He won three national athletics championship titles and represented his country at the 1974 British Commonwealth Games in the 400 metres hurdles.
[1] Representing Canterbury, he won the national men's under-19 400 metres hurdles championship in 1971, with a winning time of 56.1 seconds.
[4] In his semi-final, McIntosh finished in sixth place, but his time of 51.95 seconds was a New Zealand national record for the event.
[6] After moving to the Auckland suburb of Parnell, McIntosh began researching the history of Judges Bay in 2002.
[9][10] In 2005, McIntosh was appointed manager of Alberton, an historic house in Mount Albert originally belonging to Allan Kerr Taylor and now owned by Heritage New Zealand.