She won gold competing for Great Britain at the 2016 Rio Olympics, where she scored GB's first goal of the tournament as well as the first goal in the Gold Medal final.[4] She competed for England in the women's hockey tournament at the 2014 Commonwealth Games where she won a silver medal.[5] She was selected for the 2018 Commonwealth Team but had to withdraw due to injury.
Owsley won Euro hockey gold with England in August 2015 at the Queen Elizabeth Olympic Park in Stratford, London. She scored the final goal to end full-time 2–2 with the Netherlands, then England won the penalty shoot out.[6]
In January 2016, Owsley was named global FIH Rising Star of 2015.[7]
In June 2021, it was announced that Owsley would be partaking in her second Olympic Games at Tokyo 2020, representing Great Britain in the Women's field hockey team.