O tun gba PhD kan ninu eko ibaraenisoro ati ise iroyin lati Autonomous University of Barcelona, UAB, Spain.Ise re Onumah sise, o si kowe fun opolopo ile-ise iroyin ni orile-ede Naijiria bii; iwe-iroyin Sentinel, Guardian, AM News, PM News, The News/Tempo, Concord, Punch ati Thisday newspaper, ki oh to lo si Accra, ni orile-ede Ghana, ni odun 1996.. 
Awọn ipa, awọn ifiyesi, ati awọn idii lakoko ti o ni idaduro ojuṣaaju kan pato ti Afirika.. 