| Business | Phone |
| Atkinson Davies Inc 60 Meg Dr #12, London N6E 3T6 | (519) 685-6400 |
| Golder Associates 500 Nottinghill Rd, London N6K 3P1 | (519) 471-9600 |
| Gray & Fick Ltd 133 Consortium Crt, London N6E 2S8 | (519) 681-6475 |
| Hastings & Aziz Consulting 200 Queens Ave #400, London N6A 1J3 | (519) 439-0161 |
| Intelligent Systems Design Ltd 383 Richmond St, London N6A 3C4 | (519) 671-5106 |
| Investig-Engineering Inc 120 Wellington St #302, London N6B 2K6 | (519) 432-3992 |
| Mardon Engineering Ltd 1329 Fuller St #4, London N5Y 4R1 | (519) 659-2264 |
| Melex Engineering Ltd 6 Bainard St, London N6P 1A8 | (519) 652-1193 |
| Mva Engineering Group Ltd 219 Consortium Crt, London N6E 2S8 | (519) 668-4698 |
| N A Engineering Assoc Inc 396 Oxford St E, London N6A 1V7 | (519) 432-0000 |
| P & T Design Svc Inc 96 Meg Dr, London N6E 3T7 | (519) 668-7687 |
| Peter T Mitches & Assoc Ltd 350 Ridout St S, London N6C 3Z5 | (519) 663-5550 |
| Pollard Engineering Ltd 1571 Jalna Blvd, London N6E 3K8 | (519) 685-2570 |
| Prt Wiancko & Assoc 772 Colborne St, London N6A 3Z9 | (519) 433-6885 |
| Sco-Terra Engineering 458 Queens Ave, London N6B 1X9 | (519) 434-0278 |
| Spriet Associates 155 York St, London N6A 1A8 | (519) 672-4100 |
| Technodesign Facilities Engrng 18 Andover Dr, London N6J 3W8 | (519) 652-9997 |
| Van Boxmeer & Stranges 458 Queens Ave, London N6B 1X9 | (519) 433-4661 |
| Vanderwesten & Rutherford Ltd 7242 Colonel Talbot Rd, London N6L 1H8 | (519) 652-5047 |
| Whitney Engineering Inc 630 Colborne St, London N6B 2V2 | (519) 432-0032 |
| Chorley & Bisset Ltd 369 York St #2b, London N6B 3R4 | (519) 679-8660 |
| Cumming Cockburn Ltd 350 Oxford St W, London N6H 1T3 | (519) 472-7328 |
| Dillon Consulting Ltd 495 Richmond St #200, London N6A 5A9 | (519) 438-6192 |
| Donato Engineering Inc 1288 Commissioners Rd W #200, London N6K 1E1 | (519) 473-5776 |
| Earth Tech Inc 285 King St #300, London N6B 3M6 | (519) 673-0510 |
| Emcad Consulting Engineers 642 Grandview Ave, London N6K 3G6 | (519) 641-3040 |
| Eng Plus Ltd 750 Base Line Rd E #101, London N6C 2R5 | (519) 438-6994 |