| Business | Phone |
| Remediation Technologies Ltd 249 Bennett Ln, Des Plaines 60016 | (847) 956-7587 |
| Herley Industries Inc 2250 E Devon Ave 211, Des Plaines 60018 | (630) 616-8633 |
| Land & Water Resources 9575 W Higgins Rd 901, Des Plaines 60018 | (847) 692-7170 |
| Synchem Inc 1700 S Mount Prospect Rd, Des Plaines 60018 | (847) 298-2436 |
| Acl Lab 9301 Golf Rd, Des Plaines 60016 | (847) 298-2051 |
| Cleveland Biolabs Inc 9450 Bryn Mawr Ave, Des Plaines 60018 | (847) 678-5337 |
| Green Smith Inc 5600 N River Rd, Des Plaines 60018 | (847) 993-3150 |
| Integrated Global Solutions 2860 S River Rd, Des Plaines 60018 | (847) 824-5511 |
| Lake Michigan Air Directors 2250 E Devon Ave 250, Des Plaines 60018 | (847) 296-2181 |
| Philips Electronics 10275 W Higgins Rd, Des Plaines 60018 | (847) 768-1485 |
| Speh Family Foundation 10700 W Higgins Rd, Des Plaines 60018 | (847) 299-7011 |
| Varian Associate 200 Howard Ave, Des Plaines 60018 | (847) 294-5899 |