| Business | Phone |
| Therrien Industrial Consulting 940 Patricia Ln, Crete 60417 | (708) 672-7935 |
| Strategic Insights Ltd 25 Zurich Ct, Crete 60417 | (708) 757-0510 |
| R J Peloquin & Assoc 3343 E Burville Rd, Crete 60417 | (708) 672-5008 |
| Midwest Management Systems 23943 S Plum Valley Dr, Crete 60417 | (708) 672-0271 |