| Joyce Coffee Consulting LLC | Chicago | IL | $7.24M |
| North Wind Resource Consulting, LLC | Alexandria | VA | $7.23M |
| Asm Affiliates Inc. | Carlsbad | CA | $7.21M |
| Pinyon-sundance JV, LLC | Lakewood | CO | $7.13M |
| Ones Plexus Joint Venture LLC | Tulsa | OK | $7.13M |
| Apec Co. Ltd. | Seongnam | SEONGNAM-SI | $7.11M |
| Chugai Technos Corporation | Chuo-ku | | $7.11M |
| Asir LLC | Albuquerque | NM | $7.06M |
| Splut Inc. | Middletown | NY | $6.91M |
| Acs Habitat Management, Inc. | Oceanside | CA | $6.78M |
| Gv Henson Creek LLC | Bowie | MD | $6.69M |
| Hawaii International Environmental Services Inc. | Kawasaki | | $6.6M |
| Ceg-montrose 8a JV, LLC | Pottstown | PA | $6.6M |
| Western Properties | Rancho Cordova | CA | $6.59M |
| Precision Planning And Simulation, Inc. | Elizabeth City | NC | $6.4M |
| Whitetail Ayuda Joint Venture LLC | Jay | OK | $6.33M |
| Eco Analysts, LLC | Moscow | ID | $6.23M |
| Scout Environmental, Inc. | Encinitas | CA | $6.18M |
| Banda Group International LLC | Mesa | AZ | $6.09M |
| Bio-west Inc. | Logan | UT | $6.09M |
| Brooks Environmental Solutions LLC | Panama City Beach | FL | $5.9M |
| Advanced Environmental Management Group, LLC | Plymouth | MI | $5.9M |
| Ironwood Consulting Inc. | Redlands | CA | $5.76M |
| WSP Italia S.R.L. | Torino | TON | $5.75M |
| Tetra Tech, Inc. | Bothell | WA | $5.59M |
| Environmental Quality, Inc. | Jupiter | FL | $5.59M |
| Integrated Environmental Solutions LLC | Mckinney | TX | $5.5M |
| Woods Canyon Archaeological Consultants, Inc. | Cortez | CO | $5.49M |
| Csa Ocean Sciences Inc. | Stuart | FL | $5.45M |
| Rural And Tribal Environmental Solutions, Inc. | Wise River | MT | $5.43M |
| Sonoma Technology, Inc. | Petaluma | CA | $5.28M |
| Global Consulting Inc. | Greenbelt | MD | $5.27M |
| Hidden Water Inc. | Owasso | OK | $5.24M |
| The Catalyst Group Of Companies Limited Liability Company | New Brunswick | NJ | $5.22M |
| Alpha-erg, JV, LLC | San Antonio | TX | $5.19M |
| Lincoln Environmental Services, Inc. | Ogden | UT | $5.14M |
| Church Branch Mitigation, LLC | Bellaire | TX | $4.99M |
| Logan Simpson Design Inc. | Fort Collins | CO | $4.98M |
| Lampl/herbert Consultants, Inc. | Tallahassee | FL | $4.97M |
| Stillwater Ecosystem Watershed & Riverine Sciences | Berkeley | CA | $4.84M |
| North Wind Resource Partnership JV, LLC | Idaho Falls | ID | $4.82M |
| Ohio Valley Archaeology, Inc. | Columbus | OH | $4.78M |
| Golder Associates Inc. | Anchorage | AK | $4.74M |
| North Pacific Wildlife Consulting, LLC | Lake Forest Park | WA | $4.7M |
| Pinyon Environmental, Inc. | Lakewood | CO | $4.68M |
| Tetra Tech Inc. | Chantilly | VA | $4.61M |
| Avatar Environmental LLC | Malvern | PA | $4.51M |
| Brooks-esc JV LLC | Panama City Beach | FL | $4.5M |
| Ecosphere Environmental Services Inc. | Durango | CO | $4.48M |
| Koman Environmental Assessment Services, LLC | Anchorage | AK | $4.46M |
| Nutter & Associates Inc. | Athens | GA | $4.42M |
| Ecosystem Planning & Restoration LLC | Tomball | TX | $4.4M |
| Deltares USA Inc. | Silver Spring | MD | $4.32M |
| Sagebrush Advisors, LLC | Golden | CO | $4.17M |
| Centaur Consulting Group LLC | Clarksburg | MD | $4.15M |
| Rock Ferry Station, LLC | Harpers Ferry | WV | $4.14M |
| Essa Technologies Ltd. | Vancouver | BC | $4.09M |
| WSP USA Environment & Infrastructure Inc. | San Diego | CA | $4.03M |
| Environmental Science Associates | San Francisco | CA | $4.01M |
| Bioresource Consultants, Inc. | Ojai | CA | $4.01M |
| Allred Restoration, Inc. | Tremonton | UT | $3.96M |
| Erg-terracon JV, L.L.C. | Baltimore | MD | $3.83M |
| Sustainable Resources Group Intnl Inc. | Kailua | HI | $3.82M |
| Wichita Government Solutions, LLC | Houston | TX | $3.79M |
| Verina-pars JV | Bridgewater | NJ | $3.73M |
| Gsina-gryphon JV LLC | Flemington | NJ | $3.69M |
| Ecopoint Inc. | Rifle | CO | $3.67M |
| Earth Systems LLC | Jacksonville Beach | FL | $3.62M |
| Global, Inc. | Elkridge | MD | $3.58M |
| Geosystems Analysis, Inc. | Tucson | AZ | $3.39M |
| Iina Ba Inc. | Farmington | NM | $3.38M |
| Water & Air Research, Inc. | Gainesville | FL | $3.36M |
| Ones Wte JV | Tulsa | OK | $3.33M |
| Arcadis Consulting (uk) Limited | London | | $3.27M |
| Airquest Environmental, Inc. | Davie | FL | $3.27M |
| Gray & Pape Inc. | Cincinnati | OH | $3.19M |
| Zia Engineering & Environmental Consultants LLC | Las Cruces | NM | $3.11M |
| Agile Facilities Solutions, LLC | Silver Spring | MD | $3.11M |
| Applied Coastal Research Associates, Inc. | Mashpee | MA | $3.09M |
| Western Ecosystems Technology, Inc. | Cheyenne | WY | $3.06M |
| Rock & Associates | Arvada | CO | $3.02M |
| Mason, Bruce & Girard, Inc. | Portland | OR | $3M |
| Phe-baker JV, LLC | Rockville | MD | $2.98M |
| Tierra Consulting Group, LLC | Pompano Beach | FL | $2.92M |
| Tac Environmental LLC | Toledo | OH | $2.92M |
| Batta Environmental Associates Inc. | Newark | DE | $2.91M |
| Gle Associates, Inc. | Tampa | FL | $2.89M |
| Ivl, Institut Fur Vegetationskunde Und Landschaftsokologie H. Schott Und Partner Landschaftsokologen | Hemhofen | | $2.87M |
| Environmental Engineering & Measurement Services Inc. | Gainesville | FL | $2.86M |
| Marsh & Associates LLC | Tempe | AZ | $2.82M |
| Archaeological Consultants Of The Carolinas, Inc. | Clayton | NC | $2.81M |
| RMS Nicklaus JV, LLC | Ventura | CA | $2.77M |
| S.l. Ross Environmental Research Limited | Ottawa | ON | $2.75M |
| Earthology, LLC | West Palm Beach | FL | $2.68M |
| Coastal Environments, Inc. | Baton Rouge | LA | $2.65M |
| G R B Environmental Services, Inc. | New York | NY | $2.65M |
| Hovers Co.,ltd. | Minato-ku | | $2.64M |
| Normandeau Associates, Inc. | Bedford | NH | $2.63M |
| Natureserve | Arlington | VA | $2.61M |
| Kane Environmental, Inc. | Seattle | WA | $2.55M |
