Dileep Nair (Malayalam: ദിലീപ് നായർ) is a Singaporean Indian diplomat and bureaucrat, who was the United Nations Under-Secretary-General for Internal Oversight Services and head of the United Nations Office of Internal Oversight Services. In that capacity, he oversaw investigations of wrongdoings related to the United Nations in a range of countries including within the headquarters. The Oil-for-food scandal was initially investigated by Dileep Nair's office before turning it over to the investigating body headed by former United States Federal Reserve Chairman, Paul Volcker.