| Ies Lean Systems Ltd. | Nottingham | | $0 |
| Ig Bauplan GMBH | Kaiserslautern | | Subcontractor |
| Iges Ingenieros LLC | Bluffdale | UT | $0 |
| Igniition Technologies, LLC | Sudbury | MA | Subcontractor |
| Ij Research Inc. | Santa Ana | CA | Subcontractor |
| Ikona, Inc. | Westwood | MA | Subcontractor |
| Image And Video Exploitation Technologies, Limited Liability Co. | Tijeras | NM | $0 |
| Imc Consulting Engineers, Inc. | Metairie | LA | $0 |
| Implemetrics Incorporated | Houston | TX | Subcontractor |
| Inberg Surveying Company, Inc. | Riverton | WY | $0 |
| Incandescence Life Safety, Inc. | Denver | CO | Subcontractor |
| Industrial Control Concepts Inc. | Saint Louis | MO | Subcontractor |
| Industrial Electrical Services, Inc. | Montgomery | AL | Subcontractor |
| Industrial Vibration Consultants, Inc. | Lebanon | OH | $0 |
| Infinite Horizon Co. | Arvada | CO | Subcontractor |
| Information & Energy Services, Inc. | Escondido | CA | Subcontractor |
| Information System Technologies Inc. | Fort Collins | CO | $0 |
| Information Technology Engineering, LLC | Greenwood Village | CO | Subcontractor |
| Info Soft Systems, Inc. | Potomac | MD | Subcontractor |
| Infotechsvp, LLC | San Diego | CA | Subcontractor |
| Infotran Engineers & Architects PC | East Orange | NJ | Subcontractor |
| Infrastructure Consulting & Engineering, LLC | West Columbia | SC | Subcontractor |
| Infrastructure LLC | Omaha | NE | $0 |
| Infratech Engineers & Innovators LLC | Houston | TX | Subcontractor |
| Infratek Solutions, Inc. | New Hope | PA | Subcontractor |
| Infraterra, Inc. | San Francisco | CA | Subcontractor |
| Ingeniar Engineering Solutions PSC | Orocovis | PR | Subcontractor |
| Ingenium Professional Services, Inc. | Knoxville | TN | Subcontractor |
| Ingenuity Research Corporation | Colorado Springs | CO | Subcontractor |
| Innovative Design Inc. | Knoxville | TN | $0 |
| Innovative Engineering, Inc. | Woodstock | GA | $0 |
| Innovative Engineering Solutions, Inc. | Murrieta | CA | Subcontractor |
| Innovative Intuitive Technology, Inc. | Placentia | CA | Subcontractor |
| Innovative Space Technologies LLC | Merritt Island | FL | $0 |
| Innovative Werks Inc. | Naperville | IL | Subcontractor |
| Inovoal Corp. | Spring | TX | Subcontractor |
| Inpursuit LLC | Boyce | VA | Subcontractor |
| Inqu, LLC | Bellville | TX | Subcontractor |
| Insite Engineering, Surveying & Landscape Architecture, P.C. | Carmel | NY | Subcontractor |
| Inspec Inc. | Wayzata | MN | $0 |
| Institute For Information Industry | Taipei City | | Subcontractor |
| Instrumental Sciences Inc. | Huntsville | AL | Subcontractor |
| Integral Research Solutions Group Inc. | Minneapolis | MN | Subcontractor |
| Integral Research Solutions Group, Inc. | San Francisco | CA | Subcontractor |
| Integran Technologies Inc. | Mississauga | ON | $0 |
| Integrated Engineering Management | San Pedro | CA | $0 |
| Integrated Industrial Technologies, Inc. | Pittsburgh | PA | $0 |
| Integrated Launch Solutions, Inc. | Merritt Island | FL | Subcontractor |
| Integrated Planet Inc. | Las Vegas | NV | Subcontractor |
| Integrated Programs Solutions Inc. | Lexington Park | MD | Subcontractor |
| Integrated Training Solutions And Services JV L.c | Orlando | FL | Subcontractor |
| Integration Engineering Incorporated | King George | VA | Subcontractor |
| Integration Engineering, PLLC | Lenoir City | TN | Subcontractor |
| Integre Technologies, LLC | Pittsford | NY | Subcontractor |
| Integris Composites, Inc. | Goleta | CA | Subcontractor |
| Integrisys LLC | Bethesda | MD | Subcontractor |
| Integrity Analytics LLC | Woodbridge | VA | Subcontractor |
| Integrity PCB Design Inc. | Scottsdale | AZ | Subcontractor |
| Integrity Technology Consultants, Inc. | Clarksville | MD | Subcontractor |
| Integroserv, LLC | Edenton | NC | $0 |
| Intelesis Technologies Corp. | San Diego | CA | $0 |
| Intella Inc. | Huntsville | AL | Subcontractor |
| Intellicom Technologies, Inc. | San Diego | CA | Subcontractor |
| Intelligent Product Solutions Inc. | Hauppauge | NY | Subcontractor |
| Intercontinental Corrosion Engineers, Inc. | Traverse City | MI | Subcontractor |
| Interfuze Corporation | Edgewood | MD | Subcontractor |
| Interlink Engineering, L.L.C. | Phoenix | AZ | $0 |
| Interlynx Group, L.L.C. | New Orleans | LA | $0 |
| International Information And Infrastructure Protection Group, LLC | Christiansted | VI | Subcontractor |
| Intomes Technical Services, Inc. | Bowmansville | NY | Subcontractor |
| Intrinsyx Technologies Corporation | Los Altos | CA | Subcontractor |
| Introba Inc. | Saint Louis | MO | Subcontractor |
| Intuition & Logic Engineering, Inc. | Chesterfield | MO | $0 |
| Investment Engineering | Yarmouth | ME | Subcontractor |
| Iomosaic Corporation | Salem | NH | $0 |
| Iov Solutions LLC | Oakton | VA | Subcontractor |
| Iowa Environmental Services, Inc. | Urbandale | IA | $0 |
| Iparametrics Holdings LLC | Alpharetta | GA | Subcontractor |
| Iron Will Ventures, Inc. | Huntsville | AL | Subcontractor |
| I & S Group Inc. | Mankato | MN | $0 |
| Is International Services, LLC | Lawrenceville | GA | $0 |
| Island Engineering And Design Corporation | Koror | | $0 |
| Island Engineering, Inc. | Piney Point | MD | Subcontractor |
| Ispa Technology, LLC. | Panama City | FL | Subcontractor |
| Itg Global LLC | New Bern | NC | Subcontractor |
| Jaca & Sierra Engineering, PSC | Trujillo Alto | PR | Subcontractor |
| Jacca Consulting Group LLC | Wimauma | FL | Subcontractor |
| Jacobs Engineering Group Inc.Houston, TX · UEI C3YVFTZ26723 | Houston | TX | $0 |
| Jacobs Engineering Group Inc.Atlanta, GA · UEI DHHKS1NPE8M6 | Atlanta | GA | $0 |
| Jacobs Engineering Group Inc.Anchorage, AK · UEI DP5MRYC7JMR6 | Anchorage | AK | Subcontractor |
| Jacobs Engineering Group Inc.Baton Rouge, LA · UEI FN3XXXGGYGK4 | Baton Rouge | LA | Subcontractor |
| Jacobs Engineering Group Inc.Sacramento, CA · UEI H6QSQJEPJH79 | Sacramento | CA | $0 |
| Jacobs Engineering Group Inc.Chicago, IL · UEI J1KDVAAXHH49 | Chicago | IL | $0 |
| Jacobs Engineering Group Inc.Richland, WA · UEI KJRBWL563Z93 | Richland | WA | Subcontractor |
| Jacobs Engineering Group Inc.Portland, OR · UEI F36WC7TG7XD6 | Portland | OR | $0 |
| Jacobs Engineering Group Inc.Boston, MA · UEI FA4YWNTRWB28 | Boston | MA | $0 |
| Jacobs Engineering Group Inc.Austin, TX · UEI GKLHNFJLVCB1 | Austin | TX | Subcontractor |
| Jacobs Engineering Group Inc.Orlando, FL · UEI H1MCGWN4Q4F8 | Orlando | FL | $0 |
| Jacobs Engineering Group Inc.New York, NY · UEI JJ1SM4FXDL69 | New York | NY | $0 |
| Jacobs Engineering Group Inc.Tempe, AZ · UEI VBXLMKKVC5C5 | Tempe | AZ | $0 |
