Having dominated on the track, Courtney turned his attention to other sports in the late 80s following a move to the United States in 1985. He began competing in distance events, including all the big marathons, and competed to a high level in wheelchair basketball and tennis.
It was at this time Courtney became the first disabled person in New Zealand to be honoured with being a Sports & Cultural Ambassador to NZ.
Since returning to New Zealand in 2002, Courtney continued to be heavily involved with disabled sport and recreation. He served on the board of ParaFed Auckland for more than a decade, and was an active volunteer with the Auckland Spinal Unit.
In 2010 Courtney was appointed to the Paralympics New Zealand's Order of Merit.