| Aske Software, LLC | Tullahoma | TN | Subcontractor |
| Asplundh Engineering Services, LLC | Horsham | PA | Subcontractor |
| A Squared Plus Engineering Support Group, LLC | Westminster | MD | Subcontractor |
| Asset Integrity & Solutions LLC | Washington | PA | $0 |
| Associated Earth Sciences Inc. | Kirkland | WA | Subcontractor |
| Asteri Systems Inc. | New Market | AL | Subcontractor |
| Astrios LLC | Colorado Springs | CO | Subcontractor |
| Astroblank Scientific LLC | Ventura | CA | $0 |
| Astro Environmental Services Inc. | Fritz Creek | AK | Subcontractor |
| Asymmetric Engagement Solution LLC | Huntsville | AL | Subcontractor |
| Asystek Solutions Group LLC | Bethlehem | PA | Subcontractor |
| Ata Engineering Inc. | Lakewood | CO | Subcontractor |
| Athena Consulting Group, LLC | North Charleston | SC | Subcontractor |
| Athena Technology Group Inc. | Quantico | VA | Subcontractor |
| Ati International | El Cajon | CA | Subcontractor |
| Atkins Engineering Associates Inc. | Roswell | NM | Subcontractor |
| Atlanta Drive Systems Inc. | Wall Township | NJ | Subcontractor |
| Atlantic Engineering Inc. | Malvern | PA | Subcontractor |
| Atlantic Engineering Services Of Jacksonville Inc. | Jacksonville | FL | Subcontractor |
| Atlas Atc Engineering Inc. | Lafayette | LA | Subcontractor |
| Atlas Consultants LLC | Mc Lean | VA | Subcontractor |
| Atlas Consulting Services Inc. | Gainesville | VA | Subcontractor |
| Atmo-seal, Inc. | Troy | MI | $0 |
| Atoms Services LLC | Kennewick | WA | Subcontractor |
| Atria Technologies, LLC | Winter Park | FL | Subcontractor |
| Atse, LLC | Northborough | MA | Subcontractor |
| Atta Bro Consulting LLC | Bloomfield | IN | Subcontractor |
| Attollo LLC | New Bern | NC | Subcontractor |
| Atwell LLC | Southfield | MI | Subcontractor |
| Aucoin & Associates Inc. | Eunice | LA | $0 |
| Aultec, Inc. | Gaithersburg | MD | $0 |
| Aurora Marine Design | San Diego | CA | Subcontractor |
| Aurum Sierra Aerospace LLC | Fullerton | CA | Subcontractor |
| Auspex Technologies, LLC | Haymarket | VA | $0 |
| Austin, Tsutsumi & Associates, Inc. | Honolulu | HI | Subcontractor |
| Austral Consultoria Lda | Maputo | | Subcontractor |
| Auth Consulting & Associates, Inc. | Menomonie | WI | $0 |
| Automated Construction Technology Inc. | Oakwood | OH | Subcontractor |
| Automated Motion, Inc. | Lees Summit | MO | $0 |
| Autonautix, LLC | Phoenix | AZ | $0 |
| Auto Research Center LLC | Indianapolis | IN | Subcontractor |
| Auxilium International LLC | Fort Mill | SC | Subcontractor |
| Avacal LLC | Harvest | AL | Subcontractor |
| Avantech Strategies Corporation | Hume | VA | Subcontractor |
| Ava Technologies Global Corp. | Southern Pines | NC | Subcontractor |
| Av Helpdesk Inc. | Austin | TX | Subcontractor |
| Aviation Systems Engineering Company, Incorporated | Jacksonville | FL | Subcontractor |
| Aviation Technology Associates LLC | Fort Mill | SC | Subcontractor |
| Avid Systems, Inc. | Sneads Ferry | NC | Subcontractor |
| Avion Engineering Services Corp. | North Bend | WA | Subcontractor |
| Avionics Integration LLC | Marthasville | MO | Subcontractor |
| Avi PC | Cheyenne | WY | $0 |
| Avspec Corporation | Lincoln | CA | $0 |
| Avs US Inc. | Lansing | NY | Subcontractor |
| Avtek Inc. | Moorestown | NJ | Subcontractor |
| Avt, Incorporated | Bridgeville | PA | $0 |
| Awk Consulting Engineers, Inc. | Turtle Creek | PA | Subcontractor |
| Awl Enterprises, LLC | Annapolis | MD | $0 |
| Aws Technologies Inc. | Carlsbad | CA | $0 |
| Axiom PLLC | Boise | ID | Subcontractor |
| Axis Information Systems, Inc. | Severna Park | MD | Subcontractor |
| Ayres Associates Inc. | Eau Claire | WI | Subcontractor |
| Azar Design Co. Architecture, Landscape Architecture, Engineering And Surveying, P.C. | Buffalo | NY | $0 |
| Azimuth Consulting Services, Inc. | Fairfax | VA | $0 |
| Azimuth Technical Consultants, Inc. | Sugarloaf Key | FL | Subcontractor |
| B2P, Inc. | Colorado Springs | CO | Subcontractor |
| B3globalcon Bulgaria Eood | Sliven | | $0 |
| Badger State Consulting LLC | Schofield | WI | Subcontractor |
| Baer Engineering & Environmental Consulting, Inc. | Austin | TX | Subcontractor |
| BAE Systems Information And Electronic Systems Integration Inc. | Reston | VA | Subcontractor |
| BAE Systems Technology Solutions & Services Inc. | Mojave | CA | Subcontractor |
| Bagwell Engineering, Inc. | Pensacola | FL | Subcontractor |
| Bain Medina Bain Inc. | San Antonio | TX | Subcontractor |
| Bait Al Jame'e Gen.trad & Cont. Co/sa'ad Ahmad Yazie Yasin & Partner | Al Eqaila | | Subcontractor |
| Balance Hydrologics, Inc. | Berkeley | CA | Subcontractor |
| Balboa Engineering Inc. | San Diego | CA | Subcontractor |
| Baldridge & Associates Structural Engineering, Inc. | Honolulu | HI | Subcontractor |
| Bandwidth Solutions, Inc. | Mc Lean | VA | Subcontractor |
| Banner Associates, Inc. | Brookings | SD | $0 |
| Bardwell Electronics | Vineyard Haven | MA | $0 |
| Barge Design Solutions Inc.Chattanooga, TN · UEI D23RBN7G73S1 | Chattanooga | TN | $0 |
| Barge Design Solutions Inc.Dothan, AL · UEI Q1JULYQL1QF5 | Dothan | AL | $0 |
| Barge Design Solutions, Inc.Kingsport, TN · UEI DJQTUQ9H7LR3 | Kingsport | TN | Subcontractor |
| Barge Design Solutions, Inc.Atlanta, GA · UEI NF4LQ9N24R46 | Atlanta | GA | Subcontractor |
| Barge Design Solutions, Inc.Knoxville, TN · UEI P9YNN4U2PKL4 | Knoxville | TN | Subcontractor |
| Barge Design Solutions, Inc.Nashville, TN · UEI LH3BHY4L4CH1 | Nashville | TN | Subcontractor |
| Barge Design Solutions, Inc.Miamisburg, OH · UEI WL1ESSZQNT65 | Miamisburg | OH | Subcontractor |
| Barkley Consulting Engineers, Inc. | Tallahassee | FL | $0 |
| Barnaby Anderson | Wells | ME | Subcontractor |
| Barnett Quality Control Services, Inc. | San Diego | CA | Subcontractor |
| Barone Intelligence & Defense, LLC | Chantilly | VA | Subcontractor |
| Barrett Hale & Alamo , LLC | San Juan | PR | Subcontractor |
| Bartlett & West, Inc. | Topeka | KS | $0 |
| Barton Associates, Inc. | York | PA | $0 |
| Barton & Loguidice, D.P.C. | Liverpool | NY | $0 |
| Bartoszek Engineering | Aurora | IL | Subcontractor |
| Base2 LLC | Annapolis Junction | MD | Subcontractor |
| Baselines Inc. | Gainesville | VA | Subcontractor |
| Basic Commerce & Industries Inc. | King George | VA | Subcontractor |
| Baslee Engineering Solutions Bes, Inc. | Tampa | FL | $0 |
