He is ranked #9 light heavyweight kickboxer of the world by Liverkick.com.
Mwekassa began training in South Africa in 2003 with elite kickboxers, including the late Mike Bernardo. His trainers intended him for the K-1 circuit but the opportunities were scarce, so he moved into professional boxing in 2006.
In 2014, Mwekassa resurrected his interest in kickboxing. He saw GLORY on television and approached the company about fighting for them. He soon found himself scheduled to face popular MMA and kickboxing fighter Pat Barry at Glory 16: Denver. In what many considered a shocking upset, he knocked out Barry with a vicious uppercut in the first round.
Mwekassa returned to the Glory ring on November 7, 2014 at Glory 18: Oklahoma. He was part of a four-man, one-night tournament to decide the next Light Heavyweight title contender.
Mwekassa had a rematch with Cavalari for the vacant Glory Light Heavyweight Championship at at Bellator MMA & Glory: Dynamite 1 on September 19, 2015. He lost the fight via unanimous decision.