The Department of Defense, through the Naval Air Systems Command, is planning to solicit and negotiate multiple contract actions with Pratt & Whitney Military Engines for the F-35 Lightning II Lots 20-22 F135 Propulsion Systems. The procurement aims to secure a total of 109 F-35A, 29 F-35B, and 14 F-35C variant propulsion systems in Lot 20; 122 F-35A, 25 F-35B, and 17 F-35C in Lot 21; and 110 F-35A, 30 F-35B, and 14 F-35C in Lot 22, along with associated support equipment and sustainment services. This initiative is critical for maintaining the operational readiness and modernization of the F-35 fleet, ensuring that the propulsion systems meet evolving defense requirements. Interested parties may submit capability statements for evaluation, with responses due within fifteen days of the notice publication, and should direct inquiries to Ethan Urey at ethan.urey@jsf.mil. The anticipated contract award is estimated for the second quarter of calendar year 2026.