| Business | Phone |
| Abatangelo-Hason Ltd 53 W Jackson Blvd 1850, Chicago 60604 | (312) 663-9292 |
| Advance Consulting Group Intl 300 W Adams St 420, Chicago 60606 | (312) 357-1840 |
| Advanced Consulting Group Inc 5901 N Cicero Ave 603, Chicago 60646 | (773) 481-9500 |
| Allan H Gold Structural Engr 120 W Madison St 702b, Chicago 60602 | (312) 782-2600 |
| Asrow Sp Assoc Llc 332 S Michigan Ave 1152, Chicago 60604 | (312) 939-2150 |
| Blue Line Managers 567 W Lake St, Chicago 60661 | (312) 733-5276 |
| Galicia & Assoc 123 W Madison St 200, Chicago 60602 | (312) 553-9744 |
| Branco & Zroka Engineering 4216 N Hermitage Ave, Chicago 60613 | (773) 935-6376 |
| Burns & Mc Donnell 532 Tom Van Arden Dr, Chicago 60607 | (317) 398-2755 |
| Fisher & Partners Structural 372 W Ontario St 302, Chicago 60610 | (312) 573-1701 |
| C E Anderson & Assoc 175 N Franklin St 300, Chicago 60606 | (312) 750-1701 |
| Campbell & Assoc Consulting 400 W Erie St 407, Chicago 60610 | (312) 202-0082 |