| Business | Phone |
| Amec 95 Cumberland St N, Thunder Bay P7A 4M1 | (807) 344-7218 |
| Hilleri Consultants Ltd 679 Leslie Ave, Thunder Bay P7A 1Z9 | (807) 345-0845 |
| Himanen & Assoc 1060 Gorham St, Thunder Bay P7B 5X5 | (807) 623-3936 |
| Jml Engineering Ltd 105 Villa St, Thunder Bay P7A 7W5 | (807) 345-1131 |
| Kembel Group Inc 123 Brodie St S #2, Thunder Bay P7E 1B8 | (807) 622-1602 |
| Kgs Group Inc 560 Squier Pl, Thunder Bay P7B 6M2 | (807) 345-2233 |
| Lamba & Assoc 579 Maureen St, Thunder Bay P7B 6T2 | (807) 343-5494 |
| Laurentian Engineering Group 740 Syndicate Ave S, Thunder Bay P7E 1E9 | (807) 623-7153 |
| Lynx North Engineering Inc 200 Johnson Ave, Thunder Bay P7B 6C3 | (807) 345-3209 |
| Profor Engineering Svc 200 Syndicate Ave S # 5 #502, Thunder Bay P7E 1C9 | (807) 623-3013 |
| Uma 91 Cumberland St S, Thunder Bay P7B 6A7 | (807) 345-9099 |
| C E Mickelson Assoc Ltd 179 Algoma St S, Thunder Bay P7B 3C1 | (807) 345-0557 |
| Cook Engineering 740 Syndicate Ave S, Thunder Bay P7E 1E9 | (807) 625-6700 |
| D F Barritt Drive Svc Inc Mitchell Rd, Thunder Bay P7B 6B3 | (807) 683-5548 |