The Representative of the United States to the European Office of the United Nations is the chief of mission of the United States Mission to the European Office of the United Nations and Other International Organizations at the United Nations Office at Geneva (abbreviated UNEO in the U.S. State Department). The full official title of the position is The Representative of the United States of America to the European Office of the United Nations, with the rank of Ambassador. The office was established in 1958 by 22 U.S.C. § 287 : US Code - Section 287(e): Representation in Organization. The Representative has the rank of Ambassador and reports directly to the United States Ambassador to the United Nations. The office is sometimes referred to as ambassador but the correct title is representative for organizations. Mark Cassayre, who became deputy chief of mission in August 2018, has been chargé d'affaires ad interim since January 20, 2021. Andrew Bremberg was confirmed by the United States Senate on October 22, 2019 and served until the conclusion of the Trump presidency. Representatives References from unless otherwise indicated. Henry Serrano Villard – Career FSO Appointed: June 15, 1958 Terminated mission: August 3, 1960 Graham Martin – Career FSO Appointed: September 18, 1960 Terminated mission: April 15, 1962 Roger Tubby – Political appointee Appointed: October 18, 1967 Terminated mission: September 24, 1969 Idar D. Rimestad – Career FSO Appointed: September 26, 1969 Terminated mission: June 16, 1973 Francis L. Dale – Political appointee Appointed: December 19, 1973 Terminated mission: July 1, 1976 Henry E. Catto, Jr. – Political appointee Appointed: July 1, 1976 Terminated mission: April 4, 1977 William vanden Heuvel – Political appointee Appointed: July 1, 1977 Terminated mission: December 5, 1979 Gerald B. Helman – Career FSO Appointed: December 6, 1979 Terminated mission: October 13, 1981 Geoffrey Swaebe – Political appointee Appointed: November 8, 1981 Terminated mission: November 17, 1983 Gerald P. Carmen – Political appointee Appointed: April 12, 1984 Terminated mission: August 31, 1986 Joseph Carlton Petrone – Political appointee Appointed: March 12, 1987 Terminated mission: July 27, 1989 Morris B. Abram – Political appointee Appointed: May 12, 1989 Terminated mission: March 19, 1993 Daniel L. Spiegel – Political appointee Appointed: November 4, 1993 Terminated mission: 1996 or 1997 George Moose – Career FSO Appointed: November 18, 1997 Terminated mission: May 31, 2001 Kevin Moley – Political appointee Appointed: October 1, 2001 Terminated