Senior Thermal Engineer (m/f/d)

Mission Brief You will be responsible for defining the thermal environment and architecture of the vehicle, ranging from detailed thermal modeling and system level coupled loads analyses and to active and passive thermal control design. You will be in charge of the development, execution, and correlation of thermal models using FEM/FDM/FVM tools and test data. The decisions you make will directly support hardware qualification, test planning, and system-level design choices, ultimately enhancing the thermal robustness, performance, and reliability of the vehicle throughout its mission. Your Role in Our Space Mission : Own the vehicle-level thermal architecture, including active and passive thermal control design for the avionic components and payloads Perform Thermal Coupled Loads Analysis and develop detailed thermal models using FEM and/or FVM, FDM methods Develop, execute, and correlate thermal models using tools such as SIMCenter, STAR-CCM+ and Thermal Desktop supported by component tests and flight data Review, assess, and approve component- and assembly-level designs for thermal flight readiness Create and maintain specifications and design documentation such as Fluid Plans, Test Plans and Procedures, Test and Analysis Reports, Instrumentation Plans, Work Instructions etc. Develop tools, workflows, and standards to improve efficiency, consistency, and repeatability across thermal engineering activities Support integration, test, and launch-site operations as subject-matter expert on system thermal performance Support with your expertise other technical departments Qualification Checklist Degree in the field of Aerospace of Mechanical Engineering, or similar 8+ years of relevant experience in the field of aerospace and thermal Experience with thermal simulation tools (e.g. ANSYS, SIMCenter, Thermal Desktop) Experience with coding (e.g. Python, MATLAB) Holistic perspective on development of systems Highly organized and proactive with high attention to detail Good communication and organizational skills Fluent in English Bonus Skills Experience with environmental control system design German language skills Benefits Employee Participation Program: Share in our success through our virtual company share program 30 days of vacation: Enjoy the days off to relax and recharge Company pension plan: Secure your future with our company pension plan, featuring a 20% employer contribution after the probation period Subsidised lunch: Stay energised with delicious, subsidised lunches every day Public transport ticket: Commute with ease using a fully financed Deutschlandticket Sport Clubs membership: Stay fit with our sponsored sports club memberships (EGYM Wellpass) Individual learning allowance: Grow your skills with an individual learning budget granted after the probation period Childcare allowance: Receive a childcare allowance for your non-school-age children And Much More! Discover additional perks and benefits when you join our team Who we are We are Isar Aerospace and we are at the forefront of New Space building a modern space business to enable faster, better and cheaper access to space. Our mission is to help democratise space and use it for good in order to improve life on Earth now and for the future generations. We are a fast-growing company aiming to provide sustainable and environmentally friendly launch solutions for small and medium-sized satellites and constellations into Low Earth Orbit. The company is privately funded by world-leading technology investors with strong commitment and support and our team is made of driven and talented people with a real passion for space innovation. We're making rockets in a way that hasn't been done before disrupting a traditional industry. If you are up for the challenge, want to work on cutting-edge projects and be part of a team changing the world for better, come, join us and launch your career! Want to find out more about us? Visit www.isaraerospace.com Data Protection We proces