| Item | Obligations |
|---|---|
| Department of Health and Human Services | $125M |
| Department of Homeland Security | $37.7M |
| Environmental Protection Agency | $22.9M |
| Department of Defense | $21.7M |
| Department of Transportation | $18.1M |
| Department of Justice | $12.5M |
| National Science Foundation | $11.8M |
| Department of the Interior | $10.1M |
| Department of Commerce | $8.3M |
| Department of Agriculture | $6.2M |
Department of Health and Human Services is Icf Incorporated L L C's largest federal customer, with $125M obligated (46.4% of the company's federal obligations).