| Business | Phone |
| L P Engineering Inc 11 Katerina Ave, Thornhill L4J 8H5 | (905) 709-5627 |
| Marshall Macklin Monaghan Ltd 80 Commerce Valley Dr E, Thornhill L3T 7N4 | (905) 882-1100 |
| Nik System Co 55 Glen Cameron Rd #2, Thornhill L3T 1P2 | (905) 763-4015 |
| Pressing Systems Inc 9040 Leslie, Thornhill | (905) 707-9185 |
| Ecotech International Systems 7880 Keele, Thornhill | (905) 761-8848 |
| Tenex Canada 60 Alexis Rd, Thornhill L3T 6Z8 | (905) 886-4181 |
| Deyong Engineering Ltd 81 Glen Cameron Rd, Thornhill L3T 1N8 | (905) 881-2427 |
| Earth Tech Canada Inc 105 Commerce Valley Dr W, Thornhill L3T 7W3 | (905) 886-7022 |
| Ben Engineering, Inc. 8171 Yonge Street, Suite 310, Thornhill L3T 2C6 | (416) 628-9690 |