The Team

Meet our scientific board and staff

The Energy Watch Group is characterized by an interdisciplinary team and board featuring leading experts in energy and climate politics, economics, policy advocacy and communications. In our work, we draw on long-standing professional experience in politics and science, and complement our competencies with highly qualified project partners. Our team collaborates digitally and from our office in Berlin Mitte.

Executive Board

Hans-Josef Fell

Hans-Josef Fell

President of the Energy Watch Group
Together with a group of parliamentarians and scientists, Hans-Josef Fell initiated the Energy Watch Group in 2006, and has since served as its president. He sets the organization’s strategic direction, and utilizes his vast expertise in energy and climate politics to foster political dialogue and public discourse. Hans-Josef Fell was a member of German Parliament for the Green Party from 1998 to 2013 and drafted the 2000 Renewable Energy Sources Act (EEG), the foundation for the expansion of renewable energy in Germany and worldwide. Until today, the law has been replicated over 100 times around the globe and can be seen as the legal prototype for the global rollout of renewables.
Hans-Josef Fell holds academic degrees in physics and physical education at the teaching level. He was awarded with multiple prizes and awards, such as the Lui Che Woo Prize for his lifetime achievement in environmental and climate policy, the order of merit of the Federal Republic of Germany, and Nuclear-Free Future Award, and many more.
DWR-eco Team

Doreen Rietentiet

Managing Director
Doreen Rietentiet co-founded the Global Energy Transition gGmbH, the non-profit organization parenting the Energy Watch Group, and serves as its managing director. She has been working in the climate tech and renewables industry for the past 15 years, helping corporations and organisations with brand, positioning and strategic communication. Before joining the energy and climate tech sector, Doreen Rietentiet has worked as a broadcast journalist for more than a decade for various TV networks, like the German ARD, CNN and others. She is the co-founder of the climate and cleantech advisory DWR eco, and co-initiated Leaders for Climate Action as well as Entrepreneurs for future. Doreen Rietentiet holds Bachelor’s degrees in Business Administration from Humboldt University Berlin and in Marketing Design from Parsons School of Design, and a Master’s degree in International Relations from the University of London.
DWR-eco Team

David Wortmann

Member of the Board
David Wortmann strategically advises the Energy Watch Group, drawing on substantial experience in climate politics and strategic communications. He helped prepare the foundation of the International Renewable Energy Agency (IRENA) and looks back at many years of political work, including as a research assistant in the German Bundestag. He is founder of several companies and initiatives in the field of renewable energy and climate protection. For more than 20 years, he has been politically, entrepreneurially and communicatively committed to the scaling of technologies and business models for the ecological transformation of the economy. David Wortmann has studied International Business and Politics at the University of Passau (Germany), University of Córdoba (Spain), and University of Cardiff (UK).

Our Scientific Board

DWR-eco Team

Prof. Dr. Christian Breyer

Chairman of the Scientific Board
Prof. Dr. Christian Breyer is a Professor for Solar Economy at Lappeenranta University of Technology in Finnland. His major expertise is the integrated research of technological and economic characteristics of renewable energy systems, energy system modeling and 100 % renewable energy scenarios. Previously he was a managing director of the Reiner Lemoine Institute, Berlin. Christian Breyer holds a doctorate in the field of economics of hybrid PV power plants and authored and co-authored about 90 scientific publications.
DWR-eco Team

Prof. Dr. Claudia Kemfert

Chairman of the Scientific Board
Prof. Dr. Claudia Kemfert is a Professor of Energy Economics and Sustainability at Hertie School of Governance in Berlin and Head of the department Energy, Transportation, Environment at the German Institute of Economic Research (DIW Berlin). Her research activities concentrate on the evaluation of climate and energy policy strategies. Claudia Kemfert advised EU president José Manuel Barroso in a “High level Group on Energy and Climate”, and acts as an external expert for the Intergovernmental Panel of Climate Change (IPCC).



Sophie Marquitan

Sophie Marquitan is the poject lead and partnerships manager at the Energy Watch Group and develops synergies for joint impact with strategic partners such as funders and NGOs. She draws on 6 years of work experience in international business development and communications in the non-profit sphere. Strongly engaged in climate activism and politics, her passion lies in advocating for global climate justice. Previously to her role at EWG, she has driven the development of the social start-ups Kiron Open Higher Education, Ipso Psychosocial Counseling, and mTOMADY (Charité Berlin).
Sophie Marquitan obtained a Bachelor of Arts in Social Science from the University of Siegen and University of Technology, Sydney, and a Master of Science in International Business from Maastricht University.

Michelle Reuter

Policy Officer
As the policy officer at the Energy Watch Group, Michelle Reuter helps to coordinate and oversee the successful operation of the Energy Watch Group. In her view, climate and development issues are strongly interrelated – a fact that highly motivates her to promote renewable energies and climate justice around the globe. As part of that, she has written her Master thesis on Smart Meter-based business models in the electricity sector and its impact on the German energy transition. Prior to her role at the EWG, she has worked in different areas of the development and energy sector, such as for adelphi’s Climate Diplomacy & Security programme, in the East African microfinance sector, and Germanwatch’s climate policy team. Michelle obtained a Bachelor of Arts in International Economics and Development from the University of Bayreuth and Stellenbosch University, South Africa, as well as a Master of Arts in Sustainability Economics and Management from the Oldenburg University.
DWR-eco Team

Dr. Thure Traber

Dr. Thure Traber conducts scientific research and oversees the scientific content of EWG publications. He brings more than 15 years of expertise in sustainable energy modelling and policy analysis and contributes to applied research for projects that enable the path to 100% renewable energy worldwide. In particular, his research includes impact analysis of renewable energy as well as enabling technologies such as energy storage and hydrogen conversion, and estimation of climate change costs and damages. Another focus is the research of regulatory frameworks to enforce climate-friendly development. Thure previously worked at the Universities of Stuttgart and Kiel and led research teams at the German Institute for Economic Research (DIW) and the Technical University of Denmark. He received his PhD in 2007 on interactions of emissions trading with other climate policy instruments. Thure Traber's work has been published in books, studies and various journals, including Climate Change Economics, Energy Economics, Utilities Policy and Energy Policy.
Website Fotos

Dr. Christoph Gerhards

Dr. Christoph Gerhards conducts research in the field of negative emission technologies and energy system modelling. He is responsible for coordinating the research project "Back to the Holocene climate". In this project we are investigating pathways to more ambitious climate targets than those of the Paris Agreement. Christoph has more than 15 years of experience in the PV industry in various positions. After his PhD on industrial solar cells, he worked at Q-Cells SE to set up the first production lines and implement new technologies into production. Later he worked independently in the field of energy efficient and ecological buildings. In recent years, he has returned to research with a focus on the nature-friendly expansion of renewable energy. In addition, he is also very interested in the conversion of industry to zero emissions.

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