| Business | Phone |
| Apw Systems 777 St Clair St, Chatham N7M 5J7 | (519) 354-2021 |
| Barry Consulting Inc 65 Adelaide St S, Chatham N7M 4R1 | (519) 354-5880 |
| Thames Valley Engineering Inc 392 Park Ave E #100, Chatham N7M 5Y5 | (519) 354-2193 |
| Todgham & Case Assoc Inc 131 Heritage Rd, Chatham N7M 5W7 | (519) 354-0400 |
| Y C Liu Engineering Svc 23 Mcgregor Pl, Chatham N7M 5J4 | (519) 351-9612 |
| David G Mc George Ltd 5 Sixth St, Chatham N7M 4V1 | (519) 352-2722 |
| David A Mc Lean & Assoc 330 Richmond St #200, Chatham N7M 1P7 | (519) 351-8155 |
| Dillon Consulting Ltd 440 Park Ave W, Chatham N7M 1X2 | (519) 354-7802 |