 He was assistant manager to Tommy Dunne in the Cork City set-up in 2010.He has six Munster Senior Cup medals to his name, as well as two League of Ireland Premier Division titles.The well travelled O'Halloran joined Galway United in July 2007, signing from Derry City whom he had joined only a few months earlier in February 2007; this was after a year-long spell with Shelbourne where he won a League winners medal.