Ulster signed Justin Harrison on a three year contract beginning 2005-06, a passionate and committed player with a no holds barred approach to the game Harrison has a reputation as a brilliant line-out technician and at over 2 metres tall, is a purpose built lock.

Justin has a degree in Applied Science from the University of Canberra. A latecomer to the game, Justin did not start playing rugby until after he left school and in 1994 he made the ACT U21s and then the Australian Universities team. The following year he went on to play in the Australian U21s team and made his Super 12 debut with the Brumbies in 1997 before moving to the Waratahs in 2004.

A veteran of the 2003 Rugby World Cup, Justin has 34 international caps and made his debut in front of 84,000 people as Australia took on the British Lions in the third and final test of the 2001 series.

Justin has become a real fans' favourite, captaining the side on a number of occasions and in May 2005 won the prestigious Ulster Rugby Personality of the Year Award.