The 2018 African Championships were a success for Okezie. He won an individual bronze medal in the 400 metres behind Baboloki Thebe and Thapelo Phora. This made him a two-time African Championships bronze medallist as he had won a bronze medal at the 2016 Championships in Durban. He later anchored the Nigerian 4 x 400 m relay team to a bronze medal behind Kenya and South Africa. Okezie was also a member of the African quartet that placed second in the mixed 4 x 400 m relay at the 2018 IAAF Continental Cup.