Sibi Arasu has worked as a journalist for more than a decade and reports almost exclusively on issues related to the environment and climate change from India. As an independent journalist, he has written for multiple news organizations both in India and internationally. These include National Geographic, the BBC, New Internationalist, Hindustan Times, Scroll, The Wire, and Mongabay, among others. Arasu has reported on issues pertaining to extreme weather events, climate change adaptation and mitigation, industrial pollution, conservation, and conflict between people and wildlife, as well as on the rights of the Adivasi, or Indigenous people of India.

Sibongani Kayola is the country director of Mercy Corps Sudan, overseeing the delivery of high-impact, multi-sector programming with a range of projects interlinking the humanitarian, development, and peace sectors.

Sibylle Koenig is a development consultant and policy adviser with 10 years of experience in managing, monitoring and evaluating international aid programs and grant schemes, as well as advocacy. She has worked for a variety of organizations, including the European Commission, U.N. and bilateral aid agencies and NGOs in Latin America (4 years) and Europe, with extensive work travel to Africa (Tanzania, Uganda, Mozambique, Kenya, Botswana) and Asia (Cambodia, Vietnam, Thailand, India, South Korea).

Siddharth Akali is an international lawyer who has been trained by local communities, and Indigenous governments and peoples in Canada, India, and Nepal. He works as director of the Coalition for Human Rights in Development, a global coalition of social movements, civil society organizations, and grassroots groups working together to ensure that development is community-led and that it respects, protects, and fulfills human rights.

Siddhartha Basu is a policy economist at the International Growth Centre, where he works for the State Fragility initiative, with a particular focus on private sector development and the IGC's engagements in Myanmar. He was previously an IGC country economist based out of Myanmar. Prior to joining the IGC, he was an economist at Mekong Economics, a development consulting firm specializing in the monitoring and evaluation of donor-funded projects.

Sidi Ould Tah is the former president of the Arab Bank for Economic Development in Africa, or BADEA, where he led an institutional transformation that earned the bank AAA credit ratings. He previously served as Mauritania’s minister of economy and finance, representing the country on the boards of major development institutions. He holds a Ph.D. in economics and completed executive training at Harvard and the London Business School. Tah has also served on the boards of several African development finance institutions.

Sidonie Uwimpuhwe is CARE’s coordinator of the Vulnerable Women Program in Rwanda.

Sifa Ndusha is a former refugee from the Democratic Republic of Congo. She lived in a Ugandan refugee camp for four years, along with her three young children. She and her family have lived in Cincinnati, Ohio, United States since 2011. Ndusha works as an operations manager and is pursuing a Ph.D. in public administration. She is also a global health advocate and longtime champion of the UN Foundation’s United to Beat Malaria campaign and has shared her story of malaria survival on Capitol Hill numerous times.

Sigrid Kaag is the minister for foreign trade and development cooperation of the Netherlands. Previously, she served as United Nations undersecretary-general in Lebanon, U.N. undersecretary-general leading the mission to eliminate chemical weapons in Syria, assistant secretary-general for the United Nations Development Programme in New York, and UNICEF’s regional director for the Middle East and North Africa in Amman, Jordan.

Silke Staab is a research specialist at UN Women and manager of the global monitoring report Turning Promises into Action. Before joining UN Women in 2014, Silke worked for different U.N. agencies and nongovernmental organizations, including the United Nations Research Institute for Social Development and the Economic Commission for Latin America and the Caribbean. She holds a Ph.D. in politics from the University of Manchester and has published on various aspects of gender, politics, and social policy including in journals like Social Politics and Third World Quarterly. She is author of “Gender and the Politics of Gradual Change” (Palgrave 2017) and co-editor of “Global Variations in Political and Social Economy of Care” (Routledge 2013).