Mark has over 30 years of professional experience in the field of environmental policy and management, most of it with UNEP. Before taking up his current position Mark headed the Economy Division’s Energy and Climate Branch. Prior to that he served for several years in UNEP’s Asia and the Pacific Office, where he managed industrial environmental management projects throughout Asia. Mark is particularly interested in technology transfer and the technology needs of developing countries and was a coordinating lead author of the IPCC Special Report on Methodological and Technological Issues in Technology Transfer. Before joining UNEP Mark supported domestic and international environmental programmes with the U.S. Environmental Protection Agency and the World Bank, mostly related to the phase-out of Ozone Depleting Substances and climate change. Mark started his career as a U.S. Peace Corp Volunteer in Thailand, where he was assigned to the Local Administration Department of the Thai Government’s Ministry of Interior.

Mark received a Master of Public Policy degree with a concentration in Environmental and Energy Policy from Harvard University's Kennedy School of Government, a M.S. degree in Civil Engineering (with an environmental engineering focus) from the University of California at Berkeley, and a S.B. in Civil Engineering from MIT.