Warren W. Tichenor (born in Harlingen, Texas in 1960) served as the 16th United States Ambassador to the United Nations International Organizations in Geneva. He served under president George W. Bush, and was sworn in on June 12, 2006 after being confirmed by a unanimous vote of the United States Senate on May 26, 2006. During his tenure at the State Department, ambassador Tichenor led the United States Mission to the UN in Geneva in promoting and advancing United States policy before the United Nations, member states of the United Nations and the international organizations in Geneva.