Born in Blackburn, Lancashire, O'Neill started his career in the youth system at Preston North End turning professional in the summer of 2001.
[4] He made his professional debut in August 2013, coming on as a substitute for Lee Connell in the Football League Cup defeat to Tranmere Rovers.
In August 2004, O'Neill joined Football League Two side Mansfield Town on a three-month loan, after impressing on trial.
In January 2005, O'Neill joined League Two side Chester City on loan for an initial month with the view to a permanent deal.
[7][8] In the summer of 2007, O'Neill turned down an offer to join Football League Two side Rotherham United and agreed a new deal with Altrincham.
[14] In February 2014, O'Neill was on the move again, dropping down to North West Counties League First Division side Nelson, joining his brothers Ed and Matty.
[15] In his first season with the club he scored an impressive eight goals in ten appearances, as the Admirals gained promotion to the NWCFL Premier Division.
[20] In March 2014, the brothers made history in the 8–1 win for Nelson over Widnes Vikings, being the first three siblings to score in the same game in the North West Counties League.