Boubacar became regional treasurer in Nouadhibou in April 1983 and then technical adviser to the Minister of Finance and Trade in November 1983. In March 1984 he became Treasurer General of Mauritania. Subsequently, during the rule of Maaouya Ould Sid'Ahmed Taya, he became Director of the Supervision of Publicly Owned Establishments in 1985, Director of the Budget in 1986, and Controller General of Finances in 1987. He became Director of the Plan in December 1987, then Director of the Treasury and Public Accounts in April 1988.[1]
Like the members of Military Council for Justice and Democracy, Boubacar was not allowed to run for president in the March 2007 Presidential election.[5] Following the election and the confirmation of the results by the Constitutional Council, Boubacar submitted his resignation to Vall on March 31; he was asked to remain in office in a caretaker capacity until the swearing in of the new president, Sidi Ould Cheikh Abdellahi, on April 19,[6][7] after which Abdallahi appointed Zeine Ould Zeidane as prime minister on April 20.[8]