The role will be responsible for the entire Data Handling subsystem: from requirements definition to design, functional testing, and support for mission operations. The role involves interaction with the Satellite and Avionics teams throughout the development cycle and managing technical exchanges with suppliers. **Main responsibilities:** - Complete design of the Data Handling subsystem for various missions and platforms - Analysis of subsystem specifications - Definition of the Data Handling architecture and data interfaces - Definition of data budgets and selection/configuration of data protocols - Drafting of input specifications for Data Handling units - Participation in procurement: defining Statements of Work, technical meetings, and document reviews - Development support: Design & Development plans, technical coordination, documentation review, and planning support - Support for AIV/AIT activities - Support for unit, subsystem, and system-level testing: test specification definition, test report review, and participation in tests - Support for operations definition and operational activities during the mission.