 He claimed his first silverware as manager following the 1-22 to 4-12 defeat of Patrickswell.On 22 November 2015, Na Piarsaigh won the Munster Championship after a 2-18 to 2-11 defeat of Ballygunner in the final.On 17 March 2016, O'Neill managed Na Piarsaigh to the All-Ireland Championship medal when the club defeated Ruairí Óg by 2-25 to 2-14 in the All-Ireland final.