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 held a position as the head of the Advanced Teacher Training College, Owerri, for three years before retiring in 1972. He also gave his final public presentation there, titled "The Last To Go." After working at the Nigerian Ministry of Education until 1977, he shifted to teaching and devoted more time to writing.