[citation needed] He played his junior rugby league at Centenary Panthers and Runaway Bay Seagulls.

[3] Brimson made a total of 21 appearances and scored 4 tries for the Gold Coast in the 2019 NRL season as the club endured a horror year on and off the field.

During the halfway mark of the season, head coach Garth Brennan was sacked by the club after a string of poor results.

[4][5] On 7 October, Brimson earned his first representative jersey as he was named for the Australian side in the 2019 Rugby League World Cup 9s.

[6] He played nine games scoring seven tries in 2020, leading the Gold Coast to five straight wins to end the season, where his form granted him a spot in the Queensland Origin team.

On 4 November 2020, Brimson made his State of Origin debut at the Adelaide Oval, scoring a try in Queensland's 18–14 win in game 1 of the series.

[7] On 17 August, Brimson was ruled out for an indefinite period after suffering a hairline fracture to his jaw in the Gold Coast's round 22 loss against South Sydney.