[4] He moved with his family to Australia in his late teens and played for the New South Wales country club Orange Hawks in 2008.

[3] His good form in the 2008 season was acknowledged when he became a New South Wales Country Rugby League Group 10 under 23's representative player.

[8] In 2009 he played in the New South Wales Cup with Melbourne's feeder club, the Central Coast Storm, making his debut against the Bankstown Bulls in round 10.

[10] Bromwich made his first-team debut against the Harlequins RL at the Twickenham Stoop in the World City Challenge in 2010.

[12] The Melbourne club won the trophy with an 18–10 win over the Super League champions at Elland Road, Leeds.

On 8 May 2017, Bromwich was removed from the Kiwis World Cup squad for drunk and disorderly behaviour after the Anzac test.

[20] Bromwich played a total of 24 games for Melbourne in the 2021 NRL season as the club won 19 matches in a row and claimed the Minor Premiership.

[22] Bromwich was restored as Kiwis captain for the 2022 mid-season test match against Tonga at Mt Smart Stadium.

On 3 June 2024, it was announced that Bromwich would be ruled out for an indefinite period with a pectoral injury which he suffered during the clubs golden point extra-time loss against Canberra in round 13 of the 2024 NRL season.