(Junior) Ground Fluid Systems Engineer (m/f/d)

JobsCloseBy Editorial Insights

Isar Aerospace is recruiting a (Junior) Ground Fluid Systems Engineer (m/f/d) for full time, onsite in Ottobrunn, Bavaria. In this role you work closely with Propulsion and Launch Vehicle teams to design fluid systems for test and launch facilities, including rocket engine test rigs, cryogenic storage and distribution, and high pressure gas systems, while translating requirements into functional designs and operation concepts. You will perform sizing calculations or simulations, select hardware, prepare PFDs and P&IDs, lead design reviews and risk assessments, and potentially lead factory and site acceptance tests or commissioning. Requirements include a BSc or MSc in aerospace, mechanical or related engineering, 0 to 5 years of experience, strong fluid mechanics and thermodynamics knowledge, basic high‑pressure/cryogenic system know‑how, fluent English, and willingness to travel. Bonus skills include EcosimPro, Python/Matlab, CFD, and hands-on piping or commissioning experience. To apply, tailor your CV to show practical problem solving and cross‑functional collaboration, quantify impacts, and highlight how you adapt to changing environments; emphasize your interest in ground fluid infrastructure, safety culture, and the opportunity to grow with a fast rising New Space company that offers a generous benefits package and ongoing learning support.

Mission Brief 

We deliver the half of the rocket that stays on the ground. As a Ground Fluid Systems Engineer at Isar Aerospace, you deliver the ground fluid infrastructure required for safe, reliable, and rapid test and launch of the Spectrum rocket. This includes test-rigs for development, qualification, and acceptance of launch vehicle and propulsion systems as well as entire launch bases. You work hand-in-hand with Propulsion and Launch Vehicle development teams to translate their requirements into functional designs and concepts of operations. You tackle complex engineering challenges across multiple projects and phases – from concept to detail design, execution, commissioning, and handover to site owner and operator.

Your Role in Our Space Mission: 

• Design fluid systems for test and launch facilities, including rocket engine test-rigs, structure pressurization test-rigs, integrated stage testing rigs, launch pads, etc.
• Perform sizing calculations and/or numerical simulations for fluid systems, including cryogenic propellants storage, conditioning, and distribution systems, high-pressure gas distribution and pressurization systems, etc.
• Select and procure suitable fluid hardware, including tanks, pumps, heat-exchangers, valves, pressure regulators, safety-valves, instrumentation, etc.
• Prepare technical documentation, such as PFDs and P&IDs, hardware lists, datasheets, technical notes etc. that serve as a basis for manufacturing planning and execution
• Lead and contribute to system design reviews and risk assessments
• Depending on interest and experience: 
  - lead or support factory and site acceptance tests for fluid systems
  - lead or participate in commissioning planning and hands-on site operations
  - support test and launch campaigns on-site or remotely with operations or data analyses.

Qualification Checklist 

• B.Sc. or M.Sc. degree in aerospace, mechanical, process/energy/chemical engineering or an equivalent qualification
• 0 to 5 years of relevant professional experience
• In-depth knowledge of fluid mechanics and thermodynamics and their application to real hardware like valves, regulators, etc.
• Strong analytical skills and able to apply theoretical knowledge to find practical solutions to complex fluid mechanic and/or thermodynamic engineering problems
• Basic knowledge in the design and/or operation of high-pressure gas and cryogenic liquid systems for rocket testing and launching facilities
• Adjusting self-sufficiently and quickly to a changing work environment
• Available for occasional international travel to our test and launch sites
• Fluent in English

Bonus Skills

• Modeling and simulation of fluid systems by means of software such as EcosimPro, Python/Matlab script, and/or CFD
• Hands-on experience with fluid systems, e.g., assembly of piping systems, participating in commissioning or testing operations, etc.

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