Support to several system-level activities throughout phases A to E, such as: Preparation of technical proposals for upcoming Navigation projects Definition of system-level concepts, architectures and technical budgets Provision of various system engineering disciplines including Security, System Software, Operations, Mission Analysis, MTP, Electrical Architecture, EMC/RFC, Radiation Requirements engineering from customer requirements to verification Management of satellite functional and performance requirements Coordinate interfaces across spacecraft, payload, launch and ground segments Technical problem solving in collaboration with subsystem engineers, system engineers, suppliers and customers Preparation of technical documentation for design reviews Definition and review of system-level test specifications and verification plans Support to AIT with procedure development, testing and reporting Participation of campaigns Anomaly support to routine operations of satellites in flight Support to project management in terms of technical risk assessment, schedule inputs, data pack preparation