The government is issuing a sources-sought notice to conduct market research for engineering services supporting the fielding, integration, and modernization of the Lower Tier Air and Missile Defense Sensor (LTAMDS) radar system. Services include training software and devices, integration into the Integrated Battle Command System, engineering technical assistance for flight test support, and system-level engineering activities such as program management, configuration management, software engineering, and testing. Interested contractors must demonstrate expertise in system-level integration, repair, and performance-based logistics, including depot-level maintenance and supply support. The anticipated performance period is projected to commence on or about 1 November 2026. This is not a solicitation, and no specific budget or performance location is identified at this time.