She represented Canada at the 2016, 2020 and 2024 Summer Paralympics, winning back-to-back gold medals in the women's S7 50-metre butterfly in 2020 and 2024.

[6] When she was 11, she was discovered by Swimming Canada’s para-swimming performance pathway coach, Janet Dunn.

At the Pan Pacific Para Swimming Championships, she set Canadian records in the backstroke and butterfly with times of 1:23.59 and 1:18.20 respectively.

[19] At the 2023 World Para Swimming Championships in Manchester, England, she won gold in the women's S7 100-metre backstroke and S7 50-metre butterfly and bronze in the SM7 200 individual medley.

[20][21] Dorris successfully defended her title in women's S7 50-metre butterfly at the 2024 Summer Paralympics, winning gold in 32.66 seconds.

She and para cyclist, Alexandre Hayward, were named New Brunswick’s Athletes of the Year, marking Dorris' third time winning the award in addition to being a finalist in 2019 and 2022.