Feargal “Sake” O'Rourke (born 3 August 1964) is an Irish accountant and corporate tax expert, who is the managing partner of PwC in Ireland. He is considered the architect of the Double Irish tax scheme used by U.S. firms such as Apple, Google and Facebook in Ireland, and a leader in the development of corporate tax planning tools, and tax legislation, for U.S. multinationals in Ireland.