Task Force 3: Environment, Energy and Sustainable Development

Sébastien Treyer is the executive director of IDDRI, since January 2019 (he joined the institute in 2010 as director of programmes). He is also chairman of the Scientific and Technical Committee of the French Global Environment Facility) and member of the Lead Faculty of the Earth System Governance Network. A graduate from École Polytechnique in Palaiseau, France, chief engineer of the Corps of Bridges, Water and Forests and Ph.D. in environmental management, he was in charge of foresight studies at the French Ministry of the Environment, and played an active role in leading the interface between science and policy and scientific programming at the European Commission, the French National Research Agency and territorial actors such as the Seine-Normandy Water Agency.

Shehnaaz Moosa’s portfolio includes oversight of SouthSouthNorth’s (SSN’s) finance, delivery and operations hubs; she is the director responsible for CDKN, VCA, CLEAN, ARA and GA LLA, among other projects. Shehnaaz is chair of the Global Resilience Partnership Board, a Global Innovation Fund Climate Advisory Board member, on the Global Transitions Programme Committee and on the Race to Resilience Measurement Advisory Group. She has deep theoretical and practical expertise in delivering complex programs addressing climate change within the African context. Social justice and equity are at the foundation of what informs Shehnaaz’s approach to program design and local and global interventions. Prior to joining SSN, Shehnaaz was a researcher and lecturer in the Department of Chemical Engineering at the University of Cape Town. She holds a B.Sc., an M.Sc. and a Ph.D. in chemical engineering. She has the dubious honour of being the first female of colour to obtain a doctorate in chemical engineering in South Africa.

Fabby Tumiwa is an energy transition strategist and the executive director of the Institute for Essential Services Reform (IESR). IESR is an Indonesian think tank on energy policy and the environment that advocates for energy transition and ambitious climate action. Fabby studied electrical engineering at Satya Wacana Christian University, Indonesia.

Fabby has more than two decades of experience in energy policy and regulation in Indonesia and Southeast Asia and is a renewable energy enthusiast. He advises Indonesian government agencies, businesses, NGOs and multilateral development organizations on electricity regulation, renewable energy and energy efficiency, energy finance, and climate change policies. From 2006 to 2018, he was a member of Indonesia’s international climate change negotiation team. He served as a board member of the Extractive Industries Transparency Initiative from 2011 to 2015 and a member of the Steering Committee of Indonesia Climate Change Trust Fund from 2014 to 2019. From 2021 to 2024, he served as the chairman of the Indonesia Solar Energy Association.

He has served as a member of the Technical Advisory Group of the Energy Sector Management Assistance Program of the World Bank since 2023. He was a member of the Energy Transition Accelerator High-Level Consultative Group, an initiative by the US State Department, The Rockefeller Foundation and the Bezos Foundation, and, since 2024, a board member of ACCESS Coalition, an international civil society coalition to expand quality energy access globally. Fabby was a 2007 LEAD fellow and 2009 Eisenhower fellow.

Biologist and environmentalist Izabella Teixeira’s career includes roles as a technical advisor for the National Secretariat of the Environment and the National Environment Council. She has held various leadership roles, including as a career employee at Ibama, and has served as deputy secretary of the environment for the State of Rio de Janeiro and executive secretary of the Ministry of the Environment. As minister of environment (2010–2016), she achieved record-low deforestation rates in the Amazon and led key environmental initiatives. She has been involved in major environmental negotiations and is currently co-chair of the UN Environment Programme (UNEP) International Resource Panel and a member of the UN Department of Economic and Social Affairs High-Level Advisory Board. She also serves on the boards of international and national institutions such as the Brazilian Center for International Relations and Instituto Arapyaú. She was a recipient of the UNEP’s Champions of the Earth award in 2013.