Inoni is an Anglophone[3] and a member of the Bakweri ethnic group. He was born in the village of Bakingili, near Limbé, in the Southwest Province.[1][2] Prior to becoming prime minister, he was named Secretary of State for Finances on April 9, 1992 and then Deputy Secretary General to the Presidency on November 27, 1992,[1][2] serving in the latter position until his appointment as Prime Minister.[1]
Inoni is a member of the Central Committee of the RDPC.[5] He was part of the campaign team for Biya's election campaign in the 2004 presidential election and was the president of the campaign's support committee in the Southwest Province.[6]