Luke was born and raised in the rural New South Wales coastal township of Taree. He currently lives on Queensland's Gold Coast, where he trains during the Australian summer. He spends most of his racing season in the USA, based out of Cardiff-by-the-Sea, California and also enjoys training in the mountains of Bend, Oregon in the warmer summer months. Luke specializes at the Ironman and Half Ironman (70.3) distances as well as the short course non-drafting formats. He is known for his powerful, off-the-front, cycling.
His interest in triathlon was fired in the early 90's when he helped man an aid station at Ironman Australia. In 1995, he entered his first triathlon and won. From this point he was hooked. As a 16-year-old Luke was selected for the Australian duathlon team competing in the World Championships at St Wendell, Germany. As the Under 20's youngest competitor he finished 7th. In 2001 Luke competed in the inaugural Sydney Youth Olympics and won by a considerable margin. This result helped to secure him a place in the Australian Institute of Sport Triathlon squad and provided Luke with valuable support, training and learning experiences.
In 2006 Luke realized his dream of competing in the Ironman World Championships in Kailua Kona, Hawaii. Although Luke suffered a stress fracture in his knee after a bike crash in training just a few weeks before the event, he decided to compete anyway. Limping to the finish he achieved a major life goal. His first Ironman victory came in 2008 while setting a new course record time of 8:29:11 at Ironman Japan. He has since added victories in Malaysia (2009), Japan (2009), China (2010), Brazil (2010) and Cairns (2013). In 2013, he had his best performance at the Ironman World Championships, finishing second.