| Business | Phone |
| Ats Test Systems Inc 600 Chrislea Rd, Woodbridge L4L 8K9 | (905) 850-8600 |
| Hannigan Engineering Ltd 40 Winges Rd, Woodbridge L4L 6B2 | (905) 850-4400 |
| Mastrodicasa Engineering Ltd 571 Chrislea Rd, Woodbridge L4L 8A2 | (905) 856-2530 |
| William Leung Assoc 190 Marycroft Ave #12, Woodbridge L4L 5Y2 | (905) 851-9535 |
| Construction Control Inc 70 Haist Ave, Woodbridge L4L 5V4 | (905) 856-5200 |
| G-Tel 200 Hanlan Rd, Woodbridge L4L 3P6 | (905) 856-1162 |