Senior Urbanist of the Planning Agency for the Paris Metropolitan Region, and advisor for metropolitan & city governments on strategic planning and large transformative projects. Currently leading the Metropolitan Avenues programme on highway transformation in the Grand Paris, drawing on experience from New York, Seoul and other cities. He chairs the METREX “From Roads to Streets” expert group working with Eurocities City Fringe Regeneration and Urbact RiConnect. Also steers the Metropolitan Nature pilot projects programme in the Paris Region. He has been involved in city design and planning expertise in Europe, North and South America, North Africa, the Middle East and China. He was a member of the International Advisory Board for the 4th New York Regional Plan (2014-2016), and a Coordinator for Metropolis, the global network of cities (1999-2002). He teaches Strategic and Tactical Planning at Sciences Po Urban School, Paris. He has contributed to books, films and research publications, including Large-Scale Urban Development in Europe (2007) and Cities Change the World published in December 2019.