After undertaking post-doctoral research at Georgetown University and the Max-Planck-Institute in Heidelberg Andreas R. Ziegler taught European Union Law, international trade law and environmental law at the Chicago Kent College of Law in Chicago, the University of Pittsburgh and the University of St. Gallen. Besides being a full professor at the University of Lausanne, he is also a visiting professor at universities around the world.
For several years he worked in practice for the Swiss Government, the European Commission, in the Secretariat of the European Free Trade Association and in a law firm in Zurich on trade and investment issues. In this function he negotiated many multilateral and bilateral agreements and was also a delegate to the WTO, UNCTAD, the OECD, the Energy Charter and other international organizations.
He is on the WTO’s roster of official panellists as well as on the list of conciliators of the International Centre for the Settlement of Investment Disputes (ICSID). He is the Academic Director of the LLM Program in International and European Economic and Commercial Law at the University of Lausanne and a Deputy Director of the NCCR Trade based at the World Trade Institute of the University of Berne.