WHISTLEBLOWER READY TO TESTIFY By NILES LATHEM WASHINGTON — A former U.N. official who was fired after warning his superiors of flagrant mishandling of the U.N. oil-for-food program will be the star witness at a congressional hearing this week. Dr. Rehan Mullick, a Pakistani national who worked as a U.N. research officer in Baghdad from 2000 to 2002, is expected to be the first U.N. insider to publicly detail mass corruption in the program when he testifies before the House International Relations Committee tomorrow. A spokesman for the committee said in a statement yesterday that Mullick repeatedly warned his superiors in Baghdad and later in New York that Saddam Hussein's regime was diverting humanitarian goods to his military and that Iraqi intelligence agents had penetrated the U.N. offices in Iraq. Despite his impassioned pleas, he was repeatedly demoted until his job was finally terminated by the United Nations in 2002, the committee statement said. U.N. spokesman Farhan Haq said a blistering 10-page report that Mullick delivered to top U.N. officials in Manhattan days before he was terminated has now been forwarded to the special investigative commission headed by former Federal Reserve Board Chairman Paul Volcker. We are confident that Volcker and the committee will evaluate whether appropriate action was taken with regard to that report, and we will follow up on whatever findings the Volcker panel makes, Haq said. Mullick's story was first reported in the National Journal. Mullick alleged that Saddam was hoarding humanitarian goods meant to feed his people and then reselling them on the black market. He also reported that wives and children of senior Ba'ath Party officials and intelligence agents got plum jobs at the United Nations and managed to get control of — and manipulate — the database that tracked delivery of humanitarian goods. The world body never investigated findings contained in the 10-page report that Mullick delivered to top U.N. officials in New York in December 2002. The only response he received was a written notice that his contract would not be renewed.