| Business | Phone |
| Impact Solutions 3 Bradley Pl, Sarnia N7V 4H6 | (613) 392-1900 |
| Jacobs Canada 2109 London Line, Sarnia N7T 7H2 | (519) 542-1285 |
| Langtree Controls Ltd 509 Vidal St S, Sarnia N7T 2V5 | (519) 344-6868 |
| Mac Laren, James W 1285 Sandy Lane, Sarnia N7V 4J7 | (519) 344-2241 |
| Mig Engineering Ltd 453 Christina St N, Sarnia N7T 5W3 | (519) 337-8000 |
| Snc-Lavalin Engrs & Cnstctrs 265 Front St N #301, Sarnia N7T 7X1 | (519) 336-0201 |
| Collins Ferrera Engineering 527 Murphy Rd #201, Sarnia N7S 5B6 | (519) 336-2795 |
| Colt Engineering Corp 1086 Modeland Rd #2, Sarnia N7S 6L2 | (519) 332-0160 |
| Elecsar Engineering Ltd 1149 Vanier Rd #1001, Sarnia N7S 3Y6 | (519) 337-6580 |