Top Contractors
| Rank | Contractor | Amount |
|---|---|---|
| #1 | Hensel Phelps Construction Co. | $1.4B |
| #2 | Xator LLC | $1.1B |
| #3 | Olin Winchester, LLC | $1.1B |
| #4 | Guidehouse Inc. | $747.4M |
| #5 | Smartronix, LLC | $599.4M |
| #6 | Icf Incorporated, L.l.c. | $489.1M |
| #7 | Manson Construction Co | $415.0M |
| #8 | Acacia Center for Justice | $381.4M |
| #9 | Thalle Construction Co Inc. | $366.0M |
| #10 | Family Endeavors, Inc. | $365.1M |
Department of the Interior is one of the data points covered by this site’s U.S. federal government spending dataset. The detail above comes directly from USASpending.gov federal awards data; the context that follows situates the headline numbers against the broader distribution across U.S. federal contracts, grants, and awards.
Every number on this page links back to USASpending.gov federal awards data; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for Department of the Interior’s peers within U.S. federal contracts, grants, and awards. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.