Adoum was Chad's Ambassador to the United States, Canada and Argentina from 1983 to 1992.
[1] During this time, he was a co-agent representing the Chadian government at the International Court of Justice in 1993 regarding his country's territorial dispute with Libya.
He was later appointed as Permanent Representative of Chad to the United Nations, presenting his credentials to the UN Secretary-General on February 15, 2005.
He has also represented Chad in Belgium, Netherlands, Luxembourg, United Kingdom and the European Community.
[4] Adoum received a diploma in education from Université de Brazzaville, a bachelor's degree in political science from Université Laval in Quebec City, and his master's degree from the School of Advanced International Studies at Johns Hopkins University in Baltimore, Maryland.