Organization Royal Navy Volunteer Reserve

British Academy

University of Liverpool

University of Birmingham

Harvard University

Trinity College, Dublin

University of Essex

Inner Temple (called to the bar | 1938)

Foreign Office (legal adviser | member of UK delegation to the UN | 1948-1950)

International Monetary Fund (general counsel | 1955-1960)

All Souls College, Oxford (fellow | 1961-1969)

European Commission for Human Rights (member | 1962-1984 | president | 1972-1981)

Royal Institute of International Affairs (director of studies | 1969-1973)

King's College London (professor of international law | 1976-1980)