 First Nigerian Chief Representative in Washington DC, U.S.A., 1959-60.Nigeria’s Chief Delegate and Chief Negotiator to the United Nations Disarmament Conference in Geneva, 1963–65

Nigeria’s Chief Delegate and Vice-President of the International Parliamentary Union (IPU), 1960–66

President of the Juridical and Parliamentary Committee of the IPU, 1962–66

Chief Delegate to the United Nations Conference on Diplomatic Privileges and Intercourse in Vienna, Austria, 1961–63

Chief Delegate to the International Civil Aviation Organisation Conference (ICAO), Tokyo, 1964

Leader, Nigerian Delegation to the Commonwealth Parliamentary Association Conference, Canada 1963 and Jamaica, 1964

Signatory to the U.N. Convention banning Chemical Weapons, Paris, 1993 – having attended its very first sitting in 1963 as Special Assistant (Foreign Affairs) to Prime Minister Tafawa Balewa

Nigerian Ambassador to Germany, 1998–99

OAU assignments