| Business | Phone |
| Hastec Engineering Inc 45 Hannover Dr #8, St Catharines L2W 1A3 | (905) 687-9194 |
| J David Pounder Ltd 8 Warrington Pl, St Catharines L2N 2N5 | (905) 935-7580 |
| Joseph Tk Engineering Inc 341 Geneva St, St Catharines L2N 2G3 | (905) 934-7566 |
| Marine Survey & Svc 7 Gale Cres, St Catharines L2R 7M8 | (905) 682-4201 |
| Pen Engineering Ltd 198 King St, St Catharines L2R 3J7 | (905) 641-3043 |
| Robert M Martin Engineering 8 Centre St, St Catharines L2R 3A7 | (905) 687-4020 |
| V & S Engineering Group Ltd 53 Scott St W, St Catharines L2R 1E2 | (905) 687-9010 |
| Vandentech Engineering Ltd 26 Frederick St, St Catharines L2S 2S4 | (905) 892-0215 |
| Engineering Concepts Niagara 82 Lake St, St Catharines L2R 5X4 | (905) 687-7410 |
| Conestoga-Rovers & Assoc Ltd 261 Martindale, St Catharines L2W 1A2 | (905) 682-0510 |
| Consoil Quality Control 11 Neilson St, St Catharines L2M 5V9 | (905) 641-1162 |
| Cse Marine Svc 340 Lakeshore Rd E, St Catharines L2R 7C1 | (905) 646-8033 |