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He has over 4 decades of work experience in the areas of energy, environment, climate change and sustainable development. Before taking up his current assignment he was UN Assistant Secretary-General for Climate Change in New York under Secretary-General Ban Ki-moon.
Previously, he was Acting Executive Director for Conservation (2014) and Policy and Science Director (2012-2014) at WWF-International. Pasztor directed the UNSG’s Climate Change Support Team (2008-2010) and later was Executive Secretary of the UNSG’s High-level Panel on Global Sustainability (2010-2012). In 2007 he directed the Geneva-based UN Environment Management Group (EMG). During 1993-2006 he worked, and over time held different responsibilities at the Climate Change Secretariat (UNFCCC), initially in Geneva, Switzerland and later in Bonn, Germany.
Other assignments included: in the Secretariat of the 1992 UN Conference on Environment and Development (Earth Summit ’92); Stockholm Environment Institute; United Nations Environment Programme (UNEP); Secretariat of the World Commission on Environment and Development (Brundtland Commission); the Beijer Institute; and the World Council of Churches.
Janos has BSc and MSc degrees in Nuclear Engineering from the Massachusetts Institute of Technology (MIT).

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