| Business | Phone |
| A M Innovations Inc 550 Parkside Dr #18a, Waterloo N2L 5V4 | (519) 883-0690 |
| Aaa Engineering 695 Mcmurray Rd #3, Waterloo N2V 2B7 | (519) 747-5861 |
| Amec Earth & Environmental Ltd 440 Phillip St #8, Waterloo N2L 5R9 | (519) 885-6220 |
| Giffels Associates Ltd 96 Rankin St #203, Waterloo N2V 2B6 | (519) 884-3822 |
| Robb Engineering Ltd 452 Ainsworth Crt, Waterloo N2T 1H5 | (519) 885-2115 |
| Johnston Engineering & Machine 631 Green Meadow Cres, Waterloo N2V 1E1 | (519) 746-5323 |
| Sze Straka Engineers Ltd 105 Baffin Pl #1, Waterloo N2V 2C1 | (519) 884-9881 |
| Ch2m Gore & Storrie Ltd 180 King St S #260, Waterloo N2J 1P8 | (519) 579-3500 |
| Ch2m Hill Canada Ltd 180 King St S #600, Waterloo N2J 1P8 | (519) 858-8800 |
| Cra Developments 651 Colby Dr, Waterloo N2V 1C2 | (519) 885-2555 |
| Cumming Cockburn Ltd 180 King St S #260, Waterloo N2J 1P8 | (519) 585-2255 |
| Delcan Corp 421 King St N, Waterloo N2J 4E4 | (519) 883-7883 |
| Demaiter Engineering Inc 421 King St N, Waterloo N2J 4E4 | (519) 725-3555 |