Director, Trade Division, Economic Commission for Europe since 1974. Deputy Director, Division of Technology, Economic Commission for Europe, Geneva, 1970-1974. Editor, Economic Survey of Europe, Rch Division, Economic Commission for Europe, Geneva, 1960-1970.
President, Centre for Rch in International Institutions, University of Geneva, since 1985. Visiting Professor (Comparative Economic Systems), Graduate Institute of International Studies, Geneva, 1963-1972. Rch Fellow, Department of Applied Economic, University of Glasgow, Scotland, 1956-1959.