H.E. Annan Cato joined the Ghana Foreign Service in 1964 and served as a diplomat for over forty years. He has served in different capacities in Ghana's diplomatic missions abroad, including as High Commissioner to Canada, High Commissioner to the Court of St. James in London, Ambassador to Ireland, Deputy Permanent Representative to the UN Offices in Geneva, and Minister Counsellor to the United Nations in New York. He has also served as Chief Director of the Ministry of Foreign Affairs, Director of State Protocol and Secretary to the Cabinet.
He has a Bachelor of Arts degree in History from the University of Ghana and a Master of Arts in Administration and Diplomacy from the Ghana Institute of Management and Public Administration (GIMPA). He is a product of Achimota School.
For his outstanding public service to Ghana, the State Award of Companion of the Order of the Volta, Ghana's highest civilian award, was conferred on him. He is also a holder of the Award of the Freedom of the City of London.