| Spicer Group, Inc. |
Saginaw |
989-754-4717 |
| Somat Engineering, Inc. |
Grand Rapids |
616-575-9230 |
| Somat Engineering, Inc. |
Detroit |
313-963-2721 |
| Somat Engineering, Inc. |
Taylor |
313-963-2721 |
| Soils & Structures, Inc. |
Muskegon |
231-798-4127 |
| Soils & Structures, Inc. |
Traverse City |
800-933-3959 |
| Soil and Materials Engineers, Inc. |
Indianapolis, IN |
317-876-0200 |
| Soil and Materials Engineers, Inc. |
Plymouth |
734-454-9900 |
| Soil and Materials Engineers, Inc. |
Shelby Township |
586-731-3100 |
| Soil and Materials Engineers, Inc. |
Bay City |
989-684-6050 |
| Soil and Materials Engineers, Inc. |
Cincinnati, OH |
513-898-9430 |
| Soil and Materials Engineers, Inc. |
Maumee, OH |
419-897-0409 |
| Soil and Materials Engineers, Inc. |
Kirtland, OH |
440-256-6500 |
| Soil and Materials Engineers, Inc. |
Traverse City |
231-941-5200 |
| Soil and Materials Engineers, Inc. |
Grand Rapids |
616-406-1756 |
| Soil and Materials Engineers, Inc. |
Kalamazoo |
269-323-3555 |
| Soil and Materials Engineers, Inc. |
Lansing |
517-887-9181 |
| Rowe Professional Services Company |
Flint |
810-341-7500 |
| PSI |
Grand Rapids |
616-459-0204 |
| PSI |
Troy |
248-528-1655 |
