- Amalgamated Transit Union Canadian Council
- Canadian Union of Postal Workers
- Canadian Union of Public Employees
- International Association of Fire Fighters
- International Brotherhood of Electrical Workers
- Labourers' International Union of North America
- Ontario English Catholic Teachers Association
- Ontario Public Service Employees Union
- Ontario Secondary School Teachers' Federation
- Public Service Alliance of Canada
- The Elementary Teachers' Federation of Ontario
- Unifor - The Union Canada
- United Food Commercial Workers