Senior Fellow of the Oxford Martin School at the University of Oxford. He also serves as Chair of the Hamburg Sustainability Conference. A Brazilian-German National, he completed his two terms as UN Under-Secretary General and Administrator of the United Nations Development Group (2017–2025) and vice-chair of United Nations Sustainable Development Group in June 2025. Before joining UNDP, he was Executive Director of the United Nations Environment Programme UNEP (2006–2016), and Director/Professorial Fellow of the Oxford Martin School (2016–2017). He has also served as Director General of the International Union for Conservation of Nature (IUCN) and Secretary General of the World Commission on Dams.