 He joined the London GAA and, through this, the IRB.Sam Maguire, a republican from Dunmanway, County Cork, introduced the 19-year-old Collins to the IRB.In 1915 he moved to work in the Guaranty Trust Company of New York where he remained until his return to Ireland the following year joining part-time "Craig Gardiner & Co", a firm of accountants in Dawson Street, Dublin.