| Business | Phone |
| Argue Burnside 130 Malcolm Rd, Guelph N1K 1B1 | (519) 836-0040 |
| Phoenix Consultants Inc 40 Christine Dr, Guelph N1H 6J2 | (519) 837-9941 |
| R M Montgomery Engineering Inc 291 Woodlawn Rd W #8a, Guelph N1H 7L6 | (519) 767-0514 |
| Tacoma Steckley & Assoc 176 Speedvale Ave W, Guelph N1H 1C3 | (519) 763-2000 |
| Braun Consulting Engineers Ltd 530 Willow Rd, Guelph N1H 7G4 | (519) 836-9892 |
| Computational Hydraulics Intl 36 Stuart St, Guelph N1E 4S5 | (519) 767-0197 |
| Eramosa Engineering Inc 176 Speedvale Ave W, Guelph N1H 1C3 | (519) 763-7774 |
| Gamsby & Mannerow Ltd 255 Woodlawn Rd W #210, Guelph N1H 8J1 | (519) 824-8150 |