{"record":{"aliases":[],"appointmentIds":["canada-c728e6f84d400a","canada-128a7a4853f1d8"],"appointmentsDataset":"https://chanceries.org/diplomats.json","archivalSources":[],"canonicalUrl":"https://chanceries.org/diplopedia/people/a-d-p-heeney-133ab2ec5c/","countrySlug":"canada","entityId":"https://chanceries.org/diplopedia/people/a-d-p-heeney-133ab2ec5c/#person","eventIds":[],"expandedParagraphs":["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.","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."],"id":"canada:a. d. p. heeney","identifiers":{},"legacyPersonIds":[],"legacyUrl":"https://chanceries.org/diplomat-133ab2ec5cf28205bebf.html","name":"A. D. P. Heeney","notes":[],"paragraphSources":[["mhs-bio"],["mhs-bio"]],"profileUrl":"diplomat-133ab2ec5cf28205bebf.html","relatedEvents":[],"relatedPeople":[],"relationships":[],"researchStatus":"reviewed","reviewedOn":"2026-10-28","revision":"c12a60098f17ddea","sources":[{"accessedOn":"2026-10-28","date":"2013-07-26","id":"mhs-bio","locator":"Biography and bibliography","publisher":"Manitoba Historical Society; Gordon Goldsborough","title":"Memorable Manitobans: Arnold D. Heeney (1902–1970)","type":"reference","url":"https://mhs.mb.ca/docs/people/heeney_a.shtml"},{"accessedOn":"","date":"","id":"mission-6e33ed2fe2c702536e1b","locator":"","publisher":"","title":"A. D. P. Heeney — mission record (1959–1962)","type":"Mission record","url":"https://w05.international.gc.ca/CHOMA-CDMCE/Posting/View/2375"},{"accessedOn":"","date":"Accessed 21 October 2026","id":"mission-3c9e89462afdcdc1960d","locator":"Tenure chronology; pre-1989 appointments belong to earlier chancery buildings.","publisher":"","title":"Canadian ambassadors to the United States: roster","type":"Mission record","url":"https://en.wikipedia.org/wiki/List_of_ambassadors_of_Canada_to_the_United_States"},{"accessedOn":"","date":"","id":"mission-a9f7dce801fac3a0d88a","locator":"","publisher":"","title":"A. D. P. Heeney — mission record (1959–1962)","type":"Mission record","url":"https://history.state.gov/departmenthistory/visits/canada"},{"accessedOn":"","date":"","id":"mission-54c8ef2e536738fc245d","locator":"","publisher":"","title":"A. D. P. Heeney — mission record (1953–1957)","type":"Mission record","url":"https://w05.international.gc.ca/CHOMA-CDMCE/Posting/View/2376"},{"accessedOn":"","date":"","id":"mission-2bc18e88a181f97bbbe5","locator":"","publisher":"","title":"A. D. P. Heeney — mission record (1953–1957)","type":"Mission record","url":"https://www.canada.ca/en/privy-council/corporate/clerk/former.html"}],"topics":["wartime administration","NATO","International Joint Commission"]},"schemaVersion":1}