Name of Company | Contact | City | State | Phone |
| Agricultural Engineering Associates | John George | Uniontown | KS | 316-756-4600 |
| AIM Environmental Consulting | Harold Nagel | Kearney | NE | 308-234-1749 |
| American Engineering Testing, Inc. | Robert Temme | Rapid City | SD | 605-224-9535 |
| ANLAB Environmental | Bobby E. Henderson | Kansas City | MO | 819-421-0451 |
| AquAeTer, Inc. | Steve Wampler | Englewood | CO | 303-771-9150 |
| Aquaterra Environmental Solutions, Inc. | Mike Miller | Omaha | NE | 402-884-6202 |
| Barker, Lemar & Associates, Inc. | Mike Barker | Des Moines | IA | 515-256-8814 |
| Bay West, Inc. | Phil Dula | Lenexa | KS | 913-663-2915 |
| BE&K/Terranext | Steve Peck | Lakewood | CO | 303-914-1700 |
| Burns & McDonnell | Jim Foil | Kansas City | MO | 816-822-3180 |
| Cascade Earth Sciences | Jonathan Paetz | Valley | NE | 402-359-6008 |
| Coranco Great Plains, Inc. | Dan Blankenau | Wahoo | NE | 402-443-4340 |
| Eneco Tech | John Lynch | Denver | CO | 303-861-2200 |
| Enviro Service | Marty McCafferty | Scottsbluff | NE | 308-632-3933 |
| Enviro Tech Services, Inc. | Jack Eslick | Salina | KS | 785-827-1682 |
| Environmental Professionals, Inc. | Paul Ziemba | Omaha | NE | 402-891-1112 |
| Franklin Associates/McLaren/Hart, Inc. | David E. Brewer | Prairie Village | KS | 913-649-2225 |
| Geotechnical Services, Inc. | Fred Jones | Grand Island | NE | 308-381-1987 |
| Geotechnical Services, Inc. | Mel Cerny | Lincoln | NE | 402-466-8154 |
| GeoTek Engineering & Testing | Mike Meyer | Sioux Falls | SD | 605-335-5512 |
| Golder Associates, Inc. | Dean Rector | Lakewood | CO | 800-235-7784 |
| Hanson Professional Services, Inc. | Curt Krueger | Kansas City | MO | 816-701-3102 |
| Hollingsworth Associates, Inc. | Harold Hollingsworth | Sheridan | CO | 303-781-5188 |
| Howard Green Company | Michael G. Fisher | Cedar Rapids | IA | |
| HWS Consulting Group, Inc. | Owen Goodenkauf | Lincoln | NE | 800-279-4972 |
| Hydro-Logic, Inc. | Marlene Dulaney | Eudora | KS | 785-542-2518 |
| Inberg-Miller Engineers | Lawrence Wright | Cheyenne | WY | 307-635-6827 |
| Lashley Feedlot Development and Consulting | Bud Lashley | Curtis | NE | 308-367-4336 |
| Layne Western, division of Layne Christensen Co. | Tom Correll | Valley | NE | 402-359-2042 |
| Leggette, Brashears & Graham, Inc. | Robert M. Rohlfs | Liberty | MO | 816-421-7766 |
| Lenz Environmental, Inc. | Brian Lenz | West Des Moines | IA | 515-221-3993 |
| Liehs Drilling | Wes Liehs | Lexington | NE | 308-324-2303 |
| Maxim Technologies | Mitch Kannenberg | Sioux Falls | SD | 605-332-5371 |
| Maxim Technologies, Inc. | Derek Dickinson | North Platte | NE | 308-534-5131 |
| Mid State Engineering and Testing | Kevin Christensen | Kearney | NE | 308-234-9959 |
| Miller & Associates | Reed Miller | Kearney | NE | 308-234-6456 |
| Miller & Associates | Chris Miller | McCook | NE | 308-345-3710 |
| Montgomery Watson | Michael Geringer | Des Moines | IA | 515-253-0830 |
| Norm Koester Engineering | Norman D. Koester | Plattsmouth | NE | 402-235-3936 |
| Olsson Associates | Kevin L. Prior | Grand Island | NE | 308-384-8750 |
| Olsson Environmental Sciences, Inc. | Jeffrey S. Johnson | Lincoln | NE | 402-474-6320 |
| Pace Analytical Services, Inc. | Blane Wood | Lenexa | KS | 913-563-1452 |
| Pace Analytical Services, Inc. | Thomas Halverson | Minneapolis | MN | 612-607-6398 |
| Panhandle Geotechnical & Environmental, Inc. | David Weinert | Scottsbluff | NE | 308-632-6735 |
| RDG Geoscience & Engineering, Inc. | Bob Kalinski | Omaha | NE | 402-894-2678 |
| Roy F. Weston, Inc. | Ben Noller | Lakewood | CO | 303-980-6800 |
| Servi-Tech Laboratories | Brian Shreve | Hastings | NE | 800-468-5411 |
| Settje Agri-Services & Engineering, LLC | Dean Settje | Raymond | NE | 402-783-2100 |
| SOLSTICE CO | Jay Baier | Huxley | IA | 515-291-4221 |
| Terracon | David M. Svingen | Omaha | NE | 402-330-2202 |
| Tetra Tech EM Inc. | Kathleen Homer | Lenexa | KS | 913-894-2600 |
| Thiele Geotech, Inc. | Michael Gerdes | Omaha | NE | 402-556-2171 |
| Thompson, Dreessen & Dorner | Arthur D. Beccard | Omaha | NE | 402-330-8860 |
| URS Corporation | Christie Kampschneider | Omaha | NE | 402-334-8181 |