| Kenexis Consulting Corp. | Upper Arlington | OH | Subcontractor |
| Ker Train Research Inc. | Kingston | ON | Subcontractor |
| Ketchum Consulting Services, Limited Liability Company | Colbert | WA | $0 |
| Kevin A Ford Astronautical, LLC | League City | TX | Subcontractor |
| Kevin Carmichael Consulting LLC | Westlake | OH | Subcontractor |
| Keysoft Systems, Inc. | San Diego | CA | Subcontractor |
| Keystone Associates, LLC | Binghamton | NY | $0 |
| Keystone Engineering Inc. | Mandeville | LA | $0 |
| Keytech Analysis, Inc. | Keymar | MD | Subcontractor |
| Khafra Engineering Consultants Inc. | Atlanta | GA | $0 |
| Kh Engineering Group, P.a | Lenexa | KS | Subcontractor |
| KHLG & Associates, Inc. | Tamuning | GU | Subcontractor |
| Kibbe William A & Associates Inc. | Saginaw | MI | $0 |
| Kier & Wright Civil Engineers & Surveyors Inc. | Santa Clara | CA | $0 |
| Kiewit Engineering Group Inc. | Lenexa | KS | Subcontractor |
| Kilowatt Engineering, Inc. | Oakland | CA | Subcontractor |
| Kim Engineering Inc. | Laurel | MD | Subcontractor |
| Kimley-horn/michael Baker | Virginia Beach | VA | Subcontractor |
| Kinetic Analytics LLC | Fountain Valley | CA | $0 |
| Kinetic Art & Technology Corp. | Greenville | IN | Subcontractor |
| Kirkham, Michael & Associates, Inc.Ellsworth, KS · UEI HF1UMJ6MKK16 | Ellsworth | KS | $0 |
| Kirkham, Michael & Associates, Inc.Omaha, NE · UEI D4GNYLLYUNA8 | Omaha | NE | $0 |
| Kitty Hawk Technologies LLC | King George | VA | Subcontractor |
| Kleinfelder Inc.Fresno, CA · UEI SAAUBCKMLEK3 | Fresno | CA | Subcontractor |
| Kleinfelder Inc.Denver, CO · UEI ZN39JXM49BM5 | Denver | CO | $0 |
| Kleinfelder, Inc.Reno, NV · UEI R8QNMFXRMZQ3 | Reno | NV | $0 |
| Kleinfelder, Inc.Exton, PA · UEI CHLWFE6AJ3E7 | Exton | PA | $0 |
| Kleinfelder, Inc.Redmond, WA · UEI E6DEDD2NX638 | Redmond | WA | $0 |
| Kleinfelder, Inc.Hanover, MD · UEI EM97LJM9L227 | Hanover | MD | Subcontractor |
| Kleinfelder, Inc.Austin, TX · UEI G185ZWR9WMN8 | Austin | TX | $0 |
| Kleinfelder, Inc.Taylorsville, UT · UEI WPK1TR64JBV6 | Taylorsville | UT | Subcontractor |
| Kleinfelder Southeast, Inc. | Greensboro | NC | $0 |
| Klein, Lawrence A | Santa Ana | CA | $0 |
| KLG Jones LLC | Spartanburg | SC | Subcontractor |
| Klingner & Associates PC | Quincy | IL | Subcontractor |
| KLM Engineering Inc. | Saint Paul | MN | Subcontractor |
| KLS Government Services LLC | Morgantown | WV | Subcontractor |
| Km Engineering, LLP | Boise | ID | Subcontractor |
| Kmfne LLC | Barrigada | GU | Subcontractor |
| Knapp Engineering, Inc. | Prospect | CT | $0 |
| Knighthawk Engineering, Inc. | Houston | TX | $0 |
| Knowles William | Scottsdale | AZ | $0 |
| Koa Corporation | Monterey Park | CA | $0 |
| Koandah LLC | Alexandria | VA | Subcontractor |
| Kochab Calibrations LLC | Tucson | AZ | Subcontractor |
| Kocher Schirra Goharizi Consulting Engineers, Inc. | Glendale | CA | Subcontractor |
| Koehler Engineering And Land Surveying, Inc. | Cape Girardeau | MO | $0 |
| Koffel Associates, Inc. | Columbia | MD | Subcontractor |
| Koontz Bryant Johnson Williams Inc. | Richmond | VA | Subcontractor |
| Korda Nemeth Engineering, Inc. | Columbus | OH | Subcontractor |
| Kovacs, Whitney & Associates Inc. | Baltimore | MD | $0 |
| Kp Engineers & Associates, Inc. | Merritt Island | FL | Subcontractor |
| KPFF Inc. | Los Angeles | CA | Subcontractor |
| Kratos Defense & Security Solutions, Inc. | San Diego | CA | Subcontractor |
| Kratos Technology & Training Solutions, Inc. | Colorado Springs | CO | Subcontractor |
| Krazan & Associates | Clovis | CA | Subcontractor |
| Ksa Engineers, Inc. | Longview | TX | Subcontractor |
| Ks Associates, Inc. | Elyria | OH | $0 |
| Ks Engineers, P.C. | Newark | NJ | $0 |
| KSF Inc. | Honolulu | HI | Subcontractor |
| K T Industries, Inc. | Los Angeles | CA | $0 |
| Kumar And Associates, Inc. | Denver | CO | Subcontractor |
| Kupono Technologies, LLC | San Diego | CA | Subcontractor |
| Kurtek LLC | Centreville | VA | Subcontractor |
| Kustom Contracting Inc. | Hollywood | FL | $0 |
| Kwesst Inc. | Ottawa | ON | Subcontractor |
| Kx Simulation Technologies, Inc. | Blue Ash | OH | Subcontractor |
| Kyer Product Visions, Inc. | Foxboro | MA | Subcontractor |
| Kymberg Consulting LLC | Alexandria | VA | Subcontractor |
| L2M Properties LLC | Canfield | OH | Subcontractor |
| L3harris Nexgen Communications, LLC | Columbia | MD | Subcontractor |
| Labella Associates, D.P.C | Rochester | NY | Subcontractor |
| Lacoop Consulting LLC | Manchester | NH | Subcontractor |
| Lacy & Ebeling Engineering, Inc. | Great Falls | MT | $0 |
| L. A. Gates Company | Beckley | WV | $0 |
| Lakeside Engineers, LLC | Milwaukee | WI | Subcontractor |
| Lakhani & Jordan Engineers PC | New York | NY | $0 |
| Lally Consulting LLC | Seattle | WA | Subcontractor |
| Lamalo Technology Inc. | Calgary | AB | $0 |
| Lamereaux Consulting LLC | Jermyn | PA | $0 |
| Lamp Rynearson Inc. | Omaha | NE | Subcontractor |
| Lamson Engineering Corporation | West Newton | MA | $0 |
| Land Development Consultants, Inc. | Woodinville | WA | Subcontractor |
| Land Development Solutions LLC | Columbus | MT | $0 |
| Landmark Consultants, Inc. | El Centro | CA | Subcontractor |
| Landmark Facilities Group, Inc. | Norwalk | CT | $0 |
| Landmark Testing & Engineering, Inc. | Saint George | UT | $0 |
| Land Warfare Acoustic Systems, Inc. | West Palm Beach | FL | $0 |
| Lane Engineers, Inc. | Tulare | CA | Subcontractor |
| Lane Management Group Inc. | Zanesville | OH | Subcontractor |
| Lanier & Associates Consulting Engineers, Inc. | New Orleans | LA | $0 |
| Larson Design Group, Inc. | Cranberry Township | PA | Subcontractor |
| Larson Engineering, Inc. | Saint Paul | MN | Subcontractor |
| Lastoskie Thomas | Dayton | OH | $0 |
| Latimer Sommers & Associates P.a. | Topeka | KS | $0 |
| Latitude 33 - Planning And Engineering | San Diego | CA | Subcontractor |
| Lattice Technology Group Inc. | Limestone | ME | Subcontractor |
| Lavender Industries, Inc. | West Hills | CA | $0 |
| Lawrence T. Butler, Professional Engineer, LLC | Omaha | NE | Subcontractor |
| Lbyd Federal, LLC | Huntsville | AL | Subcontractor |
