ManTech International Corp., Herndon, Virginia, is awarded a $13,822,604 cost-plus-fixed-fee modification (P00013) to a previously awarded indefinite-delivery/indefinite-quantity contract (N0042117D0032). This modification increases the ceiling to provide engineering support to include reliability, maintainability, testability, quality assurance, diagnostic and system safety analyses in support of the design, development, production, and in-service cycles of all naval carrier based tactical aircraft, shipboard capable vertical/short takeoff and landing aircraft, maritime support aircraft, unmanned aircraft, tactical weapons systems, support systems, and equipment and aircraft launch and recovery equipment. Work will be performed in Patuxent River, Maryland (91.5%); Yuma, Arizona (1.7%); Luke Air Force Base, Arizona (1.7%); Edwards AFB, California (1.7%); China Lake, California (1.7%); and Quantico, Virginia (1.7%), and is expected to be completed in November 2023. No funds will be obligated at time of award; funds will be obligated on individual orders as they are issued. The Naval Warfare Center Aircraft Division, Patuxent River, Maryland, is the contracting activity.