Tom Siddon, the former Canadian cabinet minister who played a key role during some of the country’s most defining political moments, has died at the age of 84.
His daughter, Katie Siddon Karn, confirmed that Siddon passed away on June 28, 2026. In a heartfelt tribute, she remembered her father as an intelligent leader, bridge-builder and devoted family man who dedicated much of his life to public service.
Born in Drumheller, Alberta, on November 9, 1941, Siddon was trained as an aerospace engineer before entering politics. After serving as a city councillor in Richmond, British Columbia, he was elected to Canada’s House of Commons in 1978 and went on to serve five consecutive terms as a Member of Parliament.
During his political career, Siddon held several senior cabinet positions under Prime Minister Brian Mulroney, including Minister of Fisheries and Oceans, Minister of Indian Affairs and Northern Development, and later Minister of National Defence. He became one of the central federal figures during the 1990 Oka Crisis, a 78-day standoff between Mohawk protesters, police and the Canadian military over disputed Indigenous land near Montreal. While his handling of the crisis drew criticism from some, Siddon maintained that it helped spark meaningful progress on Indigenous land claims and treaty negotiations in Canada.
One of the achievements he remained most proud of was helping secure the Nunavut Land Settlement Agreement, which paved the way for the creation of Canada’s newest territory in 1999. His work also contributed to major treaty negotiations and Indigenous governance initiatives across the country.
After leaving federal politics following the 1993 election, Siddon remained active in public life. He served on local school and regional boards in British Columbia, advocated for environmental and water stewardship, and continued to mentor young leaders and participate in public policy discussions.
Tributes from former colleagues and political leaders have described Siddon as a thoughtful public servant who valued consensus, education and service above partisanship. He is survived by his wife, Pat, their five children and 11 grandchildren.
Tom Siddon’s career spanned engineering, politics and community service, leaving a lasting mark on Canada’s political history and the development of several landmark national policies.