| Business | Phone |
| Kmh Engineering Inc 200 Syndicate Ave S #502, Thunder Bay P7E 1C9 | (807) 625-9950 |
| Norall Group Inc 229 Pearl St #101, Thunder Bay P7B 1E3 | (807) 346-0346 |
| Peterson & Habib Consultants 1151 Barton St #203, Thunder Bay P7B 5N3 | (807) 623-1021 |
| Starling Engineering 107 Cumberland St N, Thunder Bay P7A 4M3 | (807) 345-6855 |
| Tbt Engineering 101 Syndicate Ave N #314, Thunder Bay P7C 3V4 | (807) 624-5160 |
| Telecom Engineering 1179 Carrick St, Thunder Bay P7B 6M3 | (807) 624-1460 |
| Todd Lowey & Assoc Ltd 801 Vickers St N, Thunder Bay P7C 4B9 | (807) 625-5430 |
| Trow Consulting Engineers 807 Harold Cres, Thunder Bay P7C 5H8 | (807) 623-9495 |
| Corrosion Probe Inc 115 Sequoia Cres, Thunder Bay P7B 5T6 | (807) 768-8977 |
| Colm Quality Surveying 218 Tupper St, Thunder Bay P7A 3Y3 | (807) 345-1389 |
| Cuthbertson 936 Tungsten St, Thunder Bay P7B 5Z6 | (807) 344-3010 |
| Czinkota Engineering Svc 500 May St N, Thunder Bay P7C 3R6 | (807) 622-5464 |
| Dst Consulting Engineers 605 Hewitson St, Thunder Bay P7B 5V5 | (807) 623-2929 |
| Eagle Engineering 138 May St S #4, Thunder Bay P7E 1B3 | (807) 624-2171 |
| Engineering Northwest Ltd 200 Syndicate Ave S #301, Thunder Bay P7E 1C9 | (807) 623-3449 |
| Sostratus Engineering Ltd. 208 - 73 N. Cumberland Street, Thunder Bay P7A4L8 | (807) 346-1340 |