[2] After a brief stint as Deputy Secretary-General of the Presidency, Mpouma served as President–Director-General of the National Investment Corporation (SNI) for about six months[5] before being appointed to the government as Minister of Industrial and Commercial Development on 12 June 1970.
[2][6][7] As President of the Union of Palm Oil Producers (Union des exploitants du palmier à huile du Cameroun, UNEXPALM), Mpouma discussed the problem of palm oil scarcity in an interview with Cameroon Tribune on 22 September 2003.
He said that internal demand had exceeded supply for various reasons, including aging plantations, but that his union hoped to solve the shortage by focusing on small-scale production.
[9] Speaking to Cameroon Tribune again in November 2005, Mpouma addressed concerns that the price of palm oil would increase during the holidays, saying that would not occur.
[10] Palm oil production in Cameroon for 2007 surpassed government expectations by 18%, rising to 200,000 metric tons.