Corbett turned professional in 1997 and rose to national prominence in 2002 when he defeated Australian legend Scott ‘The Cannon’ Bannon with a slicing right elbow. He then followed up this strong performance with a 1st-round KO win over Clifton Brown of Canada, winning his first WMC World Title.

On 26 June 2005 at Xplosion 10 event in Australia, Corbett won his second WMC World Title over Russian fighter Magomed Magomedov.

At 3rd MARS World Fighting GP in Chiba, Japan in 2006 he suffered his first KO loss of his career against American Heavyweight Alex Roberts.

Corbett’s career is undoubtedly tied to that of Tyrone Spong. The two fought for the first time in Jamaica in 2009 in a highly anticipated bout of heavyweight kick boxers at the peak of their respected careers. It would be a major test for Corbett as Spong was the not only the most decorated fighter he would challenge at that point but the bout would be under modified kickboxing rules, eliminating Corbett’s ability to use his infamous elbows.

He was scheduled to face Nikolaj Falin at Kings of Kombat 8 in Melbourne on 8 December 2012 but his opponent pulled out due to health issues.

He was then reported to be fighting Dzianis Hancharonak at Total Carnage III in Gold Coast on 9 March 2013 but Hancharonak was already penciled in to face another opponent close to that date and did not accept the fight, and so Javlon Nazarov stepped in. Finally, Nazarov was replaced by Kamil Sokolowski of Poland Sokolowski began the contest with heavy pressure but was countered viciously with knees and finally a right elbow to the temple of Sokolowski handing Corbett a KO victory 20 seconds into the first round.

He signed a two-fight contract with Glory in July 2013. In his long-awaited rematch with Tyrone Spong at Glory 11: Chicago – Heavyweight World Championship Tournament in Hoffman Estates, Illinois, United States on 12 October 2013, he was dropped twice with left hooks in round two and lost by TKO.

At Total Carnage IV held in Gold Coast on 14 December 2013, Nathan Corbett took a second round elbow TKO win over Henriques Zowa, defending the WKN Heavyweight Muay Thai World Title.

Competing for the inaugural Glory Light Heavyweight Championship, he fought in the Glory 15: Istanbul – Light Heavyweight World Championship Tournament in Istanbul, Turkey on 12 April 2014. In the semi-finals against Gökhan Saki, Corbett was struck with a left overhand to the ear, or what’s infamously referred to as the “Saki Bomb”. Corbett’s ear exploded, which led to part of the ear openly hanging off. The ringside physician intervened and referee Al Wichgers called a halt to the fight at the 2:35 of Round 1, handing Corbett a TKO loss and eliminating him from the tournament.