[4] On 21 June 2019, she started at centre for New South Wales under-18 in the inaugural women's under-18 State of Origin game against Queensland.
[5] On 20 September 2019, she joined the St. George Illawarra Dragons NRL Women's Premiership squad as a development player.
[8] In Round 1 of the 2020 NRL Women's season, she made her debut for the Dragons, starting on the wing in a 4–18 loss to the Sydney Roosters.
[12][13] On 22 July, Jamie debuted at centre for the Gold Coast Titans, she ran for 123 metres in 9 runs, making 1 line break and 6 tackle breaks Chapman played in six of seven matches for the St. George Illawarra Dragons in the postponed 2021 NRL Women's season, including the Grand Final on 10 April 2022.
[17] In early June, the Brisbane Broncos announced that Chapman had signed to play for the club in the 2022 NRL Women's season.