The Securing Energy Supply Chains Act directs the Secretary of Energy to establish an Energy Non-Procurement List within 90 days, identifying entities detrimental to U.S. national, energy, economic security, public safety, or foreign policy. The Secretary must prioritize entities involved in critical materials and batteries . This list may include entities owned by foreign entities of concern, those on various federal watchlists like the Chinese Military Company List or the SDN list, and their subsidiaries. The list will be revised annually, and an unclassified version, along with classified justifications, will be reported to Congress and publicly published. One year after enactment, the Department of Energy (DOE) and its contractors are prohibited from entering into or renewing contracts with any entity on this list, or those that fund or procure from them. Exceptions are made only if the necessary goods or services are not procurable from alternative sources. Additionally, the bill mandates a study, to be completed within one year, by the Secretary of Energy in coordination with other federal agencies. This study will identify and analyze existing federal lists concerning foreign entities of concern, sanctioned entities, and Chinese military companies. The Secretary must then report to Congress with the study's findings and recommendations for harmonizing these lists to clarify procurement restrictions for the Federal Government.