Lockheed Martin Corp., Fort Worth, Texas, is awarded a $53,415,771 modification (P00003) to a previously awarded, cost-plus-incentive-fee contract (N0001922C0015) that provides continued engineering and other related activities in support of the design and development of a Joint Strike Fighter aircraft variant tailored for an unspecified Foreign Military Sales (FMS) customer. Work will be performed in El Segundo, California (56%); Fort Worth, Texas (43%); and Tempe, Arizona (1%), and is expected to be completed in July 2026. FMS funds in the amount $53,415,771 will be obligated at time of award, none of which will expire at the end of the current fiscal year. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.