András Simonyi (born 16 May 1952) is a former Hungarian ambassador, transportation economist, author. He is an independent consultant living in the U.S. He is a senior fellow at the Global Energy Center Atlantic Council of the United States. He is also associated with the George Washington University, Washington D.C. From 2012 to 2018 he was the managing director of the Center for Transatlantic Relations at the Paul Nitze School of Advanced International Studies at Johns Hopkins University in Washington DC. He was the Hungarian ambassador to the United States between 2002 and 2007. He was also Hungary's first ambassador to the North Atlantic Treaty Organization. His professional focus today is energy security, the role of the private sector in energy transition.