Career
Robertson, who is also known as "Robbo", entered in his first triathlon at age 16 with his mates and became hooked on the sport. Robertson competed at the first Olympic triathlon at the 2000 Summer Olympics. He took thirty-fourth place with a total time of 1:51:39.04.
He competed again four years later, at the 2004 Summer Olympics.
This time, he placed twenty-fourth with a time of 1:55:44.36. The International Telecommunication Union World Championships is the second most competitive Olympic Distance Triathlon in the world, the first being the Olympics.
In the 2006 Robertson took the bronze medal. Later in 2006 Robertson took sixth place in the International Telecommunication Union World Triathlon Championships, beating American Hunter Kemper by one second.