Mr. Grabert has worked for the United Nations Climate Change Secretariat (UNFCCC) for more than 20 years. He heads the Sustainable Development Mechanisms Programme of the UNFCCC, leading the work on market-based approaches to climate change mitigation. Prior to 2006 he served as a greenhouse gas emissions specialist and worked in numerous expert groups of the United Nation's Intergovernmental Panel on Climate Change. In addition, he also currently leads the secretariat’s work on Global Climate Action in supporting Non-State-Actors’ efforts towards the Paris Agreement. Before joining the United Nations, he was an industry and regional analyst for the World Economic Forum in Geneva, Switzerland.

Mr. Grabert holds a B.A. in Economics and International Relations from Wheaton College, Masters of International Economics from the Institut de Hautes Études Internationales in Geneva, and has undertaken post-graduate studies in Management at Stanford University, University of Navarra (IESE) and London Business School, and in Development at Harvard University.