During his career, Johnson has coached at 10 Olympic Games and 14 world championships. He recently attended his 11th Commonwealth Games. His athletes have gone on to win nearly 200 international medals, with over fifty of his athletes competing at the Olympics. He has guided the UBC Thunderbirds to eight men’s and 11 women’s Canadian university championships.
One of his standout achievement includes Canada’s Brent Hayden, who was 2007 world champion and won bronze in the 100-metre freestyle at the 2012 Games. Other swimmers Johnson has coached include Brian Johns (a former short-course world record holder); Marianne Limpert (an Olympic and world championship medallist); Mark Versfeld, (a two-time world championship medallist) Jessica Deglau (a two-time Olympian and Pac Pacific Championship medallist) and Kelly Stefanyshyn (a Commonwealth Games and Pan American Games medallist).
His current crop at the Swimming Canada High Performance Centre – Vancouver includes international medalists Emily Overholt, Yuri Kisil, Markus Thormeyer and Erika Seltenreich-Hodgson.
This past summer as an appointed Coach to the 2019 FINA World Championships, Tom coached Emily Overholt who was a member of the 4×200 freestyle relay team that brought home bronze.