On St Patricks Day 2017 he was part of the Corkes team who won the All-Ireland Senior Club Football Championship in Croke Park.
He first played with the Kerry GAA minor team in 2004 winning a Munster Championship as a sub, he was also part of the panel that lost the All Ireland final to Tyrone.
Following on from his Under 21 success in 2008 he again played with the Junior team winning a Munster title, Kerry later lost out to Roscommon in the All Ireland semi final.
After no success in 2009 Kerry were back as Munster Champions in 2010 with O Sullivan again playing a key role, they later lost out to Sigo in the All Ireland final.
After playing no part in 2011 he won a third Munster Championship and later a first All Ireland at Junior level after beating Mayo in the final.