Walter Christian Ploeser (1907–1993)

Non-career appointee
State of Residence: Missouri
  1. Ambassador Extraordinary and Plenipotentiary (Paraguay)
    Appointed: August 5, 1957
    Presentation of Credentials: November 6, 1957
    Termination of Mission: Left post on September 12, 1959
  2. Ambassador Extraordinary and Plenipotentiary (Costa Rica)
    Appointed: April 8, 1970
    Presentation of Credentials: April 27, 1970
    Termination of Mission: Left post on April 13, 1972