Competing as an 18 year old, Deans claimed three individual medals and three relay medals at the 2018 Oceania Games in Port Moresby, Papua New Guinea.[5]
Later in 2018, she finished 15th in the 800 metre freestyle event at the 2018 FINA World Swimming Championships (25 m), in Hangzhou, China.[6]
At the 2022 World Aquatics Championships, Deans finished 13th in the 1500 metre freestyle[7] and 7th in the final as part of the 4x200 metre freestyle relay.[8]
At the 2022 FINA World Swimming Championships (25 m), she finished 5th in the 1500 metre freestyle,[9] 19th in the 200 metre freestyle[10] and 8th in the 4x200 metre freestyle relay.[11]
In 2023 Deans finished 16th in the 1500 metre freestyle[12] and 11th in the 4x200 metre freestyle relay at the 2023 World Aquatics Championships.[13] Deans also won a bronze medal at the Athens stop of the World Aquatics Swimming World Cup behind Lani Pallister and Katie Grimes. [14]
In 2024, at the 2024 World Aquatics Championships in Doha, Deans finished 10th in the 1500 metre freestyle[15] and fifth in the 4x200 metre freestyle relay.[16]
Later the same year, at the 2024 Summer Olympics, Deans was a member of the New Zealand 4x200 Freestyle Relay team, alongside Erika Fairweather, Eve Thomas and Laticia-Leigh Transom. After clocking 7:54.37 in the heats, the team finished eighth in the final.[17]
