In July 2013, Okoro moved to Bulgarian A Professional Football Group side Cherno More Varna in a season-long loan deal.

[6] On 7 May 2017, Okoro joined fellow Nigerian Professional Football League side Plateau United FC,[7] but was released on 28 September.

[8] Okoro appeared with the under-17 team at the 2009 FIFA U-17 World Cup,[9] playing his first match in the tournament in a 3–3 draw against Germany and scoring his side's first goal through a penalty kick in the 54th minute.

[11] On 29 August 2010, Okoro was called up to the main squad, replacing injured Joseph Akpala for a 2012 Africa Cup of Nations qualification match against Madagascar.

[12] He made his debut on 5 September, coming on as a second-half substitute for Michael Eneramo in a 2–0 win at the U. J. Esuene Stadium.