Name of Company | Contact | City | State | Phone |
| APC Engineering | Alan Church | Platte | SD | 605-337-2641 |
| AquAeTer, Inc. | Steve Wampler | Englewood | CO | 303-771-9150 |
| Aquaterra Environmental Solutions, Inc. | Mike Miller | Omaha | NE | 402-884-6202 |
| Barker, Lemar & Associates, Inc. | Mike Barker | Des Moines | IA | 515-256-8814 |
| BE&K/Terranext | Steve Peck | Lakewood | CO | 303-914-1700 |
| Bolton & Menk, Inc. | Bill McAllister | Liberty | MO | 816-792-5100 |
| Burns & McDonnell | Jim Foil | Kansas City | MO | 816-822-3180 |
| Cascade Earth Sciences | Jonathan Paetz | Valley | NE | 402-359-6008 |
| CH2M Hill | Bob Sink | Omaha | NE | 402-341-1258 |
| Clayton Group Services, Inc. | Monte M. Nienkerk | Downers Grove | IL | 630-795-3200 |
| Conestoga-Rovers & Associates | Neil Leipzig | Omaha | NE | 402-778-4804 |
| EA Engineering, Science & Technology | H. Lee Becker | Lincoln | NE | 402-476-3766 |
| Ecology & Environmental, Inc. | John Caoile | Overland Park | KS | 913-432-9961 |
| Eneco Tech | John Lynch | Denver | CO | 303-861-2200 |
| Environmental Professionals, Inc. | Paul Ziemba | Omaha | NE | 402-891-1112 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Pinnacle Engineering, Inc. | Steve Schleicher | Rochester | MN | 507-280-5966 |
| Professional Environmental Solutions | Vaden Hellerich | Valparaiso | NE | 402-817-3942 |
| Protein Plus, L.P. | Jim Olsen | St. Paul | NE | 308-754-4100 |
| 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 |
| Stanley Environmental, Inc. | Mick Durham | Coralville | IA | 319-626-3990 |
| Sverdrup Civil, Inc. | Mike Hill | Overland Park | KS | 913-663-2101 |
| T.C. Engineering Inc. | Tom Werblow | North Platte | NE | 308-534-9245 |
| 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 |
| Thompson, Dreessen & Dorner | Arthur D. Beccard | Omaha | NE | 402-330-8860 |
| 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 |
| WLA Consulting, Inc. | Brian Mulinix | Lincoln | NE | 402-475-8588 |
| WLA Consulting, Inc. | Fred Scarpello | Omaha | NE | 402-991-5833 |