[1] At the junior level, Brown finished sixth in the all-around at the 2009 Australian Championships, and she won the balance beam title.

[8] Brown was part of the Australian team at the 2011 World Championships in Tokyo alongside Ashleigh Brennan, Larrissa Miller, Emily Little, Lauren Mitchell, and Mary-Anne Monckton.

[12] At the Australian Championships, she finished fourth in the all-around, and she won the bronze medal on the uneven bars behind Olivia Vivian and Mary-Anne Monckton.

[15] Brown began the 2014 season at the Nadia Comaneci Invitational where she finished third in the all-around behind teammate Georgia Godwin and Venezuela's Jessica López.

[18] Her next competition was the Pacific Rim Championships where she won a bronze medal on the uneven bars behind Americans Elizabeth Price and Kyla Ross.

[19] Brown was selected to represent Australia at the 2014 Commonwealth Games alongside Larrissa Miller, Lauren Mitchell, Mary-Anne Monckton, and Olivia Vivian.

[26] Brown began the 2016 season at the Pacific Rim Championships where she helped Australia win the bronze medal behind the United States and Canada.

[32] Her final meet of the year was the Toyota International where she finished sixth on the uneven bars and balance beam and fifth on the floor exercise.

In the event finals, she won the balance beam and floor exercise titles, and she placed fourth on the uneven bars.

[39] She was selected to represent Australia at the 2018 Commonwealth Games alongside Alexandra Eade, Georgia Godwin, Rianna Mizzen, Emily Whitehead.

[41] She also placed fourth in the uneven bars final,[42] and she won the silver medal on the balance beam behind England's Alice Kinsella.

[50] Brown was selected to compete at the World Championships in Stuttgart alongside Godwin, McDonald, Emma Nedov, and Talia Folino.

[51] After the World Championships, she competed at the Toyota International where she placed fifth on the uneven bars, balance beam, and floor exercise.

[55] Brown returned to competition at the 2021 Oceanic Championships to earn a continental quota berth for the postponed 2020 Olympic Games.

[57] She was selected to compete at the 2022 World Championships alongside Romi Brown, Georgia Godwin, Kate McDonald, and Breanna Scott, and they finished tenth in the qualification round.