System High Corp., Chantilly, Virginia, has been awarded a $24,200,840 modification (P00019) to previously awarded task order HR0011-17-F-0001 for program security services. The modification brings the total cumulative face value of the task order to $69,223,019 from $45,022,179. Work will be performed in Arlington, Virginia, with an expected completion date of March 2020. Fiscal 2019 research and development funds in the amount of $21,769,143 are being obligated at time of award. The Defense Advanced Research Projects Agency, Arlington, Virginia, is the contracting activity.