General Dynamics Mission Systems, Fairfax, Virginia, is awarded a $14,104,200 cost-plus-fixed-fee undefinitized contract action modifying previously awarded contract N00024-21-C-6425 to procure Hammerhead prototype design efforts. Work will be performed in Taunton, Massachusetts (29%); Braintree, Massachusetts (16%); Andover, Maryland (12%); Fairfax, Virginia (12%); Greensboro, North Carolina (9%); Groton, Connecticut (6%); Lincoln, Nebraska (6%); Bloomington, Minnesota (6%); Pittsfield, Massachusetts (3%); and Quincy, Massachusetts (1%), and is expected to be completed by September 2023. Fiscal 2022 research, development, test, and evaluation (Navy) funds in the amount of $1,000,000 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.