[citation needed] In 2009, in the Austrian city of Villach, he won the Kickboxing World Championships gold medal in K-1 Rules to 91 kg, defeating Vladimir Mineev.

[2][3] On 16 October 2010, he made his professional debut as a boxer in Legionowo, beating Igoris Papunia from Lithuania by first-round knockout.

[4] He fought his second professional fight on 20 November 2010, in a show in Nysa, during which he defeated Pavel Habra by technical KO in the first round.

In 2014, Ugonoh started training under Kevin Barry while being signed to Duco Events,[5] and became a regular sparring partner for Joseph Parker.

He went on to gain wins over Julius Long[8] and Will Quarrie[9] before facing Ibrahim Labaran for the interim WBA Oceania and WBO Africa heavyweight titles.

[12] Ugonoh next fought on the 1 October, knocking out Gregory Tony in two rounds to pick up the vacant IBF Mediterranean heavyweight title.

[15] On the 25 February 2017, Ugonoh faced former world title challenger Dominic Breazeale on the under card of Deontay Wilder vs Gerald Washington, in Birmingham, Alabama, USA.

[19] On July 11, 2020, news surfaced that Ugonoh transitioned from boxing to mixed martial arts and had signed a contract with Konfrontacja Sztuk Walki.

[25] [26] Ugonoh also played a wrestling cameo in the Polish movie Afonia and the bees (2009) directed by Jan Jakub Kolski.