Fluor Marine Propulsion LLC, Arlington, Virginia, is awarded a $1,396,995,054 cost-plus-fixed-fee modification to previously awarded contract (N00024-18-C-2130) to exercise fiscal 2025 options for naval nuclear propulsion work at the Naval Nuclear Laboratory. Work will be performed in Pittsburgh, Pennsylvania (52%); Schenectady, New York (39%); and Idaho Falls, Idaho (9%). Fiscal 2024 other procurement (Navy) funding in the amount of $14,979,962 (79%); fiscal 2024 research, development, test and evaluation in the amount of $3,551,000 (19%); and fiscal 2022 other procurement (Navy) funding in the amount of $495,000 (2%), will be obligated at time of award and funds in the amount of $495,000 will expire at the end of the current fiscal year. Naval Sea Systems Command, Washington, D.C., is the contracting activity.