Name of Company | Contact | City | State | Phone |
| Agricultural Engineering Associates | John George | Uniontown | KS | 620-756-1000 |
| AIM Environmental Consulting | Harold Nagel | Kearney | NE | 308-234-1749 |
| Aquaterra Environmental Solutions, Inc. | Mike Miller | Omaha | NE | 402-884-6202 |
| Bartlett & West Engineers, Inc. | Galen S. Lay | St. Joseph | MO | 816-364-3551 |
| Burns & McDonnell | Jim Foil | Kansas City | MO | 816-822-3180 |
| Cascade Earth Sciences | Jonathan Paetz | Valley | NE | 402-359-6008 |
| Clayton Group Services, Inc. | Monte M. Nienkerk | Downers Grove | IL | 630-795-3200 |
| Coranco Great Plains, Inc. | Dan Blankenau | Wahoo | NE | 402-443-4340 |
| Enviro Service | Marty McCafferty | Scottsbluff | NE | 308-632-3933 |
| Environmental Management Resource, Inc. | John Rademacker | Lincoln | NE | 402-441-3022 |
| 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. | Mel Cerny | Lincoln | NE | 402-466-8154 |
| Hanson Professional Services, Inc. | Curt Krueger | Kansas City | MO | 816-701-3102 |
| Howard Green Company | Michael G. Fisher | Cedar Rapids | IA | |
| HWS Consulting Group, Inc. | Owen Goodenkauf | Lincoln | NE | 800-279-4972 |
| Institute for Environmental Assessment | David Kluge | Ralston | NE | 402-339-6240 |
| John Prouty Construction, Inc. | John Prouty | O'Neill | NE | 402-336-4014 |
| Lenz Environmental, Inc. | Brian Lenz | West Des Moines | IA | 515-221-3993 |
| Liesch Associates, Inc. | Ken Olson | Plymouth | MN | 612-559-1423 |
| Maxim Technologies | Mitch Kannenberg | Sioux Falls | SD | 605-332-5371 |
| Mid West Laboratories | Ken Pohlman | Omaha | NE | 402-334-7770 |
| 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 |
| 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 |
| PSA Environmental | Roger R. Sense | Lee Summit | MO | 816-525-7483 |
| Roy F. Weston, Inc. | Ben Noller | Lakewood | CO | 303-980-6800 |
| Servi-Tech Laboratories | Brian Shreve | Hastings | NE | 800-468-5411 |
| Servi-Tech Laboratory | Fred Vocasek | Dodge City | KS | 316-227-7509 |
| 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 |
| TestAmerica, Inc. | Mike McGee | Cedar Falls | IA | 800-750-2401 |
| Tetra Tech EM Inc. | Kathleen Homer | Lenexa | KS | 913-894-2600 |
| West Central Environmental Consultants, Inc. | Gaylen Weisenburger | Morris | MN | 320-589-2039 |