[1] At the 2019 World Para Swimming Championships in London, she finished fifth Women's 100 m Backstroke S14 final.

In February 2020, she won the 200 m freestyle final at the World Para Swimming Series in Melbourne, her first individual international gold medal.

In November 2020, at the Australian Virtual Short Course Championships, she set a world record in the Women's 400 m Freestyle Multi-class.

[3] At the 2020 Summer Paralympics, McTernan teamed up with Ruby Storm, Ricky Betar and Benjamin Hance in the Mixed 4 x 100 m freestyle S14.

[4] They won the silver medal with a time of 3:46.38, just under 6 seconds behind the winners, Great Britain, who set a world record.