| Kinnetic Environmental, Inc. | Aptos | CA | Subcontractor |
| Kleinman Michael T | Irvine | CA | $0 |
| Knight Piesold And Co. | Denver | CO | $0 |
| Kodiak Development Group, Inc. | Fountain | CO | Subcontractor |
| Krause Consulting LLC | Fort Benton | MT | $0 |
| KRW Environmental Consulting | San Antonio | TX | $0 |
| KS2 Ecological Field Services LLC | Anton | TX | $0 |
| K.u. Resources, Inc. | Duquesne | PA | $0 |
| Lan Associates, Inc. | Saint Augustine | FL | $0 |
| Lancaster Services Inc. | Farragut | TN | $0 |
| Landmark Environmental Inc. | Littleton | CO | Subcontractor |
| Lang Railsback & Associates | Arcata | CA | $0 |
| Larry Duty | Coldspring | TX | Subcontractor |
| LBMB Inc. | Longview | WA | $0 |
| Lead Safe, LLC | Syracuse | NY | $0 |
| Lebron Carmen | Camarillo | CA | Subcontractor |
| Legacy Cultural Resources LLC | Austin | TX | Subcontractor |
| Leland Family Enterprises LLC | North Andover | MA | $0 |
| Leucadia Exploration Inc. | Solana Beach | CA | Subcontractor |
| Lew Environmental Services, LLC | Mine Hill | NJ | Subcontractor |
| Lf Green Development, LLC | Sheboygan | WI | $0 |
| LGL Environmental Services, Inc. | Ellensburg | WA | $0 |
| LGL Limited | King City | ON | $0 |
| Lloyd Rebecca A | Bar Harbor | ME | $0 |
| Loflin Environmental Services, Inc. | Houston | TX | $0 |
| Lorax Partnerships LLC | Baltimore | MD | Subcontractor |
| Lower Arkansas Valley Water Conservancy District | Rocky Ford | CO | $0 |
| Low Impact Development (lid) Center, Inc. | Beltsville | MD | Subcontractor |
| Lsa Associates, Inc. | Irvine | CA | Subcontractor |
| Madeline Boehm | Sarasota | FL | $0 |
| Mad Scientist Associates LLC | Westerville | OH | $0 |
| Malia Bowman | Jacksonville | FL | $0 |
| Mamie Parker | Sterling | VA | $0 |
| Mannus Corporation | Dayton | OH | Subcontractor |
| Marine Research Consultants, Inc. | Kaneohe | HI | Subcontractor |
| Marine Sampling Systems LLC | Olympia | WA | Subcontractor |
| Marine Surveys & Assessments Cooperative | Port Townsend | WA | Subcontractor |
| Marshall Environmental Management Inc. | Oklahoma City | OK | $0 |
| Marty Ecological Consulting | Sacramento | CA | Subcontractor |
| Mass Technology Corp. | Plymouth Meeting | PA | Subcontractor |
| Maul Foster & Alongi, Inc. | Vancouver | WA | $0 |
| Mayhew Environmental Training Associates, Inc. | Lawrence | KS | $0 |
| M.b. Amster & Associates, Inc. | Concord | MA | $0 |
| MBC Aquatic Sciences | Costa Mesa | CA | $0 |
| Mccabe Environmental Services L.L.C | Lyndhurst | NJ | $0 |
| Mccurry Environmental Consulting, LLC | Johnson City | TN | Subcontractor |
| Mc Environmental Solutions, Inc. | Bakersfield | CA | Subcontractor |
| Mcgarigal, Kevin | Dolores | CO | $0 |
| Mcgehee Engineering Corp. | Jasper | AL | $0 |
| Mcgowan Well Water Compliance Management LLC | Ringwood | NJ | $0 |
| Mcgraw Jodi M | Corralitos | CA | $0 |
| Mclelland Jerry A | Hattiesburg | MS | Subcontractor |
| Med Solutions LLC | Cumming | GA | $0 |
| Metric Environmental LLC | Indianapolis | IN | Subcontractor |
| Michael Vepraskas | Raleigh | NC | $0 |
| Micro Air Of Texas Inc. | Dickinson | TX | Subcontractor |
| Microanalytics Inc. | Louisville | KY | $0 |
| Mid State Environmentals, LLC | Kingsland | GA | Subcontractor |
| Midwest Biodiversity Institute, Inc. | Hilliard | OH | Subcontractor |
| Minden & Associates LLC | Winthrop | WA | $0 |
| Minnesota Rural Water Association, Inc. | Elbow Lake | MN | Subcontractor |
| Mirage International Inc. | Oklahoma City | OK | $0 |
| Moldpro International, LLC | Kailua | HI | Subcontractor |
| Mountain Research LLC | Altoona | PA | $0 |
| Mountain Studies Institute Inc. | Durango | CO | $0 |
| Mrag Americas, Inc. | Saint Petersburg | FL | $0 |
| Muranaka Environmental Consultants Inc. | Honolulu | HI | $0 |
| Murray Geoconsulting, LLC | Lakewood | CO | $0 |
| Nagamia, Jamal | Temple Terrace | FL | $0 |
| National Registry Of Environmental Professionals | Chicago | IL | $0 |
| Nationwide Environmental Services, Inc. | Wheat Ridge | CO | $0 |
| Natural Capitalism Solutions Inc. | Longmont | CO | $0 |
| Nek Associates, Limited | Allston | MA | Subcontractor |
| New Air Services Corporation | Fort Wayne | IN | $0 |
| Newearth Ecological Consulting, LLC | The Villages | FL | $0 |
| New Jersey Water Association Inc. | Lanoka Harbor | NJ | Subcontractor |
| New North Consulting, LLC | Anchorage | AK | $0 |
| Newport News Nuclear Inc. | Newport News | VA | Subcontractor |
| New York Environmental & Analytical Laboratories, Inc. | Port Washington | NY | Subcontractor |
| Night Sky Metrics LLC | Woodland Hills | CA | $0 |
| North American Trading House LLC | Sleepy Hollow | NY | Subcontractor |
| Northeast States For Coordinated Air Use Management Inc. | Boston | MA | $0 |
| Northern Tilth LLC | Belfast | ME | $0 |
| Northgate Environmental Management, Inc. | Oakland | CA | Subcontractor |
| Northstar Environmental Testing LLC | Mosinee | WI | Subcontractor |
| Northwater LLC | Springfield | IL | Subcontractor |
| Northwest Ecological Services, L.L.C. | Bellingham | WA | $0 |
| Northwest Habitat Institute | Philomath | OR | $0 |
| North Wind Resource Consulting LLC | Tempe | AZ | $0 |
| Nr Systems, Inc. | River Heights | UT | $0 |
| NV5, Inc. | Albuquerque | NM | Subcontractor |
| Obrien & Company, LLC | Seattle | WA | Subcontractor |
| Occupational Training, Inc. | Kapolei | HI | $0 |
| Ocean Exploration Consulting, LLC | Portland | OR | Subcontractor |
| Oceania Safety And Environmental LLC | Tamuning | GU | Subcontractor |
| Oceans Of Grace Consulting LLC | Ventura | CA | Subcontractor |
| Oklahoma Association Of Conservation Districts Inc. | Weatherford | OK | $0 |
| Opaque Smoke School, LLC | Overland Park | KS | $0 |
| Oregon Department Of State Lands | Salem | OR | $0 |
| Oss Corp. | Hanson | MA | $0 |
