He is currently professor of international investment and trade law at Uppsala University in Sweden. He teaches and researches in the areas of international economic law, esp. international investment law, EU law and German public law. He is also faculty at the University of Southern Denmark and adjunct faculty at Humboldt-Universität zu Berlin and Technical University Berlin. He is senior fellow at the Walter Hallstein Institute of European Constitutional Law at Humboldt-Universität zu Berlin and academic advisor to the International Investment Law Centre Cologne (IILCC). Previously, he was guest professor at, among others, the University of Uppsala as a Riksbankens Jubileumsfond – Alexander von Humboldt Stiftung Swedish Prize Laureate, at Nagoya University, Bocconi University Milan, the University of Lausanne, the Charles University Prague, the Moscow State Institute of International Relations (MGIMO), and the Turkish-German University Istanbul. He serves at the ICSID Panel of Conciliators designated by the Federal Republic of Germany for the term 2019-2025.