One of the country's two Ombudsmen has resigned and will leave the role two years before the end of his five-year term.
Professor Ron Paterson will leave the role on Thursday. He was appointed an Ombudsman in June 2013 for a five-year period.
Deputy Ombudsman Leo Donnelly will be appointed temporary Ombudsman for a 12-month period, which could be extended by another two years.
The change comes as the office attempts to clear a backlog of 650 investigations that have been pending for more than a year.
In December, Principal Family Court Judge Peter Boshier was appointed Chief Ombudsman.