Leidos, Inc., Reston, Virginia, is awarded a $36,342,898 modification to previously awarded contract N00024-22-C-6303 to exercise an option for fabrication, test, and delivery of four Medium Unmanned Undersea Vehicle (UUV) engineering development models and associated data and equipment. The contract will support the next generation of the Program Executive Office Unmanned and Small Combatants Unmanned Maritime Systems Program Office Razorback UUV program and the Expeditionary Missions Program Office Viperfish Maritime Expeditionary Mine Countermeasures UUV program. Work will be performed in Fall River, Massachusetts (80%); Lynwood, Washington (16%); Arlington, Virginia (3%); and Newport, Rhode Island (1%), and is expected to be completed by April 2026. Fiscal 2023 research, development, test and evaluation (Navy) funds in the amount of $12,000,000 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.