 In 1999 Quayle joined Cerberus Capital Management, a multibillion-dollar private-equity firm, where he serves as chairman of the company's Global Investments division.As chairman of the international advisory board of Cerberus Capital Management, he recruited former Canadian prime minister Brian Mulroney, who would have been installed as chairman if Cerberus had successfully acquired Air Canada.In early 2014, Quayle traveled to Belfast, Northern Ireland, in an attempt to speed approval for a deal in which Cerberus acquired nearly £1.3 billion in Northern Ireland loans from the Republic of Ireland's National Asset Management Agency.