| Bath Group, LLC | El Paso | TX | Subcontractor |
| Bavault LLC | Leonardtown | MD | Subcontractor |
| Baxter & Woodman, Inc. | Crystal Lake | IL | $0 |
| Bay Engineering Inc. | Sturgeon Bay | WI | Subcontractor |
| Bay Engineering Innovations, Inc. | Edgewater | MD | Subcontractor |
| Bay Enterprises, Inc. | West River | MD | Subcontractor |
| Bay Rivers Consulting LLC | Yorktown | VA | Subcontractor |
| B & B Consultants Inc. | South Hill | VA | $0 |
| BBFM Engineers, Inc. | Anchorage | AK | Subcontractor |
| Bbix LLC | San Antonio | TX | Subcontractor |
| Bbix, LLC | Kingston | PA | $0 |
| Bc Architects Engineers, P.L.C. | Falls Church | VA | Subcontractor |
| Bcer Engineering, Inc. | Lakewood | CO | $0 |
| BCG Engineering & Consulting, Inc. | Metairie | LA | $0 |
| Bciq Engineering, LLC | Prosper | TX | Subcontractor |
| Beast Engineering, L.L.C. | Benton | LA | Subcontractor |
| Beaty Engineering LLC | Beaverton | OR | Subcontractor |
| Becher-hoppe Associates, Inc. | Wausau | WI | $0 |
| Becht Engineering Bt, Inc. | Warren | NJ | $0 |
| Becht Engineering Co. Inc. | Liberty Corner | NJ | $0 |
| Becht Engineering PC | Woodstock | MD | $0 |
| Beci-florida, LLC | Santa Rosa Beach | FL | Subcontractor |
| Bec Industries, LLC | Tallahassee | FL | $0 |
| Beckel Engineering LLC | Jupiter | FL | Subcontractor |
| Behar-ybarra And Associates LLC | San Juan | PR | Subcontractor |
| Belcan Engineering Group, LLCWest Palm Beach, FL · UEI MLHHGQPLP328 | West Palm Beach | FL | Subcontractor |
| Belcan Engineering Group, LLCBlue Ash, OH · UEI ZWLCEJLQ4YS5 | Blue Ash | OH | Subcontractor |
| Bentley Global Resources, LLC | Tarpon Springs | FL | Subcontractor |
| Berberian & Company, LLC | Bethesda | MD | Subcontractor |
| Berger Hill Joint Venture | New York | NY | $0 |
| Bertech Shielding Specialties LLC | White Rock | NM | Subcontractor |
| Best Engineering, PLC | Roanoke | VA | Subcontractor |
| Beta Group, Inc. | Lincoln | RI | Subcontractor |
| Beyond Engineering & Testing, LLC | Round Rock | TX | Subcontractor |
| Beyond Tomorrow Innovations, LLC | Boerne | TX | $0 |
| Bfa Systems Inc. | Huntsville | AL | Subcontractor |
| Bg Consultants, Inc. | Manhattan | KS | $0 |
| BHC Consultants, LLC | Seattle | WA | Subcontractor |
| BHC, Inc. | Overland Park | KS | Subcontractor |
| BHP Engineering & Construction, L.P. | Corpus Christi | TX | $0 |
| Big Head Endian LLC | Burden | KS | Subcontractor |
| Big Sky Acoustics, LLC | Helena | MT | $0 |
| Big Texas Sky, Inc. | Georgetown | TX | Subcontractor |
| Bilfinger Engineering Poland Spolka Z Ograniczona Odpowiedzialnoscia | Warszawa | | Subcontractor |
| Bilfinger Hungary Korlatolt Felelossegu Tarsasag | Budapest | | Subcontractor |
| Biokinetics & Associates Ltd. | Ottawa | ON | $0 |
| Biren Patel Engineering Nc LLC | Macon | GA | Subcontractor |
| Birmingham Engineering & Construction Consultants, Inc. | Birmingham | AL | Subcontractor |
| Bizbees Warriors Inc. | Cora | WY | Subcontractor |
| BKF Engineers | Oakland | CA | Subcontractor |
| BKL, Inc. | Tulsa | OK | $0 |
| Black Knight Technology Inc. | Fredericksburg | VA | Subcontractor |
| Black & Veatch Corporation | Overland Park | KS | Subcontractor |
| Black & Veatch International Company | Leawood | KS | $0 |
| Black Water Consulting Engineers, Inc. | Modesto | CA | Subcontractor |
| Blattner Technologies Federal, LLC | Nashville | TN | $0 |
| Bl Companies, Inc. | Meriden | CT | Subcontractor |
| Bloom Companies LLC | Milwaukee | WI | $0 |
| Bloom Consulting, LLC | Lorton | VA | Subcontractor |
| BLS, Consultants, Inc. | Va Beach | VA | Subcontractor |
| Blue Cranium LLC | Rocky River | OH | Subcontractor |
| Bluejacket Communications LLC | Suffolk | VA | Subcontractor |
| Blue Nautics, LLC | Costa Mesa | CA | Subcontractor |
| Blue Ocean Civil Consulting | Oceanside | CA | Subcontractor |
| Blueshore Engineering LLC | Teaneck | NJ | Subcontractor |
| Blue Skies Consulting, Inc. | Clifton | VA | Subcontractor |
| Blue Solutions LLC | Centreville | VA | $0 |
| Bluesteel Cybersecurity, LLC | Glenwood | MD | Subcontractor |
| Bluewater Solutions Group, Inc. | Lawrence | KS | Subcontractor |
| Bluewing Civil Consulting LLC | Lafayette | LA | $0 |
| BLV Engineering Associates Inc. | Cockeysville | MD | $0 |
| Bme Systems Inc. | Baltimore | MD | $0 |
| BMT Canada Ltd. | Kanata | ON | $0 |
| Boarhog, LLC | San Diego | CA | Subcontractor |
| Bob D Campbell & Co. | Kansas City | MO | Subcontractor |
| Bocook Engineering, Inc. | Paintsville | KY | $0 |
| Boeing Defence Australia Ltd. | Brisbane City | QLD | Subcontractor |
| Boiler Inspection Services Co. | Lisle | IL | $0 |
| Boksa Marine Design, Inc. | Lithia | FL | $0 |
| Bollig, Inc. | Willmar | MN | Subcontractor |
| Bolster Engineering LLC | Saint George | UT | Subcontractor |
| Boma Solutions LLC | Tucson | AZ | Subcontractor |
| Bond Consulting Engineers, Inc. | Jacksonville | AR | Subcontractor |
| Booth Network Consulting Services, Inc. | Dallas | TX | Subcontractor |
| Boswell, Inc. | South Hackensack | NJ | $0 |
| Boulanger, Ross | Davis | CA | $0 |
| Boutin Aviation Consulting, LLC | Leonardtown | MD | Subcontractor |
| Bow Engineering & Development, Inc. | Honolulu | HI | Subcontractor |
| Boyette Enterprises LLC | Chelsea | AL | $0 |
| Boyle Enterprises, Inc. | Torrance | CA | Subcontractor |
| Bradford Consulting Engineers, Inc. | Tualatin | OR | Subcontractor |
| Branchpattern Inc.Denver, CO · UEI CWFKNXPMCL55 | Denver | CO | $0 |
| Branchpattern Inc.Dallas, TX · UEI SKENJ2FSL758 | Dallas | TX | Subcontractor |
| Brayman Technical Services LLC | Alexandria | VA | Subcontractor |
| Breen Design Group Inc. | Torrance | CA | Subcontractor |
| Brenic, LLC | Woodbridge | VA | Subcontractor |
| Brett LLC | Bristow | VA | Subcontractor |
| Brewer Design Labs, Inc. | Francis | UT | Subcontractor |
| Bridgers & Paxton Consulting Engineers Inc. | Albuquerque | NM | Subcontractor |
| Bridge View Resources, LLC | Vacaville | CA | Subcontractor |
