In order to support Human Space Flight (HSF), Leidos designs, develops, deploys, runs, maintains, and sustains mission control and training systems. Our backend work allows uninterrupted operations, role-based security authentication, and NASA standard infrastructure. We also create, support, and manage large-scale satellite command and control systems, drawing on our expertise in telemetry and ground command and control disciplines. Over two million lines of code have been produced by our most recent system to support the International Space Station and all visiting vehicles.