A. D. P. Heeney

Arnold Heeney taught at St. John’s College School, studied at Manitoba and Oxford, and practised law in Montréal before entering the centre of Canadian government. He became Mackenzie King’s principal secretary in 1938, then clerk of the Privy Council and secretary to the cabinet in 1940. During the Second World War, he coordinated the Cabinet War Committee. 1

Heeney became under-secretary for external affairs in 1949 and later represented Canada at NATO and in the United States. His public service also included leadership of the Civil Service Commission and the Canadian section of the International Joint Commission. He wrote the memoir The Things That Are Caesar’s. 1

Washington Appointments

  • Canada — Ambassador, 1959–1962
  • Canada — Ambassador, 1953–1957

Sources

  1. Memorable Manitobans: Arnold D. Heeney (1902–1970)

    Biography and bibliography

  2. A. D. P. Heeney — mission record (1959–1962)
  3. Canadian ambassadors to the United States: roster

    Tenure chronology; pre-1989 appointments belong to earlier chancery buildings.

  4. A. D. P. Heeney — mission record (1959–1962)
  5. A. D. P. Heeney — mission record (1953–1957)
  6. A. D. P. Heeney — mission record (1953–1957)

Biography checked 2026-10-28.

Cite or Reuse This Biography

A. D. P. Heeney. Chanceries Diplopedia. Biography reviewed 2026-10-28. Record c12a60098f17ddea. https://chanceries.org/diplopedia/people/a-d-p-heeney-133ab2ec5c/

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Biography: A. D. P. Heeney