Thomas Alfred Shannon Jr. (1958–)

Career Foreign Service Officer
State of Residence: Virginia
  1. Assistant Secretary of State for Western Hemisphere Affairs
    Appointed: October 12, 2005
    Entry on Duty: October 17, 2005
    Termination of Appointment: November 10, 2009
  2. Ambassador Extraordinary and Plenipotentiary (Brazil)
    Appointed: December 29, 2009
    Presentation of Credentials: February 4, 2010
    Termination of Mission: Left post on September 6, 2013
  3. Career Ambassador
    Appointed: September 26, 2012
  4. Counselor
    Appointed: December 24, 2013
    Entry on Duty: December 24, 2013
    Termination of Appointment: February 12, 2016
  5. Under Secretary of State for Political Affairs
    Appointed: February 12, 2016
    Entry on Duty: February 12, 2016
    Termination of Appointment: June 4, 2018
  6. Secretary of State ad interim
    Appointed: January 20, 2017
    Termination of Appointment: February 1, 2017
    • Under Secretary of State for Political Affairs; Acting Secretary of State