Greene's precise kicking from hand and from tee helped Brisbane Grammar win seven from eight matches in the GPS Rugby season, including come-from-behind victories against BBC, Southport and Nudgee.

[4] In 2014 Greene moved to Brothers Old Boys, coached by Brisbane Grammar teachers Anthony Mathison and Carl Marshall to fill the void left by capped-Queensland Reds flyhalf Dallan Murphy.

His form for the Reds Under-20s and Brothers throughout the year inspired Brisbane City (rugby team) coach Nick Stiles to select him for a match at Suncorp Stadium.

[citation needed] In 2015 Greene broke Queensland Reds flyhalf Elton Flatley's single-game point-scoring record for Brothers, scoring 33 points against GPS.

[citation needed] Greene made his Queensland Reds debut off the bench against the Melbourne Rebels at Suncorp Stadium in 2015, and signed an Elite Development Squad contract shortly afterwards.