Noblis, Inc., Reston, Virginia, is being awarded a $263,263,830 ceiling cost-plus-award-fee contract to provide advisory and assistance Services in support of the Cooperative Threat Reduction Program. This is a five-year contract with a one one-year base, four one-year options and a maximum six-month option to extend services. The effective date is May 12, 2021. Work will be performed in Lorton, Virginia; and Reston, Virginia, with an expected completion date of May 11, 2026. Fiscal 2019, 2020 and 2021 Cooperative Threat Reduction funds in the amount of $12,350,484 are being obligated at time of award. This award was a competitive acquisition and two offers were received. The Defense Threat Reduction Agency, Fort Belvoir, Virginia, is the contracting activity (HDTRA1-21-F-0033).