Lockheed Martin Rotary and Mission Systems, Manassas, Virginia, is awarded an $18,458,461 cost-plus-incentive-fee contract modification to previously awarded contract N00024-20-C-6117 to exercise an option for Foreign Military Sales (FMS) engineering services. This contract modification involves funding from the FMS program. Country name(s) are withheld due to international agreement. Work will be performed in Manassas, Virginia (65%); Clearwater, Florida (32%); Syracuse, New York (2%); and Marion, Florida (1%), and is expected to be completed by August 2030. FMS funds in the amount of $500,000 will be obligated at time of award and will not expire at the end of the current fiscal year. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.