Name of Company | Contact | City | State | Phone |
| AEW Engineering, Inc. | Margaret A. Cieslik | Omaha | NE | 402-553-0982 |
| American Engineering Testing, Inc. | Brad Palmer | Pierre | SD | 605-224-9535 |
| Aquaterra Environmental Solutions, Inc. | Mike Miller | Omaha | NE | 402-884-6202 |
| Bay West, Inc. | Phil Dula | Lenexa | KS | 913-663-2915 |
| BEM Systems, Inc. | Greg Butler | Kansas City | MO | 816-842-7440 |
| Castle Construction Company | Kimberly D. Tate | Columbus | NE | 402-564-5554 |
| Clayton Group Services, Inc. | Monte M. Nienkerk | Downers Grove | IL | 630-795-3200 |
| Clayton Group Services, Inc. | Derek Wong | Novi | MI | 248-344-2661 |
| Conestoga-Rovers & Associates | Neil Leipzig | Omaha | NE | 402-778-4804 |
| Coranco Great Plains, Inc. | Dan Blankenau | Wahoo | NE | 402-443-4340 |
| Custom Environmental Services | Gerry Murt | Arvada | CO | 303-423-9949 |
| EA Engineering, Science & Technology | H. Lee Becker | Lincoln | NE | 402-476-3766 |
| Earth Sound, Inc. | Jim Kenny | McCook | NE | 308-345-7681 |
| Eneco Tech | John Lynch | Denver | CO | 303-861-2200 |
| ENSR Corporation | Wayne Lindsay | Ballwin | MO | |
| Environmental Professionals, Inc. | Paul Ziemba | Omaha | NE | 402-891-1112 |
| Environmental Solutions, Inc. | John Sempeck | Omaha | NE | 888-908-5700 |
| Evans Environmental Construction | Jeff Evans | Council Bluffs | IA | 712-366-5834 |
| Franklin Associates/McLaren/Hart, Inc. | David E. Brewer | Prairie Village | KS | 913-649-2225 |
| General Excavating | Mike Stewart | Lincoln | NE | 402-467-1627 |
| Geotechnical Services, Inc. | Fred Jones | Grand Island | NE | 308-381-1987 |
| Geotechnical Services, Inc. | Mel Cerny | Lincoln | NE | 402-466-8154 |
| Global Environmental Services | Dennis Collins | Council Bluffs | IA | 712-328-1000 |
| Haz-Mat Response, Inc. | Jeff Donovan | Olathe | KS | 800-229-5252 |
| HWS Consulting Group, Inc. | Owen Goodenkauf | Lincoln | NE | 800-279-4972 |
| John Prouty Construction, Inc. | John Prouty | O'Neill | NE | 402-336-4014 |
| Leggette, Brashears & Graham, Inc. | Scott Cumming | Kansas City | MO | 816-421-7766 |
| Liehs Drilling | Wes Liehs | Lexington | NE | 308-324-2303 |
| Maxim Technologies, Inc. | Scot Keith | Rapid City | SD | 605-348-5850 |
| Maxim Technologies | Mitch Kannenberg | Sioux Falls | SD | 605-332-5371 |
| MILCO Environmental Services, Inc. | Chris A. Miller | Kearney | NE | 308-237-5923 |
| 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 |
| Panhandle Geotechnical & Environmental, Inc. | David Weinert | Scottsbluff | NE | 308-632-6735 |
| PSA Environmental | Roger R. Sense | Lee Summit | MO | 816-525-7483 |
| 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 |
| Seneca Environmental Services, Inc. | Murray Nelson | Des Moines | IA | 402-431-0340 |
| Settje Agri Services & Engineering, Inc. | Dean Settje | Raymond | NE | 402-783-2100 |
| TCW Construction, Inc. | Christopher Boe | Lincoln | NE | 402-475-5030 |
| Terracon | David M. Svingen | Omaha | NE | 402-330-2202 |
| Tetra Tech, Inc. | Derek Dickinson | North Platte | NE | 308-534-5131 |
| Thiele Geotech, Inc. | Michael Gerdes | Omaha | NE | 402-556-2171 |
| Tri State Environmental Services, Inc. | Mark O'Harrow | Sioux City | IA | 712-276-2854 |
| West Central Environmental Consultants, Inc. | Gaylen Weisenburger | Morris | MN | 320-589-2039 |