Name of Company | Contact | City | State | Phone |
| American Engineering Testing, Inc. | Brad Palmer | Pierre | SD | 605-224-9535 |
| American Engineering Testing, Inc. | Robert Temme | Rapid City | SD | 605-388-0064 |
| ANLAB Environmental | Bobby E. Henderson | Kansas City | MO | 819-421-0451 |
| Aquaterra Environmental Solutions, Inc. | Mike Miller | Omaha | NE | 402-884-6202 |
| ASW Associates, Inc. | Marshall Prichard | Lincoln | NE | 402-488-3983 |
| ATC Associates, Inc. | David Christensen | Omaha | NE | 402-697-9747 |
| Baker & Associates | John Baker | Scottsbluff | NE | 308-632-3123 |
| Bartlett & West Engineers, Inc. | Galen S. Lay | St. Joseph | MO | 816-364-3551 |
| BE&K/Terranext | Steve Peck | Lakewood | CO | 303-914-1700 |
| BEM Systems, Inc. | Greg Butler | Kansas City | MO | 816-842-7440 |
| Billings & Associates, Inc. | Brad Billings | Albuquerque | NM | 505-345-1116 |
| Burns & McDonnell | Jim Foil | Kansas City | MO | 816-822-3180 |
| Clayton Group Services, Inc. | Monte M. Nienkerk | Downers Grove | IL | 630-795-3200 |
| Conestoga-Rovers & Associates | Neil Leipzig | Omaha | NE | 402-778-4804 |
| Coranco Great Plains, Inc. | Dan Blankenau | Wahoo | NE | 402-443-4340 |
| DPRA, Inc. | Mary Lou Marino | Manhattan | KS | 913-539-3565 |
| Earthsource Consulting | Dr. Sanford S. Kaplan | Lincoln | NE | 402-785-3213 |
| Ecology & Environmental, Inc. | John Caoile | Overland Park | KS | 913-432-9961 |
| Ehrhart Griffin & Associates | Robert G. Griffin | Omaha | NE | 402-551-0631 |
| Eneco Tech | John Lynch | Denver | CO | 303-861-2200 |
| Geologic Solutions | James Kearney | Lincoln | NE | 402-489-2754 |
| Geotechnical Services, Inc. | Fred Jones | Grand Island | NE | 308-381-1987 |
| Geotechnical Services, Inc. | Mel Cerny | Lincoln | NE | 402-466-8154 |
| Geotechnical Services, Inc. | Brian Norton | Omaha | NE | 402-339-6104 |
| 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 |
| Harding ESE | Tom Colwell | Lincoln | NE | 402-421-7755 |
| HDR Engineering | Tim Crockett | Omaha | NE | 402-399-1257 |
| 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 |
| IT Corporation | Doug Trail | Urbandale | IA | 515-252-0234 |
| Jacobson Satchell Consultants | Dale Jacobson | Omaha | NE | 402-697-0701 |
| John Prouty Construction, Inc. | John Prouty | O'Neill | NE | 402-336-4014 |
| Lashley Feedlot Development and Consulting | Bud Lashley | Curtis | NE | 308-367-4336 |
| Layne Western | Tom Correll | Valley | NE | 402-359-2042 |
| Liehs Drilling | Wes Liehs | Lexington | NE | 308-324-2303 |
| Liesch Associates, Inc. | Ken Olson | Plymouth | MN | 612-559-1423 |
| M.C. Schaff & Associates, Inc. | M.C. Schaff | Scottsbluff | NE | 308-635-1926 |
| MACTEC Engineering & Consulting, Inc. | Tom Colwell | Lincoln | NE | 402-421-7755 |
| Marc Enviro Services, Inc. | Mark Schafer | Omaha | NE | 402-492-8025 |
| Maxim Technologies | Mitch Kannenberg | Sioux Falls | SD | 605-332-5371 |
| Maxim Technologies, Inc. | Derek Dickinson | North Platte | NE | 308-534-5131 |
| Mid-State Engineering & Testing, Inc. | Jim Musilek | Columbus | NE | 402-562-7824 |
| 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 |
| Natural Resource Group, LLC | Todd Potas | Minneapolis | MN | 612-347-6789 |
| Olsson Associates | Ryan Nelson | Grand Island | NE | 308-384-8750 |
| Olsson Associates | John Olsson | Lincoln | NE | 402-474-6311 |
| Olsson Associates | Lou lamberty | Omaha | NE | 402-341-1116 |
| Olsson Environmental Sciences, Inc. | Jeffrey S. Johnson | Lincoln | NE | 402-474-6320 |
| Panhandle Geotechnical & Environmental, Inc. | David Weinert | Scottsbluff | NE | 308-632-6735 |
| Peterson Drilling, Inc. | Chris Peterson | Riverdale | NE | 308-893-4293 |
| Philip Environmental Services | Beverly Roberts | Columbia | IL | 618-281-7173 |
| Pinnacle Engineering, Inc. | Steve Schleicher | Rochester | MN | 507-280-5966 |
| Professional Environmental Solutions | Vaden Hellerich | Valparaiso | NE | 402-817-3942 |
| RDG Geoscience & Engineering, Inc. | Bob Kalinski | Omaha | NE | 402-894-2678 |
| Rocky Mountain Pump Service, Inc. | David Weinert | Scottsbluff | NE | 308-632-5545 |
| Roy F. Weston, Inc. | Rodney Kirch | Vernon Hills | IL | 847-918-4149 |
| Roy F. Weston, Inc. | Ben Noller | Lakewood | CO | 303-980-6800 |
| Safety-Kleen Consulting, Inc. | Mark Gallup | Boulder | CO | 303-938-5565 |
| Solstice Company, Inc. | Pete Mackenhaupt | Omaha | NE | 402-730-0367 |
| Sverdrup Civil, Inc. | Mike Hill | Overland Park | KS | 913-663-2101 |
| Terracon | David M. Svingen | Omaha | NE | 402-330-2202 |
| Tetra Tech EM Inc. | Kathleen Homer | Lenexa | KS | 913-894-2600 |
| Tetra Tech EM Inc. | Steve Holmes | Lincoln | NE | 402-420-6228 |
| GTetra Tech, Inc. | Derek Dickinson | North Plate | NE | 308-534-5131 |
| Thiele Geotech, Inc. | Michael Gerdes | Omaha | NE | 402-556-2171 |
| Thompson, Dreessen & Dorner | Arthur D. Beccard | Omaha | NE | 402-330-8860 |
| TriState Environmental Services | Mark O'Harrow | Sioux City | IA | 712-276-2854 |
| URS Corporation | Christie Kampschneider | Omaha | NE | 402-334-8181 |
| W. Design Associates | Steven W. Wolford | Hastings | NE | 402-463-2377 |
| W. Design Associates | Greg Wolford | McCook | NE | 308-345-2370 |
| W. Design Associates | Ed Rieker | North Platte | NE | 308-534-9211 |