| Business | Phone |
| Hinsdale Engineering 514 S Grant St, Hinsdale 60521 | (630) 323-7757 |
| James R Schueler 5502 S Madison St, Hinsdale 60521 | (630) 986-8162 |
| Omega Resource Group 15 Spinning Wheel Rd, Hinsdale 60521 | (630) 986-8116 |
| Ramm Associates 9 E 1st St, Hinsdale 60521 | (630) 455-4000 |
| Sharma & Assoc 5810 S Grant St, Hinsdale 60521 | (630) 655-4630 |
| Steven E Mardula 514 S Grant St, Hinsdale 60521 | (630) 323-1834 |
| Proton Equipment Co Po Box 3401, Hinsdale 60522 | (630) 268-8777 |