The Department of Energy's National Nuclear Security Administration (NNSA) intends to award a sole source contract to ManTech Advanced Systems International Inc. for security services critical to its operations. The contract will encompass a one-year base period with a potential six-month extension, focusing on providing expert security personnel and comprehensive expertise in security program management and various security disciplines. This procurement is vital for supporting sensitive operations central to NNSA's mission, with plans for a competitive action for a longer-term contract anticipated by the end of fiscal year 2025. For inquiries, interested parties should contact Rubina Satar at Rubina.Satar@nnsa.doe.gov, noting that this notice is not a solicitation for proposals or quotations.