Cullen played on the Canadian Tour in 2010 and has played on the Professional Golf Association Tour of Australasia since 2011. He also qualified for the 2012 Open Championship through International Final Qualifying. He beat countryman Peter O"Malley by five strokes.
He prevailed by a single stroke over three players, including Adam Scott.
Professional Golf Association Tour of Australasia wins (2)
OneAsia Tour wins (1).
He won his first professional tournament at the Enjoy Jakarta Indonesia Open on the OneAsia Tour in March 2012. In August 2013, Cullen won his first event on the Professional Golf Association Tour of Australasia at the Isuzu Queensland Open. The following year, he won one of the Professional Golf Association Tour of Australia"s big three tournaments, in the BetEasy Masters.
He was a long term member of the Golf Australia Rookie Squadron
