Munonye spent three years as the head of the Advanced Teacher Training College, Owerri, retiring in 1972 (he would also give his last public lecture there, entitled "The Last To Go"). He worked for the Nigerian Ministry of Education until 1977, leaving to teach and devote more time to writing.
Munonye's tenure as the head of the Advanced Teacher Training College, Owerri, lasted for three years before his retirement in 1972. He also delivered his final public address there, titled "The Last To Go." Following his work at the Nigerian Ministry of Education until 1977, he shifted his focus to teaching and writing.