Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a $120,269,044 cost-plus-incentive-fee modification (P00009) to a previously awarded contract (N0001922C0041). This modification exercises an option to provide continued engineering, maintenance, logistics, and material support in support of the development, production, and sustainment of software builds, as well as to execute developmental flight tests in support of the F-35 Joint Strike Fighter aircraft for the Air Force, Marine Corps, Navy, and Foreign Military Sales (FMS) and non-U.S. Department of Defense (DOD) partners. Work will be performed in Fort Worth, Texas (80%); Orlando, Florida (7%); Linthicum, Maryland (3%); Nashua, New Hampshire (3%); San Diego, California (2%); El Segundo, California (2%); Samlesbury, United Kingdom (1%); various locations within the continental U.S. (CONUS) (1%); and various locations outside CONUS (1%), and is expected to be completed in March 2024. Fiscal 2023 operation and maintenance (Air Force) funds in the amount of $43,134,340; fiscal 2023 operation and maintenance (Navy) funds in the amount of $21,567,167; fiscal 2023 operation and maintenance (Marine Corps) funds in the amount of $21,567,167; fiscal 2023 research, development, test and evaluation (Air Force) in the amount of $3,900,000; fiscal 2023 research, development, test and evaluation (Navy) in the amount of $3,900,000; and non-U.S. DOD participant funds in the amount of $20,721,143 will be obligated at the time of award, $86,268,674 of which will expire at the end of the current fiscal year. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.