 An ethnic Mbochi and a member of the Gamboma clan, Itoua was born in Pointe-Noire but was considered a native of Cuvette Department.He graduated from the "École spéciale des travaux publics", a French civil engineering school in Paris, in 1982.During the 1980s, he worked in Congo-Brazzaville at the National Electricity Company and subsequently at the subsidiary oil company Elf-Congo.