Name of Company | Contact | City | State | Phone |
| AIM Environmental Consulting | Harold Nagel | Kearney | NE | 308-234-1749 |
| Air Resource Specialists, Inc. | Howard Gebhart | Fort Collins | CO | 970-484-7941 |
| American Engineering Testing, Inc. | Brad Palmer | Pierre | SD | 605-224-9535 |
| Aquaterra Environmental Solutions, Inc. | Mike Miller | Omaha | NE | 402-884-6202 |
| BE&K/Terranext | Steve Peck | Lakewood | CO | 303-914-1700 |
| BEM Systems, Inc. | Greg Butler | Kansas City | MO | 816-842-7440 |
| Burns & McDonnell | Jim Foil | Kansas City | MO | 816-822-3180 |
| Conestoga-Rovers & Associates | Neil Leipzig | Omaha | NE | 402-778-4804 |
| Ecology & Environmental, Inc. | John Caoile | Overland Park | KS | 913-432-9961 |
| Eneco Tech | John Lynch | Denver | CO | 303-861-2200 |
| Enviroplan Consulting | Sangeetha Balakrishnan | Fairfield | NJ | 973-575-2555 |
| Fox Engineering Associates | David Fox | Ames | IA | 515-233-0000 |
| Franklin Associates/McLaren/Hart, Inc. | David E. Brewer | Prairie Village | KS | 913-649-2225 |
| 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 |
| HWS Consulting Group, Inc. | Owen Goodenkauf | Lincoln | NE | 800-279-4972 |
| IT Corporation | Doug Trail | Urbandale | IA | 515-252-0234 |
| Liesch Associates, Inc. | Ken Olson | Plymouth | MN | 612-559-1423 |
| MACTEC Engineering & Consulting, Inc. | Tom Colwell | Lincoln | NE | 402-421-7755 |
| Maxim Technologies | Mitch Kannenberg | Sioux Falls | SD | 605-332-5371 |
| Nebraska Air Quality Specialties, LLC | Piyush Srivastav | Garland | NE | 402-310-5321 |
| Olsson Associates | Ryan Nelson | Grand Island | NE | 308-384-8570 |
| Olsson Associates | John Olsson | Lincoln | NE | 402-474-6311 |
| Olsson Associates | Lou Lamberty | Omaha | NE | 402-341-1116 |
| Pinnacle Engineering, Inc. | Steve Schleicher | Rochester | MN | 507-280-5966 |
| Professional Environmental Solutions | Vaden Hellerich | Valparaiso | NE | 402-817-3942 |
| Stanley Environmental, Inc. | Mick Durham | Coralville | IA | 319-626-3990 |
| Steigers Corporation | Tom Gibbons | Littleton | CO | 303-799-3633 |
| Sverdrup Civil, Inc. | Mike Hill | Overland Park | KS | 913-663-2101 |
| Terracon | David Svingen | Omaha | NE | 402-330-2202 |
| Tetra Tech, Inc. | Derek Dickinson | North Platte | NE | 308-534-5131 |
| Trinity Consultants | Don Gansert | Olathe | KS | 913-390-9700 |
| URS Corporation | Christie Kampschneider | Omaha | NE | 402-334-8181 |
| Whitmore Associates | Charles Whitmore | Shawnee Mission | KS | 913-262-8784 |
| WLA Consulting, Inc. | Brian Mulinix | Lincoln | NE | 402-475-8588 |
| WLA Consulting, Inc. | Fred Scarpello | Omaha | NE | 402-991-5833 |