General Dynamics Mission Systems Inc., Quincy, Massachusetts, is awarded a $72,798,641 cost-plus incentive fee, fixed-price incentive fee, cost-plus fixed fee, cost only, and firm-fixed price contract for the retrofit of five Surface Mine Countermeasure Unmanned Undersea Vehicle systems to the Block I configuration and engineering support services. Work will be performed in Quincy, Massachusetts (60%); Greensboro, North Carolina (26%); and Taunton, Massachusetts (14%), and is expected to be completed by April 2023. Fiscal 2021 other procurement (Navy) funds in the amount of $18,686,851 (45%); fiscal 2021 research, development, test and evaluation (Navy) funds in the amount of $13,846,471 (34%); fiscal 2019 other procurement (Navy) funds in the amount of $7,544,561 (18%); and fiscal 2020 research, development, test and evaluation (Navy) funds in the amount of $1,178,535 (3%) will be obligated at time of award, of which $8,723,096 will expire at the end of the current fiscal year. This contract was not competitively procured via the beta.sam.gov website. The contract was awarded in accordance with 10 U.S. Code 2304(c)(1), as implemented under Federal Acquisition Regulation Part 6.302-1 — only one responsible source and no other supplies or services will satisfy agency requirements. The Naval Sea Systems Command, Washington, D.C., is the contracting activity (N00024-21-C-6308).