DOD Installation Services: Action Needed to Improve Oversight of Intergovernmental Support Agreements

What GAO Found Based on data provided by the military services, GAO found that the services’ use of intergovernmental support agreements (IGSA) with state, local, and tribal government entities (public partners) for installation-support services increased from 45 across all DOD installations in 2018 to 316 in 2025. Officials from DOD, the Army and Navy, and selected military installations said they intend to promote future IGSA use. However, military services’ estimates of cost savings did not reflect best practices for cost estimation, which raises questions about their completeness and relia