The jobholder performs analyses reports relevant for the delegated work package, leveraging tools, methods and models in force for the related activity and following the established policy. The tasks include: • Execution of theoretical investigations, computations and estimations in connection with thermal aspects of spacecraft and space transport systems • Establishment and/or discretisation of thermal mathematical models (TMMs) in ESATAN TMS format and/or discretisation of Computational Fluid Dynamics (CFD) models analysis of launcher upper stages and related cavities including application of these models • Performance of thermal analyses and / or CFD analyses for new developments (e.g. Airiane 6 Upper Liquid Propulsion Modules (A6-ULPM)) • Thermal investigations and analyses in co-operation with other specialist areas, like e.g. structure mechanics and propulsion systems • Thermal analysis and design of components for the A6 ULPM • Establishment of thermal environment specifications for A6 ULPM subsystems, components, test plans and specifications, as well as review of existing test plans • Participation in thermal tests for verification of existing thermal and/or CFD models • Establishment of Thermal and/or CFD Analysis reports as well as generating of presentation handouts and verbal presentation of study results to internal and external customers, primarily in English Persönlich Anforderungen: • Willingness for occasional business trips (within Europe) • Flexibility and ability to work under pressure • Team player with experience of working in international teams and consideration of cultural differences • Excellent communication skills and the ability to perform professional presentations in front of auditories of all levels • Willingness for occasional workshifts within the frame of testacitivties