The Department of Defense, through the Marine Corps Systems Command (MCSC), intends to enter into sole-source negotiations with Hyperion Technology Group, Inc. for a contract modification (M6785423D6503) to provide Post Deployment Software Support (PDSS) for the Scalable Passive Acoustic Reporting and Targeting Node (SPARTN) system. This procurement aims to enhance SPARTN's software and firmware capabilities against digital threats, including necessary cybersecurity updates and Engineering Change Proposals (ECPs) to ensure the system's life cycle sustainability. The SPARTN system is critical for defense operations, requiring specialized technological updates that only Hyperion can provide due to its proprietary technology. The contract modification is expected to be awarded in the second quarter of Fiscal Year 2025, with a completion date of June 27, 2026. Interested parties may submit capability statements to Keane Butts at keane.butts@usmc.mil or Peggy Smith at peggy.l.smith1@usmc.mil within 15 days of this notice.