After several stations in Minnesota and Caltech, he was a student of the Fulbright program at the MAX-Lab accelerator at the Swedish University of Lund, and in 1998 became an assistant professor in University of Copenhagen.
Nach verschiedenen Stationen in Minnesota und am Caltech war er Student des Fulbright-Programms am MAX-Lab-Beschleuniger der schwedischen Universität Lund und wurde 1998 Assistenzprofessor in Kopenhagen.