| 1 | InSitu Soil Testing, LC | 17 | Michels |
| 2 | Froehling & Robertson | 18 | Catawba Valley Engineering & Testing |
| 3 | SEQ Drilling, Inc. | 19 | Stable Ground In-Situ, LLC |
| 4 | Keller | 20 | River Shore Marine |
| 5 | ICOP (formerly GeoStructures) | 21 | Connelly & Associates, Inc. |
| 6 | Menard | 22 | Wurster Betterground |
| 7 | Tensar | 23 | Williams Form Engineering |
| 8 | GRL Engineers, Inc. / Pile Dynamics, Inc. | 24 | CJ Geo |
| 9 | Wagman Heavy Civil, Inc. | 25 | Dulles Geotechnical and Materials Testing |
| 10 | NCFI Geotechnical | 26 | GeoDin / Fugro |
| 11 | ECS Mid-Atlantic, LLC | 27 | Ischebeck USA, Inc. |
| 12 | Conetec | 28 | Subsurface Constructors, Inc. |
| 13 | Berkel | 29 | Geoquest USA |
| 14 | DuroTerra | 30 | Hillis-Carnes Engineering Associates |
| 15 | Morris Shea | 31 | Orica Digital Solutions |
| 16 | Aero Aggregates | 32 | Subsurface Construction Company, LLC |
