Penrith Panthers After playing for Penrith's second-tier team, the
St Mary's Cougars, in the
NSWRL Premier League, Aiton was called upon to make his NRL début on 23 April 2006, starting at
hooker for Penrith in their round 8 match against the
Cronulla-Sutherland Sharks, as a result of an injury sustained by
Craig Gower. He played a total of 72 games, scoring 8 tries, for the Panthers between 2006 and 2009.
Cronulla-Sutherland Sharks Aiton signed a 2-year deal with Cronulla in 2010 and went on to make 36 appearances, scoring 5 tries. At the end of the 2011 season it was announced he was to leave Cronulla to go play in the
Super League. Following his departure, he was one of seventeen Sharks players found guilty of using illegal substances under the club's
2011 supplements program. When the case was eventually concluded in 2016, Aiton had a twelve-month suspension recorded against his name, although he served none of the time due to backdating of the sanction.
Wakefield Trinity Wildcats Aiton transferred to
Wakefield Trinity Wildcats in England on a two-year contract from 2012. He made 47 appearances for them in 2 years scoring 7 tries.
Leeds Rhinos In November 2013, Aiton signed a three-year contract with the
Leeds Rhinos starting in 2014. He played in the
2014 Challenge Cup Final victory over the
Castleford Tigers at
Wembley Stadium, Leeds' first in over a decade. He missed part of the 2014 season due to medication he was taking that prevented him from playing. Aiton was injured towards the end of the 2015 season and missed out on winning the Treble with Leeds. He left making 47 appearances scoring 3 times.
Catalans Dragons On 5 August 2015, Aiton decided not to sign a new deal with the Leeds Rhinos, instead moving on to play for France's biggest rugby league franchise the
Catalans Dragons. Aiton said “I will always be honoured to have played for Leeds Rhinos but the opportunity to move to France from next season and be part of the Dragons was something that excited me at this stage in my career." He signed a three-year deal with the Dragons beginning in the 2016 season.{{cite news ==Representative career==