Propulsion Design Engineer, Propulsion (m/f/d)

Mission Brief

As Propulsion Design Engineer with focus on engine cycle calculations you will be responsible for the implementation of engine models to provide load point predictions, engine performance uncertainty quantifications, and provide engine performance models and parameters for the flight software the to Guidance Navigation and Control Team. You will be working within the Turbopump Team and collaborate with system owners of all subcomponents of the engine.

Your Role in Our Space Mission

• Develop and maintain modular engine models of existing engines and fluid systems as well as conceptual engines in the development phase for engine load point predictions and performance studies.


• Coordinate with product owners and ensure model characterization of every subcomponent of the engine and maintain component performance database.


• Provide load point predictions during development and test campaigns and define acceptance criteria for flight engines / qualification tests with respect to engine performance.


• Develop tools for engine load point predictions to ramp up acceptance testing cadence and build and maintain component characterization database.


• Serve as point of contact to provide engine performance metrices for the flight software to Guidance Navigation Controls and conduct uncertainty quantification for such metrices.


• Maintain database of characteristic parameters such as Isp and mass flow as well as lookup tables for engine transients.


• Maintain secondary engine models relevant for rocket kinematics in all phases of the mission such as thrust generated by chill down bleed flows, purges etc.


• Conduct conceptional engine performance studies in early development of future launch systems or iterations of Spectrum.


• Ensure consistent data acquisition quality of engine performance parameters in development testing, stage testing and flight.


• Define Sensor requirements for in flight performance verification of the engines.


• Elaborate uncertainty propagation of the entire measurement chain in collaboration with test rig responsibles to maintain a high data quality standard.

Qualification Checklist

• M.Sc. degree in mechanical engineering, aerospace engineering or similar.


• Exceptional knowledge in thermodynamics and rocket motor system architecture as well as sub system interactions.


• Knowledge in measurement technology and stochastic analysis (Uncertainty Quantification and propagation).


• Fundamental understanding of combustion, thrust chambers, valves and turbopump systems.


• Proven experience in developing and validating empiric, semi empiric or analytical models as well as setting up cycle models of complex fluid systems/machinery


• Effective collaborator in multi-disciplinary and cross-functional teams, organized, detail-oriented, and proactive. Ability to adapt to shifting priorities.


• Driven and eager to learn, passionate about new space, fluent in English

Bonus Skills

• Professional work experience in rocket propulsion development.


• Working experience in Simulink or cycle model development in rocket/aircraft engines or similar


• Willingness to travel to support engine test campaigns and launch campaigns abroad.

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


• Rental clothing with laundry service: Enjoy hassle‑free workwear with our convenient rental clothing and laundry service


• 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


• Flexible mobility budget : Travel your way with a choice between a fully financed Deutschlandticket, JobRad bicycle leasing, FINN JobAuto, or a fuel allowance

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