The Department of Defense, specifically the Department of the Air Force, is conducting a Sources Sought Announcement for the Low Observable Signature & Supportability Modifications (LOSSM) program aimed at enhancing the B-2 aircraft's maintenance capabilities. The primary objective is to identify potential contractors with expertise in procurement, analysis, integration, testing, and sustainment of systems designed for Radar Cross Section (RCS) signature defect inspections, focusing on the development of integrated Vector Network Analyzer (VNA) systems that eliminate measurement errors and improve user experience. This initiative is critical for maintaining the B-2's low observable capabilities and ensuring compliance with security requirements, including the need for systems to meet JSIG standards for an Authority to Operate (ATO). Interested parties must respond by January 31, 2026, providing detailed information on their capabilities, and can contact Alana Williams at alana.williams.1@us.af.mil for further inquiries.