Ambassador Mark D. Wallace serves as the President of United Against Nuclear Iran. He is also the CEO of Tigris Financial Group Ltd. Most recently, he served as United States Ambassador to the United Nations, Representative for U.N. Management and Reform. Ambassador Wallace was the chief U.S. negotiator to the world body on matters relating to reform and budget. He was the chief of U.S. oversight into matters relating to U.N. mismanagement, fraud and abuse.