| Business | Phone |
| A F Of L Carpenters & Joiners 151 Indian Rd S, Sarnia N7T 3W3 | (519) 344-2352 |
| A F Of L Millwright 1151 Confederation St, Sarnia N7S 3Y5 | (519) 337-7021 |
| A F Of L Painters & Decorators 1151 Confederation St, Sarnia N7S 3Y5 | (519) 337-3791 |
| A F Of L Plumbers Pipefitters 1151 Confederation St, Sarnia N7S 3Y5 | (519) 337-6569 |
| A F Of L Sheet Metal Workers 1151 Confederation St, Sarnia N7S 3Y5 | (519) 344-6725 |
| International Brotherhood Elec 701 Ontario St, Sarnia N7T 1M3 | (519) 344-4154 |
| Intl Assn Of Bridge & Iron Wrk 1350 L'Heritage Dr, Sarnia N7S 6H8 | (519) 542-1413 |
| International Union Of Engrs 1390a Lougar Ave, Sarnia N7S 5N7 | (519) 337-2053 |
| Labourers' International Union 1255 Confederation St, Sarnia N7S 4M7 | (519) 332-1089 |
| Local 672 900 Devine St, Sarnia N7T 1X5 | (519) 336-4557 |
| Office & Professional Emplys 900 Devine St, Sarnia N7T 1X5 | (519) 344-2929 |
| Ontario Secondary School Tchrs 50 Ube Dr, Sarnia N7W 1B6 | (519) 542-1600 |
| Sarnia Building & Construction 1390 Lougar Ave #A, Sarnia N7S 5N7 | (519) 344-4680 |
| Canadian Automobile Workers 368 Campbell St, Sarnia N7T 2H6 | (519) 344-4111 |
| Canadian Union Of Postal Wrkrs 145 Wellington St, Sarnia N7T 1G4 | (519) 337-4297 |
| Cep 900 Devine St, Sarnia N7T 1X5 | (519) 344-1022 |
| Cep Local 848 900 Devine St, Sarnia N7T 1X5 | (519) 336-7456 |
| Comm Energy & Paperworkers 900 Devine St, Sarnia N7T 1X5 | (519) 332-4102 |