Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a $71,367,372, firm-fixed-price modification (P00023) to a previously awarded contract (N0001922C0041). This modification adds scope to provide hardware in the loop primary mission equipment for labs supporting the integration and sell-off of F-35 Joint Strike Fighter aircraft in support of the Navy, Air Force, Marine Corps, and non-U.S. Department of Defense (DOD) partners. Work will be performed Fort Worth, Texas (81%); Orlando, Florida (7%); Linthicum, Maryland (3%); Nashua, New Hampshire (3%); San Diego, California (2%); El Segundo, California (2%); Samlesbury, United Kingdom (1%); and various locations within the continental U.S. (1%), and is expected to be completed in December 2025. Fiscal 2024 research, development, test and evaluation (Air Force) funds in the amount of $29,183,867; fiscal 2024 research, development, test and evaluation (Navy) funds in the amount of $29,183,867; and non-U.S. DOD participant funds in the amount of $12,999,638, will be obligated at the time of award, none of which will expire at the end of the current fiscal year. Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.