; Berlin
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| since 2016 | Executive Director, Greenpeace International, Amsterdam |
| 2009-2012 | Guest Researcher, Transnational Conflicts and International Institutions, WZB - Berlin Social Science Center
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| 2012-2013 | Project Scientist, IASS - Institute for Advanced Sustainability Studies, Potsdam
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| 2013-2015 | Academic Officer and Co-Leader, Interdisciplinary Research Microcosm on Climate Engineering, IASS
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| since 2015 | Program Leader, Emerging Technologies and Social Transformations in the Anthropocene, IASS
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| 2017 | Oxford Martin Visiting Fellow, InSIS - Institute for Science, Innovation and Society, University of Oxford
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| since 2017 | Research Group Leader, Climate Engineering in Science, Society and Politics, IASS |
| 2002 | Joint BA in Environmental Science and Public Policy, and Economics Harvard University, Cambridge, MA
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| 2003 | MA in Economics, Stanford University, CA
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| 2006 | MA in Economy and Government, Harvard University, Cambridge, MA
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| 2007 | PhD in Political Economy and Government, Harvard University, Cambridge, MA
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| 2007 | Leader Writer Team, Peter Martin Fellow, Financial Times, London
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| 2007-2008 | Consultant, The Boston Consulting Group, New York
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| 2011-2012 | Adjunct Assistant Professor, Columbia University, New York
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| 2012-2016 | Adjunct Associate Professor, Columbia University, New York
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| 2016 | Adjunct Associate Professor, Leonard N. Stern School of Business, New York University
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| 2008-2013 | Economist, Environmental Defense Fund New York, New York and Boston, MA
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| 2013-2014 | Senior Economist, Environmental Defense Fund New York, New York and Boston, MA
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| 2014-2016 | Lead Senior Economist, Environmental Defense Fund New York, New York and Boston, MA
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| since 2016 | Research Associate and Lecturer, Harvard University, Cambridge, MA |
