Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a $584,835,834 cost-plus-incentive-fee modification (PZ0057) to a previously awarded contract (N0001919C0010). This modification adds scope to provide system integration engineering for the development of new ASQ-239 electronic warfare/counter measure hardware in support of the F-35 aircraft for the Air Force, Marine Corps, Navy, and non-U.S. Department of Defense (DOD) participants. Work will be performed in Nashua, N.H. (66%); Fort Worth (27.5%); Linthicum Heights, Md. (5%); various locations within the continental U.S. (1%); and Balderstone, Lancashire, United Kingdom (0.5%), and is expected to be completed in April 2026. Fiscal 2022 research, development, test and evaluation (Air Force) funds in the amount of $33,934,533; fiscal 2022 research, development, test and evaluation (Navy) funds in the amount of $33,934,532; and non-U.S. DOD participant funds in the amount of $14,949,980 will be obligated at the 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, 11/19/21) Gulf Coast note: Eglin Air Force Base, Fla., is home of an F-35 training center and reprogramming labs.