As a career diplomat, he has spent his entire professional life in public service, combining national duties with assignments received from various international communities.

He has held several high-ranking positions, including Deputy State Secretary in charge of security policy, multilateral diplomacy and human rights; Vice-President of the UN General Assembly (2011-12); State Secretary for Environmental Sustainability, Office of the President of Hungary (2015-2022).

As Director (State Secretary) of the Office of the President of Hungary, he was involved in the High-level Panel on Water, co-convened by the Secretary-General and the President of the World Bank Group; in the Water and Climate Leaders Panel, co-convened by the Secretary-General of the World Meteorological Organization and the President of UN-Water.

He was co-chair of the UN intergovernmental process (Open Working Group of the General Assembly on Sustainable Development Goals) tasked with producing the 2030 Agenda for Sustainable Development and the Sustainable Development Goals at its heart.

He is a founding member of the Hungarian Scientific Panel on Climate Change, a member the Presidential Committee on Sustainable Development at the Hungarian Academy of Sciences.

Csaba Kőrösi is Distinguished Fellow of the Japan International Cooperation Agency Ogata Sadako Research Institute, Fellow of the International Research Center of Big Data for Sustainable Development Goals, Chinese Academy of Sciences, and Honorary Fellow of the International Science Council.