 In January 1993, following President Pascal Lissouba's dissolution of the National Assembly, Mbemba became President of the National Commission for the Organization of the Early Legislative Election.He was re-elected to the National Assembly as the UP candidate in Ignié constituency in the mid-1993 parliamentary election.Following the June–October 1997 civil war, in which Lissouba was ousted, Mbemba was appointed as Minister of Labour and Social Security by President Denis Sassou Nguesso on 2 November 1997.