| Business | Phone |
| Allen Kani Assoc 292 Merton St #2, Toronto M4S 1A9 | (416) 488-4425 |
| Amec Inc 36 Toronto St #550, Toronto M5C 2C5 | (416) 644-3621 |
| Association Of Architectural 1515 Matheson Blvd E, Toronto | (416) 238-7594 |
| Globe Network Integrators Inc 240 Richmond St W, Toronto M5V 1V6 | (416) 597-0737 |
| Halsall Associated Ltd 2300 Yonge St #2300, Toronto M4P 1E4 | (416) 487-5256 |
| Hidi Rae Consulting Engineers 1 Yonge St #2100, Toronto M5E 1E5 | (416) 364-2100 |
| Holomax Limited 14 Hazelton Ave #A, Toronto M5R 2E2 | (416) 928-5960 |
| Joseph Lee Engineering Co Ltd 741 Gerrard St E, Toronto M4M 1Y5 | (416) 778-0271 |
| Keen Engineering Co Ltd 372 Bay St #1800, Toronto M5H 2W9 | (416) 366-0220 |
| Kofman Development Group Inc 70 Elwood Blvd, Toronto M5N 1G8 | (416) 482-5339 |
| Nuptek Systems Ltd 15 Mcmurrich St, Toronto M5R 3M6 | (416) 925-7231 |
| Ontario Civil Engineering Co 423 Queen St W, Toronto M5V 2A5 | (416) 597-9091 |
| Primary Power Technical Svc 140 Erskine Ave #2017, Toronto M4P 1Z2 | (416) 484-9326 |
| Project Planning Fsc 150 Eglinton Ave E #801, Toronto M4P 1E8 | (416) 440-1556 |
| Blackwell Engineering Ltd 19 Duncan St #405, Toronto M5H 3H1 | (416) 593-5300 |
| Bms Engineering Ltd 45 Southport St #609, Toronto M6S 3N5 | (416) 760-0285 |
| Roscoe Postle Assoc Inc 55 University Ave #1210, Toronto M5J 2H7 | (416) 947-0907 |
| Rosa V Building Design Ltd 1726 St Clair Ave W, Toronto M6N 1J1 | (416) 588-0001 |
| Rwa Engineering Inc 50 Russell St, Toronto M5S 1B7 | (416) 323-0576 |
| Southampton Associates Inc 67 Yonge St #808, Toronto M5E 1J8 | (416) 601-1444 |
| Weinstein Taylor & Assoc 100 Broadview Ave, Toronto M4M 3H3 | (416) 463-6662 |
| Bogdan Engineering Ltd 288 Danforth Ave #A, Toronto M4K 1N6 | (416) 461-7654 |
| Chemical Engineering Research 200 College St, Toronto M5S 3E5 | (416) 979-2013 |
| Chemitec Inc 2175 Dunwin Dr #11, Toronto | (905) 820-3653 |
| Cochrane Engineering Ltd 55 Eglinton Ave E #804, Toronto M4P 1G8 | (416) 504-2991 |
| Enermodal Engineering Ltd 2300 Yonge St, Toronto M4P 1E4 | (519) 743-8777 |
| Extreme Measures Inc 2 Gloucester St, Toronto M4Y 1L5 | (416) 323-2858 |
| Forbes Engineering & Mgmt 145 St. George St #108, Toronto M5R 2M1 | (416) 968-0094 |
| G & M Technical Svc 1029 Queen St E, Toronto M4M 1K3 | (416) 778-6553 |