He founded his architectural practice, G2A, in Yaoundé in 1984 and served as president of the African Union of Architects from 2003 to 2008. To better serve the architectural education of Cameroonians, Jean-Jacques created the ESSACA (Ecole Sup�rieure Sp�ciale d'Architecture du Cameroun) in 2009. The ESSACA allows students to get an architectural education at an international standard within Cameroon.