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The Office of Congressional and Intergovernmental Affairs serves as the primary liaison between the National Nuclear Security Administration (NNSA) and the U.S. Congress, as well as state, local, and tribal governments and nongovernmental organizations.

The Office of Nuclear Energy’s Contract Award to American Centrifuge Operating, LLC (Centrus) for the High Assay Low Enriched Uranium Demonstration Project

The Rosebud Sioux Tribe will install an approximately 149-kilowatt (kW) AC ground-mount solar photovoltaic energy system.

This project will replace refrigeration equipment and display cases with energy efficient systems, use waste heat to provide heat, and lower the cost.

To further its long-term strategic energy plan, the Penobscot Indian Nation (PIN) will install energy efficient measures and a rooftop solar PV.

The Picuris Pueblo is building on the success of its completed 1-megawatt (MW) solar photovoltaic (PV) system.

Ho-Chunk, Inc. (HCI), owned by the Winnebago Tribe of Nebraska, will install 320 kW of solar PV to serve nine tribal facilities.

Tim Walsh's Bold New Vision for EM

Hanford leadership joined industry partners and federal officials at the Waste Management Symposium to discuss the site’s cleanup progress and the path forward for one of the nation’s most complex environmental remediation missions. March 17, 2026

Successful cleanup and reuse efforts underway at the Oak Ridge, Paducah, and Portsmouth sites are vividly illustrating the Office of Environmental Management’s ability to successfully deliver its vision of nuclear restoration and revitalization across the DOE complex, federal and contractor leaders said. March 17, 2026