The Department of Defense, specifically the Naval Air Systems Command, is seeking proposals for the TR-3 Follow-On Activities related to the F-35 “Lightning II” Program. This procurement focuses on the incremental modernization efforts for the F-35, including the development and delivery of Block 4 and Block 5 upgrades, systems engineering, prototype construction, and comprehensive testing to ensure operational readiness and system integration. The contract will be awarded on a sole source basis to Lockheed Martin Aeronautics Company, the sole designer and manufacturer of the F-35, due to their unique capabilities and proprietary knowledge. Interested parties may submit capability statements within 15 days of this notice, and for subcontracting opportunities, they should contact Sean Lightcap at 817-584-1276.