| Gateway Geospatial Group LLC | Providence Forge | VA | Subcontractor |
| Gavco Inc. | Tofte | MN | $0 |
| GBQ Consulting, LLC | Columbus | OH | $0 |
| Geoyeti, LLC | Reston | VA | Subcontractor |
| German Marshall Fund Of The United States - A Memorial To The Marshall Plan (the) | Washington | DC | Subcontractor |
| Gillaspy Associates, Inc. | Somis | CA | $0 |
| Ginger Avocado Consultants Inc. | Baltimore | MD | $0 |
| Gioulis Michael Historic Preservation Consultant | Sutton | WV | $0 |
| Gist Research Limited | Godalming | | Subcontractor |
| Gleason, Eric Brian | The Dalles | OR | $0 |
| Glenn A Singer Incorporated | Corona | CA | $0 |
| Glixx Laboratories, Inc. | Hopkinton | MA | $0 |
| Global Aquatic Research LLC | Sodus | NY | $0 |
| Globaltieskc Inc. | Kansas City | MO | Subcontractor |
| Globeteck Group, Inc. | Honolulu | HI | Subcontractor |
| Gnosis Solutions Inc. | Purcellville | VA | Subcontractor |
| Goldstein Fred T | Princeton | NJ | $0 |
| Gomez Lynne | Bellaire | TX | $0 |
| Grady And Associates, LLC | Ashland | OR | Subcontractor |
| Grameen Foundation USA | Washington | DC | Subcontractor |
| Gram Traffic Counting Inc. | Georgetown | TX | Subcontractor |
| GRD Energy Inc. | San Francisco | CA | Subcontractor |
| Great-circle Technologies, Inc. | Lovettsville | VA | $0 |
| Greater Wisconsin Agency On Aging Resources, Inc. | Madison | WI | $0 |
| Green Cassandra Jo | Frederick | MD | $0 |
| Green & Healthy Homes Initiative Inc. | Baltimore | MD | $0 |
| Green & Healthy Housing Strategies Inc. | Baltimore | MD | $0 |
| Green Leaf Corporation | Saint Paul | MN | $0 |
| Green Mountain Systems, LLC | Oakton | VA | Subcontractor |
| Gregory M White | Ocean Shores | WA | $0 |
| Grones Environmental Services Ltd. LLP. | Elm Mott | TX | $0 |
| Gti Technologies, Inc. | Shelton | CT | $0 |
| Guest Clifton F | Louisville | KY | $0 |
| Hagewood James D | Murfreesboro | TN | $0 |
| Hamercheck Communications Inc. | Madison | OH | $0 |
| Hanan & Associates, Inc. | Rancho Santa Fe | CA | $0 |
| Handle With Care Behavior Management System, Inc. | Gardiner | NY | $0 |
| Hanna Consultants | Kennebunkport | ME | Subcontractor |
| Harpool William R | Rineyville | KY | $0 |
| Harris Marine, Incorporated | Panama City | FL | $0 |
| Haskoningdhv USA Inc. | Washington | DC | Subcontractor |
| Hathaway Global Strategies LLC | Vienna | VA | Subcontractor |
| Hawaii Marine Mammal Consortium | Kamuela | HI | $0 |
| Hawaii Preparatory Academy | Kamuela | HI | $0 |
| Health Connection Of Illinois P.C | Plainfield | IL | $0 |
| Heifer Project International | Little Rock | AR | Subcontractor |
| Helen Keller International | New York | NY | Subcontractor |
| Helm Point Solutions, Inc. | Columbia | MD | Subcontractor |
| Hememics Biotechnologies, Inc. | Gaithersburg | MD | $0 |
| Highgrounds LLC | Potomac | MD | Subcontractor |
| Highland Cyber Strategies LLC | Knoxville | TN | $0 |
| Hinson Consulting, LLC | Westport | CT | Subcontractor |
| Historical Perspectives Inc. | Westport | CT | $0 |
| History Flight Inc. | Fredericksbrg | VA | $0 |
| HLB Consulting LLC | Alpharetta | GA | Subcontractor |
| Hl Construction Management Inc. | Orange | CA | Subcontractor |
| Hollingshead, Dearden & Associates LLC | Palos Verdes Estates | CA | $0 |
| Howard Delafield International, LLP | Washington | DC | Subcontractor |
| Hs Design Inc. | Morristown | NJ | Subcontractor |
| Hull Information Technology Solutions & Services, L.L.C. | Llano | TX | Subcontractor |
| H.w. Croft Consulting LLC | Santa Barbara | CA | Subcontractor |
| Hydronia LLC | Pembroke Pines | FL | $0 |
| Icon Technology Consulting Inc. | Chesterfield | MO | $0 |
| Icrs Service LLC | Tbilisi | | Subcontractor |
| Ideas Depo Skopje | Skopje | | Subcontractor |
| Identifinders International LLC | Fountain Valley | CA | $0 |
| Ideo.org | San Francisco | CA | Subcontractor |
| Idr Federal LLC | Beavercreek | OH | Subcontractor |
| Illinois Network Of Child Care Resource And Referral Agencies | Bloomington | IL | $0 |
| Imagecat, Inc. | Long Beach | CA | Subcontractor |
| Immap Inc. | Washington | DC | Subcontractor |
| Impactmile LLC | Austin | TX | Subcontractor |
| Implicit Solutions, LLC | Annandale | VA | Subcontractor |
| Inaco Group LLC | Leesburg | VA | Subcontractor |
| Indian Institute Of Technology Kanpur | Kanpur | | $0 |
| Indigo Information Services LLC | Tucson | AZ | Subcontractor |
| Indusco Environmental Services Inc. | Mableton | GA | Subcontractor |
| Industrial Nde & Inspection Services Corp. | Caguas | PR | $0 |
| Innovative Solutions Technology Inc. | Greenbelt | MD | Subcontractor |
| Innovative Solutions Unlimited, L.L.C | Piketon | OH | Subcontractor |
| Innovelocity Inc. | San Francisco | CA | Subcontractor |
| Insightful Transitions, LLC | Arlington | VA | $0 |
| Institut De Recherche En Sciences De La Sante | Bobo-dioulasso | | $0 |
| Institute For Development Impact - Ogranak Novi Pazar | Novi Pazar | | $0 |
| Institute For People, Place And Possibilities | Alto | NM | $0 |
| Instrumentation Technical Services, LLC | West Chester | PA | $0 |
| Integra Business Center, Inc. | Allentown | PA | $0 |
| Integrated Learning Innovations, Inc. | Harbor Springs | MI | $0 |
| Integrated Strategic Resources LLC | New York | NY | Subcontractor |
| Integrated Technologies & Services International LLC | Johnstown | PA | $0 |
| Intelligent Technologies Inc. | Herndon | VA | Subcontractor |
| Intepros Incorporated | Plymouth Meeting | PA | $0 |
| Intercept Global Advisors LLC | Pinecrest | FL | Subcontractor |
| Interep, Inc. | Golden | CO | $0 |
| Intermetra Corporation | Medley | FL | $0 |
| International Accreditation Service Inc. | Brea | CA | $0 |
| International Atmo Inc. | San Antonio | TX | $0 |
| International Rescue Committee Inc. | Dallas | TX | Subcontractor |
| Internetwork Consulting Services LLC | Irving | TX | Subcontractor |
| Intertox Inc. | Seattle | WA | $0 |
