He has been a faculty member at the University of Illinois , Urbana-Champaign and , from 1985 until 1995 , professor at Institut des Hautes Études Scientifiques at Bures-sur-Yvette in France , and since 1994 at the Institute for Advanced Study in Princeton , New Jersey .
He was a professor at University of Illinois , Urbana-Champaign and Institut des Hautes Études Scientifiques at Bures-sur-Yvette in France . Since 1994 he has worked at the Institute for Advanced Study in Princeton , New Jersey .