John Gordon was the president of Public Service Alliance of Canada, a public service union in Canada.
John Gordon first joined PSAC in 1974 as a tradesperson with Public Works Canada.
In the 1980s he was a board member and Secretary-Treasurer for the Labour Council of Toronto.
From 1982 to 1999 he was the National President for the now defunct Union of Public Works Employees, which is now part of the Government Services Union.
On May 6, 2006 he was elected President of PSAC at the union's fourteenth triennial national convention in Toronto.