Board Members

The board is comprised of leaders who are actively engaged in guiding VCS development.


John Drexhage, Chair

John is a senior fellow with the International Institute for Sustainable Development and Ecoresources, two Canadian based organizations that address issues related to sustainable development, climate change and energy.  He is currently actively involved in the UN based post 2015 sustainable development negotiations.   Prior to that John served as the climate change and energy management director with the International Council on Mining & Metals.  He has also served as climate change and energy director for the International Institute for Sustainable Development (IISD).  Previously, John served as a senior negotiator with the Canadian government on international climate change negotiations and advised widely on regulatory systems ranging from domestic and international offset systems to carbon tax options. John brings to the board keen insight into the dynamics of international climate policy development and a dedication to linking environmental protection and economic development. 


Marc Stuart, Vice Chair

Marc is founding managing director of Allotrope Partners and an original co-founder of EcoSecurities, one of the world's largest developers of GHG reduction and removal projects. Marc brings to the board significant business development expertise and an in-depth technical understanding of the complexities of project development and the need for simplified and transparent procedures to enable large-scale investment. Marc also sits on the AFOLU steering committee.


Henry Derwent, Vice Chair

Henry is the former international climate change director for the United Kingdom. He has overseen UK delegations at international climate negotiations and G8 summits, and he has led the early development of UK carbon markets. He more recently served as president and CEO of the International Emissions Trading Association (IETA), one of the founding organizations of the VCS. Henry brings to the board valued insight into climate policies emerging worldwide.


Dirk Forrister

Dirk is president and CEO of the International Emissions Trading Association (IETA). He previously served as managing director of Natsource, as a senior official with the U.S. Department of Energy and as energy program manager at Environmental Defense Fund. He also served as Chairman of the White House Climate Change Task Force in the Clinton Administration. Dirk, an early contributor to U.S. climate change policy, brings to the VCS Board considerable skills and experience in energy policy and carbon markets.


Jennifer Haverkamp

Jennifer is a Visiting Senior Fellow at the Institute for Governance and Sustainable Development and Professorial Lecturer in Law at George Washington University Law School. She was previously the director of Environmental Defense Fund’s International Climate Program, the Assistant U.S. Trade Representative for Environment and Natural Resources, and an attorney for the U.S. Justice Department and EPA. She headed the U.S. delegation that renegotiated the International Tropical Timber Agreement, and she helped negotiate environment and labor side agreements to the North American Free Trade Agreement, NAFTA. Jennifer brings to the board her keen insights into international climate policy, synergies between sustainability and economic development, and trade negotiations.  She also serves on the AFOLU steering committee.


Nathaniel Keohane

Nathaniel Keohane is a Vice President at Environmental Defense Fund, where he leads EDF’s International Climate program and helps to shape the organization’s advocacy for environmentally effective and economically sound climate policy. Nat’s areas of expertise include U.S. and international climate and energy policy, the economic impact of climate change, the benefits and costs of reducing greenhouse gas emissions, and the design and performance of cap-and-trade programs and other policy instruments. Previously, Nat served in the Obama Administration as Special Assistant to the President for Energy and Environment in the National Economic Council and Domestic Policy Council. Before joining the Administration, he directed economic policy and analysis at EDF, playing a lead role in the efforts to enact comprehensive cap-and-trade legislation in Congress. Prior to EDF, Nat was an Associate Professor of Economics at the Yale School of Management.


Mark Kenber

Mark is CEO of The Climate Group, one of the VCS founding organizations. He brings to the board 15 years of experience on international climate policy, having served as a senior policy officer for WWF's International Climate Change Programme, as planning director for Fundacion Natura in Ecuador and as an advisor to former UK Prime Minister Tony Blair and the Ecuadorian government. Mark currently sits on the Climate Change Advisory Council at Zurich Insurance and the Institutional Investors Group on Climate Change Steering Committee. He brings to the board wide-ranging expertise in environmental economics, emissions trading and global climate policy development.


Kenneth J. Markowitz

Kenneth, an attorney, is the President of Earthpace LLC and the senior clean energy and environmental consultant to Akin Gump Strauss Hauer and Feld. He advises leading public- and private-sector clients on a comprehensive range of energy policy, law and regulatory issues in relation to economic growth, energy security and environmental stewardship, both domestically and internationally.  Areas of expertise include climate change, environmental markets, renewable fuels, energy efficiency, waste utilization, clean air, water and other environmental regulation. Mr. Markowitz serves as the Managing Director of the International Network for Environmental Compliance and Enforcement (INECE), a trans-governmental network, and as an adjunct professor at the Washington College of Law at The American University.


Ken Newcombe

Ken is CEO of C-Quest Capital and brings considerable carbon market expertise to the board. Ken led the World Bank's work to establish the Prototype Carbon Fund, the first private-public fund to make significant investments in emission-reducing projects. He went on to manage the growth of eight carbon funds and to work for Climate Change Capital and Goldman Sachs. Ken brings to the board a breadth and depth of experience with all aspects of carbon market development, ranging from precise technical questions to broad conceptual issues. He serves on the AFOLU steering committee as well as the VCS board.


Bettina von Hagen

Bettina is CEO of Ecotrust Forest Management (EFM), an investment management company and subsidiary of the non-profit Ecotrust. EFM specializes in ecological forest management for investors and land owners, producing an array of forest products and services ranging from timber to biomass to forest carbon, while also producing jobs for local communities. Previously Bettina served as vice president of Ecotrust and vice president of First Interstate Bank of Oregon. She brings to the board an in-depth understanding of the forest sector, which is critically important given the sector's growing role as a source of credible carbon credits.


Andrea Rudnick

Andrea Rudnick currently serves as the Latin America Liaison of Mitigation Action Plans and Scenarios (MAPS) Programme, where she oversees the analysis of the impacts of various policies and actions to address climate change across the region. Prior to joining the MAPS Programme, Andrea served as Head of the Climate Change Office at the Ministry of Environment of Chile where she led the Chilean delegation to the international climate change negotiations. From 2003 to 2010 she worked at Poch, one of Latin America’s leading engineering, environmental and sustainability consulting companies, starting as a Project Engineer and moving to become a Project Manager.


Tao Yun

Tao is founder and CEO of ZBX Environmental Software Company, the leader in providing infrastructure for China's carbon market. A renowned business leader within China, he was one of the youngest board members among all Chinese public companies and first elected global governor of Pacific Telecom Council from mainland China . Tao brings to the board his extensive experience in IT, telecoms, and investments in China and abroad.