| Business | Phone |
| S-B Engineering & Surveying 320 11th Ave Se 223, Cedar Rapids 52401 | (319) 298-8888 |
| Snyder & Assoc Inc 5005 Bowling St Sw A, Cedar Rapids 52404 | (319) 362-9394 |
| Seh 9280 Deer Valley Dr, Cedar Rapids 52411 | (319) 378-0760 |
| Brain Engineering Inc 1540 Midland Ct Ne, Cedar Rapids 52402 | (319) 294-9424 |
| Maatta Engineering Po Box 8201, Cedar Rapids 52408 | (319) 390-1175 |