The 45-year-old Oamaru physiotherapist has just returned from touring with the New Zealand Maori team competing in the Pacific Nations Cup.
The team won the event after beating Australia A 21-18 in the final.
It was a chance encounter at a rugby match in 1995 that led to Mr Stewart becoming the New Zealand Maoris' physiotherapist.
He was North Otago's physiotherapist between 1989 and 2005.
In 1995, he was physiotherapist for the North and South Island teams in the Prince of Wales Cup match in Oamaru.
There he met the newly-appointed New Zealand Maoris' coach, Matt Te Pou.
"The teams were pretty happy with the service I provided and he asked if I would be interested in [being] the New Zealand Maori team physio," he said.
Since then, he has travelled with the team on all its tours.
He has travelled with 15 New Zealand Maoris teams over 49 games.
During that time, the team has played Tonga, Fiji, Argentina, Scotland, England, the British-Irish Lions, the United States, Canada and Australia.
The side went unbeaten from 1995 to 2001.
Then it encountered the Wallabies in Sydney.
One of the matches, against Fiji in Lautoka, had to be delayed 15 minutes because there was danger in the lightning of an overhead tropical storm, and so much water on the ground there was the risk of drowning.
This year, under coach Donny Stevenson, the New Zealand Maoris represented New Zealand in the Pacific Nations Cup - last year it was New Zealand A.
The tour lasted five weeks.
Mr Stewart returned to his Oamaru practice earlier this month.
Mr Stewart acknowledged that, during the past 13 years, he had tended to a lot of All Blacks or future All Blacks in his role as team physiotherapist.
When he first started, he was doctor as well as physiotherapist.
Now the team has its own doctor and a trainer to work on fitness after injuries.
The best part of the job has been working with people, and the challenge of sorting out problems and injuries every day.
The worst has been being continually on the move, unpacking then packing up again almost on a daily basis.
