She won silver in the 50-metre freestyle at the 2000 Summer Paralympics and bronze in the Women's PTVI Paratriathlon at the 2022 Commonwealth Games.

[3] In July 2017, Tuomela began training with former national team athlete Ellen Pennock.

[7] Guided by Pennock, Tuomela won a gold medal in the women’s visually impaired race at the Duathlon World Championships in Penticton in 2017.

[7] In 2018, Tuomela won the World Para Triathlon Series in Edmonton with guide Lauren Babineau, becoming the first fully blind athlete to win gold in an event on the World Para Triathlon Series circuit.

[8] In 2019, she won bronze at the ITU Paratriathlon World Championship in Lausanne, Switzerland with guide Marianne Hogan.

[9] Tuomela and Hogan won bronze in the 2019 World Para-triathlon Series in the women’s visually impaired category.

[11][12] In June 2022, Tuomela and guide Emma Skaug were named to Canada's 2022 Commonwealth Games team.

[11][14] Tuomela and Skaug won bronze at the 2023 World Triathlon Championship Series in Yokohama, Japan.