| Business | Phone |
| Booz Allen Hamilton 1728 Corporate Xing, O Fallon 62269 | (618) 622-2330 |
| Mid-America Energy & Mining 138 Eagle Dr, O Fallon 62269 | (618) 624-0155 |
| Mcr Federal 9 Eagle Ctr 7, O Fallon 62269 | (618) 624-2804 |
| Lop Consulting Llc 717 Saint Nicholas Dr, O Fallon 62269 | (618) 632-5707 |