Our Management:


David Wortmann is the owner and managing director of the consulting agency DWR eco GmbH that he and Doreen Rietentiet founded in 2012. He has extensive expertise in fields of business development, public affairs, public relations and strategic consulting in environmental technologies, renewable energy and sustainable development. Wortmann started working in the field of clean tech and renewable energies back in 2000 and is well connected across various sectors of the industry worldwide. In politics, he worked as a research assistant in the German Bundestag for major protagonists of the energy transition such as Hermann Scheer. He supported the creation of the World Council for Renewable Energy (WCRE) in the role as Director of International Policy Affairs. In the consulting company he worked on the government side for the Industrial Investment Council as Head of Asia based in Tokyo and later for the Germany Trade and Invest (GTAI) as Head of the Energy and Environmental Technology Department. In industry, he worked for First Solar as director of strategic planning and most recently as vice president of public affairs for the EU. Thereby he accompanied the expansion of the production facility in Germany, as well as important pieces of energy legislation. David Wortmann is a frequent speaker on conferences and acted, among other things, as a visiting lecturer at the Institute for Global Leadership at Tufts University in the United States. He has published numerous technical papers in the fields of sustainable development and energy and is the managing director of the Berlin -Brandenburg Energy Network.


Doreen Rietentiet has advised the clean tech and renewable energy sector as a communications strategist since 2004. Her extensive experience and in-depth knowledge of the industry as well as her extensive network of media stakeholders worldwide makes her an invaluable asset to DWR eco. She has specialized in the development and implementation of media strategies, campaigns and content in the field of clean tech, sustainability and start-ups. Before entering the clean teach sector, Doreen Rietentiet has worked as an international journalist in the United States, Great Britain and Japan. For more than a decade, she covered two presidential elections, the UN Millennium Summit, 9/11 and many other stories of international relevance for media organizations, such as CNN International, German ARD, ITN and the European Broadcast Union. She. After returning to Berlin in 2005, Rietentiet was hired to produce Sabine Christiansen’s English-language program “Global Players” for CNBC. In 2005 she was asked to establish the German Renewable Energies Agency, where she worked closely with former UNEP Director Klaus Töpfer. Doreen Rietentiet also oversees the global PR strategy and outreach work of the Falling Walls Foundation and helps industry associations and companies like Hermes with their sustainability strategy.


Wolf Soellner is the Executive Assistant at DWR eco. In addition to providing administrative and organizational support to the CEO and to the advisory team, Soellner is also responsible for office management, staff-, and event management. Previously, he gained professional experience in communications with a well-known German air carrier and at a berlin-based software startup that received several awards. Wolf Söllner is currently working on his Master’s thesis in North American Studies with the focus on politics and economics at the Free University of Berlin.

Our Senior-Advisors:


Hans-Josef Fell is a Senior Advisor at DWR eco and President of the Energy Watch Group (EWG). From 1998 to 2013, he was a Member of the German Bundestag. As author of the Renewable Energy Act (EEG), he laid the foundation for the internationally acclaimed German energy transition. Fell also contributed extensively to the improvement of framework conditions for renewable energies at both the European and global level. His expertise makes him an internationally sought after speaker at congresses and conferences on energy issues.

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Angelina Galiteva works to structure and advance the implementation of cutting edge energy policies that reflect the increasing role of renewable energy, storage, mobility and distributed energy technologies worldwide. She is founder and Chair of the Board for the Renewables 100 Policy Institute and also serves as an Expert Renewable Energy Speaker for the US Departments of States. She has been sent on numerous missions around the world in this expert capacity. Angelina Galiteva’s industry experiences spans from serving as a Principal at NEOptions, Inc., a renewable energy and new technology product design firm to the utility sector where she worked as the Executive Director of the Los Angeles Department of Water and Power as well as the New York Power Authority. Angelina Galiteva is an attorney and holds a J.D. and LLM Degrees, specializing in Environmental and Energy Law.


As Senior Advisor for DWR eco in Brussels, Ludovica Gambone manages clients in the energy, environmental, and sustainability sectors. She has a decade of professional experience in the political operations of the European Union as staffer in the office of a Member of the European Parliament and Manager at the internationally active agency Burson-Marsteller. Since joining DWR eco, she has successfully supervised a variety of European and international campaigns and advised clients on strategic issues. Gambone studied law at the University of Buenos Aires and the University of Louvain (Belgium) and speaks English, French, Spanish, and Portuguese in addition to Italian.


As a Senior Advisor at DWR eco, Andrea Hötzeldt is our expert for entrepreneurship and start-ups. Prior to joining DWR eco in April 2014, Hötzeldt worked at several Berlin communications agencies and at the European Parliament. She studied Political Science at the Free University of Berlin and worked after graduating at a social science institute in Berlin where she was responsible for European Commission research projects.


Ralf Hengherr’s specialty as Senior Advisor is technical and strategic consulting. He has expertise in project development in the renewable energies, energy simulation, and system design and analysis sectors, among others. Prior to joining DWR eco, Hengherr worked many years as a project developer in the real estate industry, in the editorial offices of energy-sector media, and on various EU projects.


Benjamin Winter heads up public affairs at DWR eco, being the key liaison with associations and policymakers on the subject of clean tech, circular economy and clean tech. Before joining the team, Winter worked four years as Speaker in the offices of various Members of the German Bundestag. He has in-depth knowledge of parliamentary processes, several years of experience working with media and associations, and specialist expertise in energy, climate, and environmental policy in Germany and the EU. After gaining his degree in European Studies from the University of Hamburg, Winter completed a traineeship in press and public relations at the head office of Alliance ’90/The Greens.

Our Advisors:


Jakob Medick is an Analyst at DWR eco, working primarily on the analysis of political and economic framework conditions for renewable energies and sustainable technologies. His current focus is on issues related to the further development of the German and European electricity markets. He’s also active in strategy development and the coordination of internal processes at DWR eco. While still a master’s student in Agroeconomics, Medick gained experience in energy policy consulting at the German Institute for Economic Research (DIW) in Berlin and at an international agency.


Jessica Schulz is a Public Relations Advisor at DWR eco, developing communications strategies for various clients in the energy and environmental sectors. Before joining DWR eco, Jessica Schulz gained experience in the communications departments of an international recycling company and an environmental award-granting organization. Prior to that, she worked as an intern at the Heinrich Böll Foundation and in the office of a Member of the German Bundestag from Alliance ’90/The Greens. She received her master’s degree in Media from the Technical University of Berlin after completing a bachelor’s degree in Communication and Media Science at the Leipzig University.


Charlotte Hornung is a Public Affairs Consultant at DWR eco and is responsible for the implementation of political communication strategies at the federal and EU level. She is currently engaged in projects in the energy innovation, energy efficiency and circular economy sectors. Before joining DWR eco, she gained experience in the EU Public Affairs office of a company in the mobility industry as well as at an international PR and PA agency in Berlin. Charlotte Hornung graduated with a Dual Masters of Public Affairs and Public Policy from Sciences Po Paris and Hertie School of Governance in Berlin and holds a Bachelor in European Studies from Maastricht University.


As public relations Advisor at DWR eco, Nora Maria Zaremba develops communications strategies for a range of clients in the energy and environmental sectors. Prior to joining DWR eco in July 2015, Zaremba worked in the press and public relations department of a climate policy foundation. She has deep knowledge of energy and environmental policy as well as media relations in the field. As a freelance journalist, Zaremba writes for various publications. While studying Political, Economic, and Environmental Science in Bonn and Bayreuth, she worked for the Westdeutscher Rundfunk, among others.


Marie Niggemeier works as a Project Assistant at DWR eco while simultaneously completing her studies in Management of Renewable Energies at Weihenstephan-Triesdorf University, where she is in her sixth semester. At DWR eco, she researches and analyzes energy policy and economic issues as well as drafting texts, background reports, and newsletters on the energy sector and renewable energies. Her core competence is renewable energy legislation, with a particular focus on biomass. Prior to joining DWR eco, Niggemeier was responsible for the social media campaign of a company.


Siglinde Svilengatyin is an Associate at DWR eco for public relations and public affairs. She researches and analyzes topics of energy policy and economics, compiles background reports and newsletters, and accompanies strategies for corporate communication. Prior to DWR eco, Siglinde Svilengatyin gained experience in the public affairs department of a Berlin communication agency, in the press department of a German-speaking theater abroad and previously as an intern at the Romanian Embassy in Berlin and at the Gesellschaft für Internationale Zusammenarbeit (GIZ). She completed her master’s degree in political science at the Freie Universität Berlin and is currently studying a MBA in Sustainability Management.

Employees of our projects:


Komila Nabiyeva is since the end of 2014 project manager at the Energy Watch Group (EWG) (www.energywatchgroup.org). The EWG is an international network of scientists and parliamentarians, providing independent scientific studies on global energy issues. After her master’s degree in European studies, Komila Nabiyeva was communication consultant and trainer at the UN among others. She also writes as a freelance journalist on climate and energy issues.


As Project Assistant to the Energy Watch Group (EWG), Ralph Tigges assists public relations and event management as editor and copy writer for e- mail newsletters, the EWG website and social media. He also monitors relevant developments in the renewable energy sector as well as divestment in the international press. Ralph Tigges recently graduated from the University of Vienna as Master of Environmental Science.


As Networking Associate to the Berlin Brandenburg Energy Network (BEN), Jenny Haberer manages the organization’s networking platform and supports the BEN member companies in realizing the transition towards clean, renewable energy in the Berlin-Brandenburg region. Previously, Jenny Haberer gained experience as project manager for renewable energy at a consulting agency and studied International Marketing and Global Communication in Berlin, Cambridge and Ahmedabad (India). The resulting research paper „Megacities and Sustainability in India“ was funded by the German Ministry for Migration and Refugees.

Our support:


Jan Wilms works as a freelance Creative Consultant and Copywriter for DWR eco. His areas of expertise include conceptual design, copywriting, editing, and creative direction for brand magazines as well as the production of company films and consulting in the automotive and mobility sectors. As a freelance journalist, he writes for the technology and motor sections of the Süddeutsche Zeitung, Neue Zürcher Zeitung, Die Welt, neue energie, Automobilrevue, Die Presse, Tagesanzeiger, and others. Wilms also works as a freelance copywriter, creative director, and consultant for Joschka Fischer & Company, smart, Mercedes-Benz, BMW, Audi, Volkswagen, Mazda, Renault, Toyota, Hyundai, MAN, Setra, Germanwings, Roland Berger Strategy Consultants, PwC, Air Liquide, voestalpine, and others.


Mike Mühlberger works as a Media Coach and Video Producer for DWR eco. As a bilingual TV and radio journalist, he has years of experience producing news pieces, magazine articles, and reportages for German, British, and North American media. For ten years, he’s worked as a media and crisis communications coach for international companies and organizations. Mühlberger specializes in energy and security policy and has trained, individually and in groups, more than 100 international specialists and managers how to deal with the media. He also develops and produces different video formats to implement social media strategies.