Dr Marie-Madeleine MBORANTSUO

After obtaining her Baccalauréat, série A4, in 1975, she pursued higher education and earned a Maîtrise en droit in Gabon in 1979. Her specialisation in public and constitutional law was strengthened in France with a Diplôme d’Études Approfondies (DEA) in constitutional law, public finance and taxation at Université Paris II Panthéon-Sorbonne in 1982, followed by a Doctorate in public law, awarded with the highest distinction and the jury’s congratulations, at Université d’Aix-en-Provence in 2001.

She began her career in 1979 as an Auditor at the Chamber of Accounts of the Supreme Court of Gabon. After advanced training at the French Court of Accounts and the Paris Institute of Public Administration, she was appointed Adviser to the Minister of Planning while continuing her work as a Magistrate at the Chamber of Accounts of the Supreme Court. At the same time, she taught public finance and taxation for nearly ten years at Université Omar Bongo (UOB) and the Institut de l’Économie et des Finances (IEF).

At international level, she held important responsibilities. In 1993, she was the first Vice-President of the first College of UNESCO’s International Bioethics Committee and, alongside leading scientific and legal figures, took part in drafting the Universal Declaration on the Human Genome. As a UNESCO consultant on Education, Sustainable Development and Gender, she also contributes to several international forums.

Co-founder, with Mr Roland DUMAS, of the Association of Constitutional Courts and Councils of Countries Sharing the Use of French (ACCPUF), she served as its President before being appointed Honorary President. She is also recognised for her expertise in election observation and the training of Constitutional Judges.

Dr Marie-Madeleine MBORANTSUO is also a Conciliator-Arbitrator at the International Centre for Settlement of Investment Disputes (CIRDI), an organisation of the World Bank. From 2004 to 2025, she was President of the National Commission responsible for settling the border dispute between Gabon and Equatorial Guinea under United Nations arbitration. From 2021 to 2025, she also served as Agent of the Gabonese Republic before the International Court of Justice in The Hague.