This bill amends the Department of Energy Organization Act to define “critical energy resource” and add a statutory DOE mission to ensure adequate, reliable supplies. It requires ongoing DOE assessments of resource criticality, supply-chain vulnerabilities, domestic diversity, capacity constraints, regulations, import reliance, and adversarial nation exploitation. The Secretary must facilitate strategies to diversify sources, increase domestic production/separation/processing, develop substitutes, and improve reuse and recycling. A report to relevant congressional committees is required within two years describing assessments and actions taken.