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 |
| American Engineering Testing, Inc. | Robert Temme | Rapid City | SD | 605-388-0029 |
| ANLAB Environmental | Bobby E. Henderson | Kansas City | MO | 819-421-0451 |
| Apex Environmental, Inc. | James Marek | Urbandale | IA | 515-727-8025 |
| Applied Technology, Inc. | Ron Woods | Fishers | IN | 317-842-0722 |
| AquAeTer, Inc. | Steve Wampler | Englewood | CO | 303-771-9150 |
| 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 |
| Barker, Lemar & Associates, Inc. | Mike Barker | Des Moines | IA | 515-256-8814 |
| Bartlett & West Engineers, Inc. | Galen S. Lay | St. Joseph | MO | 816-364-3551 |
| Bay West, Inc. | Phil Dula | Lenexa | KS | 913-663-2915 |
| 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 |
| CAPE Environmental Management, Inc. | Dezso Linbrunner | Bellevue | NE | 402-291-8533 |
| Cascade Earth Sciences | Jonathan Paetz | Valley | NE | 402-359-6008 |
| 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 |
| CRC & Associates, Inc. | Cheryl R. Cohenour | Tulsa | OK | 918-582-9110 |
| EA Engineering, Science & Technology | H. Lee Becker | Lincoln | NE | 402-476-3766 |
| Earthsource Consulting | Dr. Sanford S. Kaplan | Lincoln | NE | 402-785-3213 |
| Ecology & Environmental, Inc. | John Caoile | Overland Park | KS | 913-432-9961 |
| Eneco Tech | John Lynch | Denver | CO | 303-861-2200 |
| ENSR Corporation | Wayne Lindsay | Ballwin | MO | |
| Enviro Tech Services, Inc. | Jack Eslick | Salina | KS | 785-827-1682 |
| Environmental Professionals, Inc. | Paul Ziemba | Omaha | NE | 402-891-1112 |
| Epoch Environmental | Robin Husman | Bettendorf | IA | 800-373-5325 |
| Fox Engineering Associates | David Fox | Ames | IA | 515-233-0000 |
| Franklin Associates/McLaren/Hart, Inc. | David E. Brewer | Prairie Village | KS | 913-649-2225 |
| 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 |
| Kirkham Michael | Johnna Roberts | Omaha | NE | 402-255-3827 |
| Layne Western, division of Layne Christensen Co. | Tom Correll | Valley | NE | 402-359-2042 |
| Leggette, Brashears & Graham, Inc. | Scott Cumming | Kansas City | MO | 816-421-7766 |
| Leggette, Brashears & Graham, Inc. | Tim Kenyon | Sioux Falls | SD | 605-334-6000 |
| Liehs Drilling | Wes Liehs | Lexington | NE | 308-234-2303 |
| Liesch Associates, Inc. | Ken Olson | Plymouth | MN | 612-559-1423 |
| MACTEC Engineering & Consulting, Inc. | Tom Colwell | Lincoln | NE | 402-421-7755 |
| Marc Enviro Services, Inc. | Mark Schafer | Omaha | NE | 402-492-8025 |
| Maxim Technologies, Inc. | Scot Keith | Rapid City | SD | 605-348-5850 |
| Maxim Technologies | Mitch Kannenberg | Sioux Falls | SD | 605-332-5371 |
| Maxim Technologies, Inc. | Derek Dickinson | North Platte | NE | 308-534-5131 |
| MFG, Inc. | Connie Determan | Omaha | NE | 402-933-1345 |
| Mid-State Engineering & Testing, Inc. | Jim Musilek | Columbus | NE | 402-562-7824 |
| Mid State Engineering and Testing | Kevin Christensen | Kearney | NE | 308-234-9959 |
| MILCO Environmental Services, Inc. | Chris A. Miller | Kearney | NE | 308-237-5923 |
| 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 |
| 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 |
| Panhandle Geotechnical & Environmental, Inc. | David Weinert | Scottsbluff | NE | 308-632-6735 |
| Peterson Drilling, Inc. | Chris Peterson | Riverdale | NE | 308-893-4293 |
| Petrotek | Hal Demuth | Littleton | CO | 303-290-9414 |
| Philip Environmental Services | Beverly Roberts | Columbia | IL | 618-281-7173 |
| Pinnacle Engineering, Inc. | Steve Schleicher | Rochester | MN | 507-280-5966 |
| PSA Environmental | Roger R. Sense | Lee Summit | MO | 816-525-7483 |
| RDG Geoscience & Engineering, Inc. | Bob Kalinski | Omaha | NE | 402-894-2678 |
| RD Todd & Associates | Robert Todd | Eagle | NE | 402-781-2936 |
| RK & Associates, Inc. | Suresh Relwani | Warrenville | IL | 603-393-9000 |
| Roy F. Weston, Inc. | Ben Noller | Lakewood | CO | 303-980-6800 |
| Roy F. Weston, Inc. | Rodney Kirch | Vernon Hills | IL | 847-918-4149 |
| Safety-Kleen Consulting, Inc. | Mark Gallup | Boulder | CO | 303-938-5565 |
| SCS Engineers | David Brewer | Overland Park | KS | 913-451-7510 |
| Seneca Environmental Services, Inc. | Dustin Cruikshank | Omaha | NE | 402-431-0340 |
| Solstice Company, Inc. | Jay Baier | Huxley | IA | 515-291-4221 |
| Solstice Company, Inc. | Pete Mackenhaupt | Omaha | NE | 402-730-0367 |
| Stanley Environmental, Inc. | Mick Durham | Coralville | IA | 319-626-3990 |
| Sverdrup Civil, Inc. | Mike Hill | Overland Park | KS | 913-663-2101 |
| TCW Construction, Inc. | Christopher Boe | Lincoln | NE | 402-475-5030 |
| 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 |
| Tetra Tech, Inc. | Derek Dickinson | North Platte | NE | 308-534-5131 |
| Texas World Operations, Inc. | Brandy Robbins | Houston | TX | 713-365-9570 |
| Thiele Geotech, Inc. | Michael Gerdes | Omaha | NE | 402-556-2171 |
| Thompson, Dreessen & Dorner | Arthur D. Beccard | Omaha | NE | 402-330-8860 |
| Tri State Environmental Services, Inc. | Mark O'Harrow | Sioux City | IA | 712-276-2854 |
| URS Corporation | Christie Kampschneider | Omaha | NE | 402-334-8181 |
| URS Corporation | Wayne Smith | Overland Park | KS | 913-344-1000 |
| West Central Environmental Consultants, Inc. | Gaylen Weisenburger | Morris | MN | 320-589-2039 |