| Cook Inlet Rcac Inc. | Kenai | AK | $0 |
| Copeland Robert L | Washington | DC | $0 |
| Coppersmith Consulting, Inc. | Walnut Creek | CA | $0 |
| Core Associates, LLC | West Hartford | CT | $0 |
| Corporacion De Centros Regionales De Servicios | Medellin | | Subcontractor |
| Corvus Consulting, LLC | Hollywood | MD | Subcontractor |
| Cotton Aviation Enterprises, Inc. | Lakeway | TX | Subcontractor |
| Creekside Center For Earth Observation LLC | Menlo Park | CA | $0 |
| Crimson Vista, Inc. | Austin | TX | $0 |
| Cs Consulting LLC | Casper | WY | Subcontractor |
| Csrgroup LLC | Crownsville | MD | $0 |
| Cten Global Strategies, LLC | Alpharetta | GA | $0 |
| CTR&S Inc. | Abingdon | VA | $0 |
| Ct Watch Inc. | Carson City | NV | $0 |
| Curran-bauer Analytics, LLC | Durham | NC | $0 |
| Cybercom Systems, Inc. | Roswell | GA | $0 |
| Cyber Pack Ventures, Inc. | Ellicott City | MD | Subcontractor |
| D2000 Safety, Inc. | Eugene | OR | $0 |
| Danell Consulting, Inc. | Winterville | NC | Subcontractor |
| Dan Velando Associates LLC | Mount Vernon | WA | $0 |
| Data Kinetix LLC | Lebanon | OH | Subcontractor |
| David Barnes, LLC | South Dennis | MA | Subcontractor |
| David Drake Consulting LLC | Bellbrook | OH | Subcontractor |
| David John Barrett | Malvern | PA | Subcontractor |
| David Kofranek Botany, LLC | Eugene | OR | $0 |
| David P. Maunder Consulting Services, Inc. | Reston | VA | Subcontractor |
| David R. Arday, Md, MPH, LLC | Laurel | MD | Subcontractor |
| David S Goldhammer | Lawrence | KS | $0 |
| Davis Mary C | Louisville | TN | $0 |
| Dawson Compliance LLC | Laguna Niguel | CA | $0 |
| DBA Consultancy Services Inc. | Brambleton | VA | Subcontractor |
| DBD, Inc. | Richland | WA | Subcontractor |
| DBS Productions LLC | Charlottesville | VA | $0 |
| Deerwood Technologies Inc. | Deerwood | MN | $0 |
| Defense Technology Engineering Consultants, Inc. | Rockville | MD | Subcontractor |
| Dell Energetix Consulting, LLC | Washington | DC | Subcontractor |
| Detector Dogs International, Inc. | Wahoo | NE | $0 |
| Diakronos Solutions Inc. | Cambridge | MA | Subcontractor |
| Dibritom Corporation | Solana Beach | CA | Subcontractor |
| Digital Design Solutions Inc. | Asbury Park | NJ | Subcontractor |
| Dioltas LLC | Carmel | IN | Subcontractor |
| Distinctive Afws Designs, Inc. | Leicester | NC | $0 |
| D. Kent Consulting Group, LLC | Bowie | MD | Subcontractor |
| DNV Energy Services USA Inc. | Houston | TX | $0 |
| Dolphin & Eagle Consulting, Inc. | Charleston | SC | $0 |
| Donahue Michael L | Potomac | MD | $0 |
| Donald K Ingram | Baton Rouge | LA | $0 |
| Dragon Consulting LLC | Bruceton Mills | WV | Subcontractor |
| Drew Collaborative Works LLC | Port Ludlow | WA | Subcontractor |
| Dr. Hazmat, Inc. | Longmont | CO | $0 |
| D & R International, Ltd. | Mc Lean | VA | Subcontractor |
| Drmtengineering LLC | Centennial | CO | Subcontractor |
| DSS+ Transportation LLC | Baltimore | MD | Subcontractor |
| Durango Skies, LLC | Durango | CO | $0 |
| Dust - Solve LLC | Henderson | NV | $0 |
| Dycon Government Solutions Inc. | Hagerstown | MD | $0 |
| E3 International LLC | Bethesda | MD | Subcontractor |
| Eagle Aerie Inc. | Seaford | DE | Subcontractor |
| Early To Late Stage Solutions LLC | Chapel Hill | NC | Subcontractor |
| Eastern Sierra Land Trust | Bishop | CA | $0 |
| Ebp US Inc. | Boston | MA | Subcontractor |
| Echelon Solutions LLC | Fredericksburg | VA | Subcontractor |
| Ecological Carbon Offset Partners, LLC | Minneapolis | MN | Subcontractor |
| Economic Consulting Associates Limited | London | | Subcontractor |
| Eco-resource Consulting, Incorporated | Stoughton | WI | $0 |
| Egs Consulting, Inc. | Santa Rosa | CA | $0 |
| E-hazard Management LLC | Louisville | KY | $0 |
| Eigen LLC | Merrimack | NH | Subcontractor |
| Electrain LLC | Pasco | WA | Subcontractor |
| Electrical Utility Disaster Specialists, Inc. | Glasgow | KY | Subcontractor |
| Electrolab Limited | Belleville | ON | $0 |
| Electronic Systems Group LLC | Gambrills | MD | Subcontractor |
| Ellsworth, LLC | Bowie | MD | Subcontractor |
| Emerging Security Incorporated | Leesburg | VA | Subcontractor |
| Emery & Associates Inc. | Vernon Hills | IL | $0 |
| Emily N Davis | Martinsburg | WV | $0 |
| Encon Services International LLC | Bethesda | MD | Subcontractor |
| Enegis, LLC | Fairfax | VA | Subcontractor |
| Enel X Advisory Services USA, LLC | Andover | MA | $0 |
| Enel X North America, Inc. | Andover | MA | $0 |
| Enercast GMBH | Kassel | | Subcontractor |
| Eneregan LLC | Mount Juliet | TN | $0 |
| Energeia USA | Davis | CA | Subcontractor |
| Energetski Institut Hrvoje Pozar | Zagreb | | Subcontractor |
| Energy Conservation Partners LLC | Hawthorn Woods | IL | $0 |
| Energy/matter Conversion Corporation | La Jolla | CA | $0 |
| Energy West Controls, LLC | Salt Lake City | UT | Subcontractor |
| Englandecology, LLC | Los Angeles | CA | $0 |
| Enterprise Integration Corporation | Alexandria | VA | Subcontractor |
| Enterprise Risk Management Inc. | Coral Gables | FL | $0 |
| Enviro-tech International | Montrose | CO | $0 |
| Erbschloe Technical Consulting, LLC | Sheridan | WY | Subcontractor |
| Ergonomic Technologies Corp. | Massapequa | NY | $0 |
| Ergosmith Consulting, LLC | Raleigh | NC | $0 |
| Esko Ukraina, Tov | Kyiv | | Subcontractor |
| E Source Companies LLC | Boulder | CO | $0 |
| Espcom LLC | Lawrence | KS | $0 |
| Estimations, Inc. | Anchorage | AK | Subcontractor |
| Evan Ya-wen Yu | Mercer Island | WA | $0 |
| Everwatt Lights, LLC | Hayward | CA | $0 |
