| Business | Phone |
| United Food & Coml Wkrs Union 6616 Ellis Rd Rr 22, Cambridge N3C 2V4 | (519) 658-0252 |
| International Union Of Engrs 101 Holiday Inn Dr #D, Cambridge N3C 1Z3 | (519) 658-4724 |
| Labourers' International Union 812 Lawrence St, Cambridge N3H 2N1 | (519) 653-3333 |
| United Brotherhood Carpenters 680 Fountain St N, Cambridge N3H 4R7 | (519) 653-7543 |
| United Steelworkers 510 Collier Macmillan Dr, Cambridge N1R 6R5 | (519) 740-3461 |
| Canadian Auto Workers 887 Langs Dr #13, Cambridge N3H 5K5 | (519) 650-2891 |
| Caw National Area Office 887 Langs Dr #11, Cambridge N3H 5K5 | (519) 653-2871 |
| Cupe 510 Collier Macmillan Dr, Cambridge N1R 6R5 | (519) 621-5557 |