| E.d.pons Associates, P.C. | Kingston | PA | Subcontractor |
| Eets, Inc. | Citrus Heights | CA | $0 |
| Efla Hf. | Reykjavik | | Subcontractor |
| Eghimes Consulting LLC | Pittsford | NY | $0 |
| Ehat Consulting LLC | Durango | CO | Subcontractor |
| Ehlert Bryan DC Professional Corp. | Washington | DC | Subcontractor |
| Ehlert-bryan Inc. | Vienna | VA | Subcontractor |
| Ehrhart Griffin & Associates, Inc. | Omaha | NE | Subcontractor |
| Eic Engineers, Inc. | Anchorage | AK | Subcontractor |
| Einforme Inc. | Bethesda | MD | Subcontractor |
| Einhorn Engineering PLLC | Seattle | WA | Subcontractor |
| E.i. Team, Inc. | Buffalo | NY | $0 |
| E. K. Fox & Associates, Limited | Chantilly | VA | Subcontractor |
| Ekonerg D.o.o. | Zagreb | | Subcontractor |
| Electrical Design Technology, Inc. | Granite Bay | CA | Subcontractor |
| Electrical Engineering Consulting & Testing, PC | Wendell | NC | Subcontractor |
| Electrical Installation & Service Corp. | Caguas | PR | $0 |
| Electric Power Engineers LLC | Austin | TX | Subcontractor |
| Electro Design Engineering Inc. | Riverview | FL | Subcontractor |
| Electron Beam Engineering, Inc. | Anaheim | CA | Subcontractor |
| Elen Consulting Inc. | San Diego | CA | Subcontractor |
| Elia Grid International | Bruxelles | | Subcontractor |
| Elite Computer Engineering Services LLC | Stafford | VA | Subcontractor |
| Elite Systems Control, Inc. | Grantsville | UT | Subcontractor |
| Elite Technologies LLC | Fort Wayne | IN | Subcontractor |
| Elo Consulting LLC | Rancho Palos Verdes | CA | Subcontractor |
| E. L. Robinson Engineering Co. | Charleston | WV | Subcontractor |
| E. L. Robinson Engineering Of Ohio Co. | Grandview Heights | OH | Subcontractor |
| Elysian Engineering Corporation | Frisco | TX | Subcontractor |
| Ema Engineering & Consulting Inc. | Tyler | TX | Subcontractor |
| Embedded Alchemy LLC | Milwaukee | WI | Subcontractor |
| Embedded Flight Systems, Inc. | Laurel | MD | Subcontractor |
| Ember Technologies Inc. | Athens | AL | Subcontractor |
| Embr | Cerritos | CA | Subcontractor |
| Emc Engineering Services, Inc. | Savannah | GA | Subcontractor |
| Eme Consulting Engineering And Architecture Group, LLC | New York | NY | $0 |
| Emf Enterprises Inc. | Janesville | WI | Subcontractor |
| Emf Industries LLC | Falls Church | VA | Subcontractor |
| Emrico Technologies LLC | Chantilly | VA | Subcontractor |
| Encompass Consultant Group Inc. | Camarillo | CA | Subcontractor |
| Endeavor Professional Services LLC | State College | PA | Subcontractor |
| E Nelson Engineering, LLC | Laramie | WY | Subcontractor |
| Enerconamerica, Inc. | Chicago | IL | $0 |
| Enercon Federal Services Inc. | Kennesaw | GA | Subcontractor |
| Enercon Services, Inc. | Kennesaw | GA | Subcontractor |
| Energy Engineering Associates, Inc. | Austin | TX | Subcontractor |
| Energy Environmental Corp. | Centennial | CO | $0 |
| Energy Idaho Operations Office, United States Dept Of | Idaho Falls | ID | Subcontractor |
| Enermax For Trading And General Contracting LLC | Mansour | | Subcontractor |
| Enertronics Engineering Corp. | Munster | IN | Subcontractor |
| Enex | Sofia | | Subcontractor |
| Enfa Corp. | Leesburg | VA | Subcontractor |
| Enfra Tme, LLC | Little Rock | AR | Subcontractor |
| Engenesys, LLC | Erlanger | KY | $0 |
| Engeo Incorporated | San Ramon | CA | Subcontractor |
| Engineered Designs PLLC | Cary | NC | Subcontractor |
| Engineering And Testing Consultants, Inc. | Virginia Beach | VA | $0 |
| Engineering And Testing Services, Inc. | Virginia Beach | VA | Subcontractor |
| Engineering Associates | Cody | WY | Subcontractor |
| Engineering Concepts Inc. | Daleville | VA | $0 |
| Engineering Consultants, Inc. P.a. | Boise | ID | Subcontractor |
| Engineering Dynamics Incorporated | San Antonio | TX | $0 |
| Engineering Economics, Inc. | Seattle | WA | Subcontractor |
| Engineering Inc. | Billings | MT | $0 |
| Engineering & Inspection Services, L.L.C. | Metairie | LA | $0 |
| Engineering Partners, Inc. | Tamuning | GU | Subcontractor |
| Engineering Plus Inc. | Meridian | MS | $0 |
| Engineering Side Projects LLC | Saint Clair Shores | MI | Subcontractor |
| Engineering Solutions LLC | Bozeman | MT | Subcontractor |
| Engineering Surveys And Services LLC | Columbia | MO | $0 |
| Engineers, U S Army Corps Of | Saint Louis | MO | $0 |
| England, Thims & Miller, Inc. | Jacksonville | FL | $0 |
| Enoise Control, Inc. | Noblesville | IN | $0 |
| Enola Technologies LLC | Alexandria | VA | Subcontractor |
| Enprotec / Hibbs & Todd, Inc. | Abilene | TX | Subcontractor |
| Enquisit Inc. | Gaithersburg | MD | Subcontractor |
| Enrique Ruiz & Associates, P.S.C | San Juan | PR | $0 |
| Ens Designs Inc. | Washington | NC | Subcontractor |
| Enser Corp. | Cinnaminson | NJ | $0 |
| Entech Engineering Inc.Reading, PA · UEI MKFZEC4RQTP9 | Reading | PA | Subcontractor |
| Entech Engineering Inc.Pacific, MO · UEI WYPJLCBMNH55 | Pacific | MO | Subcontractor |
| Entech Engineering PC | New York | NY | $0 |
| Entellus Inc. | Phoenix | AZ | $0 |
| Enterprise Consulting Group, LLC | Alexandria | VA | Subcontractor |
| Enterprise Engineering, Inc. | Falmouth | ME | Subcontractor |
| Envieta Systems LLC | Owings Mills | MD | Subcontractor |
| Environ-civil Engineering, Ltd. | Columbia | MD | $0 |
| Environmental Design Consultants Inc. | Pikeville | KY | $0 |
| Environmental Health Sciences-alaska Inc. | Eagle River | AK | Subcontractor |
| Environmental Resolutions Inc. | Mount Laurel | NJ | $0 |
| Envista Forensics, LLC | Atlanta | GA | Subcontractor |
| Epic Scientific LLC | Spring Lake | NJ | Subcontractor |
| Epona Engineering LLC | Greer | SC | Subcontractor |
| Eps Group Inc. | Mesa | AZ | Subcontractor |
| Equagen Engineers PC | Raleigh | NC | Subcontractor |
| Ers Engineering, Inc. | Jacksonville | FL | $0 |
| Esc Pacific Inc. | Honolulu | HI | Subcontractor |
| Esda LLC | Ashburn | VA | Subcontractor |
| Esgc Guam, LLC | Tamuning | GU | Subcontractor |
| E&s Grounding Solutions, Inc. | Laguna Niguel | CA | Subcontractor |
