O'Meley played with the Northern Lakes Warriors (previously Munmorah Maulers) on the New South Wales' Central Coast.

[4][5] O'Meley played for the Northern Eagles in their inaugural game against the Newcastle Knights in round 1 of the 2000 NRL season at the Central Coast Stadium.

O'Meley, nicknamed the Ogre or "Shrek"[6] for his shaved head and burly figure, was first selected to represent New South Wales as a front-rower for game II of the 2001 State of Origin series.

O'Meley played for Canterbury at prop forward in their 2004 NRL grand final victory over cross-town rivals, the Sydney Roosters.

[7] He announced that he would be leaving the Sydney Roosters at the end of the 2009 NRL season to play in the Super League with English club Hull F.C.

[8][9][10] O'Meley was selected for the Exiles squad for the Rugby League International Origin Match against England at Headingley on 10 June 2011.