| Business | Phone |
| Ams Mechanical Systems Inc 140 Tower Dr, Willowbrook 60527 | (630) 887-7700 |
| Harless Consulting Group 4 Bel Aire Ct, Willowbrook 60527 | (630) 789-1706 |
| Midwest Mechanical Inc 7615 Plaza Ct, Willowbrook 60527 | (630) 655-8056 |
| Midwest Mechanical Svc 540 Executive Dr, Willowbrook 60527 | (630) 850-2300 |
| Public Payphones Inc 6900 Kingery Hwy, Willowbrook 60527 | (630) 654-2928 |
| Take Charge Electric 7615 Virginia Ct, Willowbrook 60527 | (630) 920-0774 |