Performs corrective and preventive maintenance on the aerostat telemetry and control subsystems, power and control subsystems, tether subsystem, meteorological equipment, ground station electronic subsystems, payload and communications subsystems, and site facility electronics as appropriate. Exercises independent judgment in performing such tasks as making circuit analyses, calculating wave forms, tracing relationships in signal flow, and regularly using complex test instruments (e.g., dual trace oscilloscopes, Qmeters, deviation meters, pulse generators).