| Business | Phone |
| A B Brogden Ltd 251 Vidal St N, Sarnia N7T 5Y5 | (519) 332-8630 |
| Ali-Khan Consulting 82 Finch Dr, Sarnia N7S 4T8 | (519) 337-2228 |
| Amec 870 Confederation St, Sarnia N7T 2E5 | (519) 337-5409 |
| Asi Group Ltd 120 Seaway Rd, Sarnia N7T 8A5 | (519) 383-7822 |
| Hi-Tech Engineering Sarnia 137 Kendall St, Sarnia N7V 4G6 | (519) 337-3881 |
| Leads Technical Group Inc 546 Christina St N, Sarnia N7T 5W6 | (519) 344-7021 |
| Paton Engineering Inc 501 Scott Rd, Sarnia N7T 8G3 | (519) 332-0060 |
| Protech Equipment Design 546 Christina St N #501, Sarnia N7T 5W6 | (519) 344-0735 |
| Robert E Dale Ltd 1149 Vanier Rd #1003, Sarnia N7S 3Y6 | (519) 337-7211 |
| Bkl Engineering Ltd 800 Upper Canada Dr, Sarnia N7W 1A4 | (519) 336-4292 |
| T W Gray & Assoc Engrng Ltd 907 Devine St, Sarnia N7T 1X3 | (519) 336-0486 |
| Tecsar Engineering Inc 117 Front St N, Sarnia N7T 7T1 | (519) 383-8028 |
| Tower Scan 834 Upper Canada Dr, Sarnia N7W 1A4 | (519) 344-7132 |
| Trow Consulting Engineers Ltd 265 Front St N, Sarnia N7T 5S6 | (519) 332-1550 |