He has, since 2012, served as Principal Adviser to Directorate General for Climate Action in the European Commission, where his work focuses on the international aspects of European climate policy.  His responsibilities include leading aspects of the European Union negotiations under the Paris Agreement and the UN Framework Convention on Climate Change, and advising the Commission with regard to international partnerships to reduce greenhouse gas emissions, including under the Montreal Protocol on Ozone Depleting Substances and the International Civil Aviation Organization. He supports the Commissioner responsible for European climate change policy and the European External Action Service in strengthening bilateral relationships between the EU and major economies, including the United States, China and India and other international partners.

Werksman is an international lawyer, specializing in international environmental law and international economic law.  He has provided legal and policy advice to developed and developing country governments, NGOs and international institutions in the context of the multilateral negotiations on climate change, biosafety and trade.  He has taught and published widely on the international legal dimensions of climate policy, including on the design of compliance mechanisms, climate finance and on the relationship between carbon markets and international trade and investment agreements. 

Prior to joining the Commission, he held posts at the World Resources Institute, the Rockefeller Foundation, United Nations Development Programme, and the Foundation for International Environmental Law and Development (FIELD) in London. 

Her research explores environmental and social movements, and how global rules are made and remade. Her publications in Global Environmental Politics, Global Policy, Third World Quarterly, and Environmental Politics further contribute to scholarship on NGO influence and state-based negotiations in global environmental politics. Recent publications stemmed from her postdoc at Carleton University as part of the Valuing Nature project. Her research employs a range of methods, such as participant observation, social network analysis, and interviews. 

She is a Strategic Advisor and Team Leader for the Earth Negotiations Bulletin – the de facto record of global environmental negotiations. Since 2011, she have attended dozens of UN conferences where states negotiate the rules of global climate governance, as well as chemicals and wastes management.

She received her PhD from the University of British Columbia in May 2017. The dissertation was based on a unique database on NGO participation in the UN climate change negotiations. Before beginning her PhD, she worked as a Project Manager for the Clean Air Strategic Alliance in Alberta, mediating consensus among representatives from business, government, and NGOs. She was a Project Assistant for a global forest project at the global conservation NGO IUCN 2005-2006 in Bangkok. Her MA is in International Development and Politics from the University of Guelph.

Prof. Dr. Sebastian Oberthür is the Co-Director of the Research Centre for Environment, Economy and Energy, and Professor for Environment and Sustainable Development at the Brussels School of Governance (BSoG). He is also Professor of Environmental Policy and Law at the Centre for Climate Change, Energy and Environmental Law at the University of Eastern Finland.

He has extensive expertise on European and international environmental governance, policy and law, including climate governance, with an emphasis on institutional issues and perspectives.