COLSA Corp., Huntsville, Alabama, is being awarded a modification (P00016) to a previously awarded indefinite-delivery/indefinite-quantity contract (HQ0859-20-D-0001) to increase the contract ceiling by $30,000,000 and extend the ordering period. The new ceiling of this contract is increased from $65,700,000 to $95,700,000, and the ordering period is extended from March 17, 2022, to June 16, 2022. Under this modification, the contractor will provide continued support for the Advanced Research Center for mission essential modeling and simulation, analyses, test and evaluation, and experimentation. These efforts will continue network and information infrastructure, test and developmental support, and cybersecurity and network security improvements. The work will be performed in Huntsville, Alabama. The four existing task orders will be modified to extend the period of performance by 3 months, from March 17, 2022, to June 16, 2022. Fiscal 2022 research, development, test and evaluation funds in the amount of $1,500,000 is being obligated at award. One offeror was solicited and one offer was received. The Missile Defense Agency, Huntsville, Alabama, is the contracting activity.