[3] He has represented Seán Quinn in the High Court in disputes against Anglo Irish Bank.
[12] He was responsible for introducing a three strikes policy for Irish internet service provider UPC Ireland for piracy of copyrighted works by its customers.
[13] Cregan was appointed as chairperson of the IBRC commission of investigation in July 2015, replacing Daniel O'Keeffe.
[14] The commission's purpose is to investigate the sale of the company Siteserv by the Irish Bank Resolution Corporation to Denis O'Brien.
His role on the commission was full time, meaning that he was not available to hear cases in the High Court during this period.