He was one of the few shining lights for the New Zealand Knights in their debut A-League season, scoring four competition goals from nine starts.

On 17 March 2006, the New Zealand Knights announced that Brockie had decided to leave the club and join Sydney FC on a two-year contract.

[2][3] Brockie failed to find a regular place in Terry Butcher's first team, included in the starting line-up just twice and figuring in only seven matches of the A-League season.

Despite being named in the Sydney FC squad for the AFC Champions League,[4] Brockie was released early from his contract on 6 March 2007 for personal reasons.

Brockie was loaned to Major League Soccer club Toronto FC, where he joined manager Ryan Nelsen, a fellow New Zealander, on 7 May 2013.

On 19 February 2006, Brockie made his international debut, coming on as a substitute and playing the last twenty minutes of New Zealand's 1–0 win over Malaysia at Christchurch's QE II Stadium.

On 7 August 2008, Brockie scored for the NZ U23's in the 1–1 draw against hosts China at the Olympic Football Preliminaries from a flicked ball over the defence by teammate Craig Henderson.