 He became Attorney-General for Ireland a year later, on which appointment he was sworn of the Privy Council of Ireland.FitzGerald held the former post until 1858 and after a break for a year, again until 1860, when he was appointed Judge on the Court of Queen's Bench (Ireland).On 23 June 1882, he was created a Lord of Appeal in Ordinary with the title Baron FitzGerald, of Kilmarnock, in the County of Dublin.