| Business | Phone |
| Iue-Cwa Local 80400 55 Columbia St E, Waterloo N2J 4N7 | (519) 746-8140 |
| Mechanical Contractors Assn 420 Weber St N, Waterloo N2L 4E7 | (519) 885-0431 |
| Plumbers & Steamfitters Ua 225 Frobisher Dr, Waterloo N2V 2G4 | (519) 746-3300 |
| Waterloo Wellington Dufferin 225 Frobisher Dr, Waterloo N2V 2G4 | (519) 746-2889 |