Marinette Marine Corp., Marinette, Wisconsin, was awarded a $38,172,896 cost-plus-fixed-fee modification to previously awarded contract N00024-20-C-2300 to exercise an option for fiscal 2021 engineering and class services requirements in support of detail design and construction of the Constellation-class guided-missile frigate. Work will be performed in Marinette, Wisconsin (40%); Newport News, Virginia (25%); New York, New York (10%); Philadelphia, Pennsylvania (10%); Ayer, Massachusetts (5%); Arlington, Virginia (5%); Herndon, Virginia (2%); Camden, New Jersey (2%); and Tulsa, Oklahoma (1%), and is expected to be completed by August 2022. Fiscal 2021 shipbuilding and conversion (Navy) funds in the amount of $5,000,000 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. (Awarded Aug. 16, 2021)