Lockheed Martin Rotary and Mission Systems, Manassas, Virginia, is awarded an $85,563,849 indefinite-delivery/indefinite-quantity contract with cost-plus-fixed-fee and firm-fixed-price contract line item numbers for systems engineering and technical services for hardware and software interfaces.  Work will be performed in Manassas, Virginia (50%); West Bethesda, Maryland (43%); San Diego, California (1%); Bangor, Washington (1%); Pearl Harbor, Hawaii (1%); Kings Bay, Georgia (1%); Norfolk, Virginia (1%); Dahlgren, Virginia (1%); and New London, Connecticut (1%), and is expected to be completed by June 2027.  Fiscal 2021 other procurement (Navy) (72%) funds in the amount of $10,326,201; 2020 other procurement (Navy) (13%) funds in the amount of $1,856,497; 2021 research, development, test and evaluation (Navy) (6%) funds in the amount of $866,000; 2021 operation and maintenance (Navy) (6%) funds in the amount of $800,000; and 2018 shipbuilding and conversion (Navy) (3%) funds in the amount of $400,000 will be obligated at time of award, of which, funds in the amount of $800,000 will expire at the end of the current fiscal year.  This contract was not competitively procured in accordance with 10 U.S. Code 2304(c)(1) — only one responsible source and no other supplies or services will satisfy agency requirements.  The Naval Surface Warfare Center, Carderock Division, West Bethesda, Maryland, is the contracting activity (N00167-21-D-0007). (Awarded June 18, 2021)