Fien played in all four of the Kiwi's 2010 Four Nations internationals at halfback, including scoring the match winning try in the 79th minute of the final.

Fien's impressive late season form saw him winning the halfback spot in Rugby League World's 2010 team of the year.

Fien was educated at Blackheath and Thornburgh College, Charters Towers and played his junior rugby league for Brothers in Mount Isa.

In the 2004 NRL season, Fien played twenty-three games for North Queensland as the club reached the finals for the first time.

This request was initially turned down by the Warriors due to the earlier release of Grant Rovelli,[7] however on 30 June 2009 it was announced that Fien would transfer to the St. George Illawarra Dragons for the remainder of the season.

Upon his return, he provided attacking options to the team and proved an invaluable player throughout the end of the regular season and finals.

Following this discovery the International Rugby League Board declared him ineligible to play for the Kiwis, and New Zealand was stripped of its 2 championship points they got from beating Great Britain.