Leonardo SC Castilho focuses on human rights diplomacy, multilateral governance and international organizations. After working with human rights NGOs in his hometown of Rio de Janeiro, Mr. Castilho joined the United Nations in 2005 and has since then served the Office of the High Commissioner for Human Rights (OHCHR) and the UN Population Fund (UNFPA). He has worked for the UN in Latin America, his homecountry of Brazil, Haiti, Guatemala and Chile, but also in UN headquarters in Geneva and New York. Over the years he has particularly focused on non-discrimination, development and economic, social and cultural rights (ESCRs), including by mainstreaming human rights in the negotiations of the 2030 Agenda for Sustainable Development. He began his university studies on Law and International Relations at PUC-Rio, graduated from Sciences-Po Paris with a Master’s degree in International Development and later obtained a Master of Studies in International Human Rights Law from Oxford University. Between 2016 and 2018 he was on academic leave to work on his PhD on Political Science/International Relations, at the Graduate Institute for International and Development Studies, and spent part of this time based in Cambridge as a Fellow at the Carr Center for Human Rights Policy. He recently returned to OHCHR to work on ESCRs, particularly on the right to health, and on the draft declaration of rights of peasants and other people working in rural areas, adopted by the Human Rights Council in September 2018.