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