Career
Later he was Foreign Minister of Nigeria from July 2003 to June 2006, then Internal Affairs Minister from 21 June 2006 to May 2007. Adeniji has a degree in History. He joined the Nigerian Foreign Service in July 1960.
He served in the Ministry of Foreign Affairs and Nigerian embassies in Washington, District of Columbia, Freetown, Sierra Leone, and Accra, Ghana.
He retired from service in 1991 after serving as the Director-General of the ministry of foreign affairs Foreign five years he was the Nigerian Ambassador to France.
He was the United Nations Secretary-General"s Special Representative for the United Nations Mission in the Central African Republic (MINURCA). The mission was responsible for providing security in Bangui and for coordinating the legislative and presidential elections held in 1998 and 1999.
He was then appointed the United Nations Secretary General"s Special Representative for Sierra Leone and Head of the United Nations Mission in Sierra Leone (UNAMSIL).
He was appointed Minister of Foreign Affairs in July 2003. Beginning in early March 2008, he was heading negotiations in Kenya related to that country"s political crisis, following the departure of the previous head negotiator, Kofi Annan.