| Business | Phone |
| Grumman-Butkus Assoc 820 Davis St 300, Evanston 60201 | (847) 328-3555 |
| J N Engineering Co 2901 Central St, Evanston 60201 | (847) 869-0789 |
| Harza Environmental Svc 1122 Dodge Ave, Evanston 60202 | (847) 328-9675 |
| Moshe Calamaro & Assoc 1318 Oakton St, Evanston 60202 | (847) 733-0015 |
| Wolfson Engineering 726 Michigan Ave, Evanston 60202 | (847) 475-0183 |
| Optonet Inc 828 Davis St 206, Evanston 60201 | (847) 425-7585 |
| Skgg Inc 2131 Ridge Ave H, Evanston 60201 | (847) 491-1272 |
| Michael L Smith & Assoc 540 Forest Ave, Evanston 60202 | (847) 864-4070 |
| Mwh Americas Inc 1122 Dodge Ave, Evanston 60202 | (847) 328-9656 |
| Weber Associates 1234 Sherman Ave, Evanston 60202 | (847) 869-2164 |
| Weiland Consulting Co 1012 Hinman Ave, Evanston 60202 | (847) 864-8500 |
| Paul Gilson Consulting Assoc 9525 Drake Ave, Evanston 60203 | (847) 675-7957 |