Name of Company | Contact | City | State | Phone |
| APC Engineering | Alan Church | Platte | SD | 605-337-2641 |
| Aquaterra Environmental Solutions, Inc. | Mike Miller | Omaha | NE | 402-884-6202 |
| Baker & Associates | John Baker | Scottsbluff | NE | 308-632-3123 |
| Barker, Lemar & Associates, Inc. | Mike Barker | Des Moines | IA | 515-256-8814 |
| Burns & McDonnell | Jim Foil | Kansas City | MO | 816-822-3180 |
| CH2M Hill | Bob Sink | Omaha | NE | 402-341-1258 |
| Conestoga-Rovers & Associates | Neil Leipzig | Omaha | NE | 402-778-4804 |
| Eisenbraun & Associates | Todd Van Maanen | Yankton | SD | 605-665-8092 |
| Eneco Tech | John Lynch | Denver | CO | 303-861-2200 |
| Engineering Solutions & Design, Inc. | Jack Chappelle | Overland Park | KS | 800-298-1851 |
| 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 |
| Gershman, Brickner & Bratton, Inc. | Harvey Gershman | Fairfax | VA | 703-573-5800 |
| Golder Associates, Inc. | Dean Rector | Lakewood | CO | 800-235-7784 |
| Hanson Professional Services, Inc. | Curt Krueger | Kansas City | MO | 816-701-3102 |
| HDR Engineering | Tim Crockett | Omaha | NE | 402-399-1257 |
| 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 |
| Lashley Feedlot Development and Consulting | Bud Lashley | Curtis | NE | 308-367-4336 |
| Liesch Associates, Inc. | Ken Olson | Plymouth | MN | 612-559-1423 |
| MACTEC Engineering & Consulting, Inc. | Tom Colwell | Lincoln | NE | 402-421-7755 |
| Miller & Associates | Chris Miller | McCook | NE | 308-345-3700 |
| 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 |
| Professional Environmental Solutions | Vaden Hellerich | Valparaiso | NE | 402-817-3942 |
| R.W. Beck, Inc. | Neal D. Suess | Columbus | NE | 402-564-3251 |
| Ross & Associates Environmental Consulting, Ltd. | Gail Gatton | Seattle | WA | 206-447-1805 |
| SCS Engineers | David Brewer | Overland Park | KS | 913-451-7510 |
| Terracon | David M. Svingen | Omaha | NE | 402-330-2202 |
| WLA Consulting, Inc. | Brian Mulinix | Lincoln | NE | 402-475-8588 |
| WLA Consulting, Inc. | Fred Scarpello | Omaha | NE | 402-991-5833 |