Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a not-to-exceed $206,832,036 undefinitized modification (P00012) to a cost-plus-incentive-fee, cost-plus-fixed-fee order (0097) against a previously issued basic ordering agreement (N0001914G0020). This modification adds scope to provide non-recurring engineering, detailed aircraft modification execution planning and technical data packages in support of modifications to the F-35 developmental test fleet aircraft. These modifications are necessary to support flight tests for the F-35 developmental test fleet and for the capabilities delivered under the F-35 Block 4 modernization in support of the Joint Strike Fighter Program for the Air Force, Marine Corps, Navy, and non-U.S. Department of Defense (DOD) participants. Work will be performed in Fort Worth (60%); Patuxent River, Md. (20%); and Edwards Air Force Base, Calif. (20%), and is expected to be completed in December 2025. Fiscal 2021 research, development, test and evaluation (Air Force) funds in the amount of $5,000,001; fiscal 2021 research, development, test and evaluation (Navy) funds in the amount of $5,000,001; and non-U.S. DOD participant funds in the amount of $2,202,771 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, Md., is the contracting activity. (Source: DoD, 10/20/21) Gulf Coast note: Eglin Air Force Base, Fla., is home of an F-35 training center and reprogramming labs.