Fluids Engineer (m/f/d)

Isar Aerospace; Ottobrunn; Vor Ort; EUR 60.000 - 80.000; Vollzeit

Benefits dieser Stelle

Employee Participation Program

30 days of vacation

Company pension plan

Subsidised lunch

Public transport ticket

Sport Clubs membership

Individual learning allowance

Childcare allowance

Zusammenfassung

Isar Aerospace in Ottobrunn is looking for a Fluids Engineer for their Reusability Program. You will analyse propellant behaviour and define propellant management architectures for next-gen reusable launch vehicles.

The ideal candidate has a degree in mechanical, aerospace, or chemical engineering, with 3-5 years of relevant experience. The position offers comprehensive benefits, including 30 days of vacation and an employee participation program.

Qualifikationen

• Strong fundamentals in fluid mechanics, thermodynamics, and cryogenic systems.
• Solid understanding of multiphase flow, including liquid–vapor interfaces and heat and mass transfer.
• 3–5 years of experience in propulsion, fluids, or propellant management related roles.

Aufgaben

• Analyse propellant behaviour across changing thermal conditions and mission phases.
• Define and analyse propellant management architecture.
• Develop reduced order models to support vehicle-level trade studies.

Kenntnisse

Fluent in English

Comfortable balancing analysis fidelity, computational cost, and engineering timelines

Clear communication of complex fluid behaviour to non‑fluids specialists

Ausbildung

Degree in mechanical, aerospace, or chemical engineering

Jobbeschreibung

Mission Brief

As a Fluids Engineer in the Reusability Program, you analyse propellant behaviour across changing thermal conditions, transient operating states, and mission phases including ascent, shutdown, coast, reentry, and relight. Your work directly drives propellant management, pressurization, and feed system design for next‑generation reusable launch vehicles.

Your Role in Our Space Mission

• Define and analyse the overall propellant management architecture, including propellant location, acquisition strategy, residuals, depletion behaviour, and their interaction across mission phases
• Analyse microgravity and low‑acceleration propellant dynamics, including propellant surface behaviour modelled with VOF methods and coupled heat and mass transfer, to drive architectural choices
• Derive tank pressurization concepts from mission requirements and reusability constraints, including transient behaviour across mission phases
• Perform NPSP and inlet margin trades, including the influence of propellant thermal state and transient operating conditions on engine behaviour
• Analyse propellant routing, including feedlines and valves, with focus on transients, operability, and reuse robustness
• Define pressurization and consumables architecture in the context of reusability, including sizing logic, margins, and operational envelopes
• Develop reduced order models from high‑fidelity analyses to support vehicle‑level and program‑level trade studies

Qualification Checklist

Education & Technical Background

• Degree in mechanical, aerospace, or chemical engineering, or a closely related field
• Strong fundamentals in fluid mechanics, thermodynamics, and cryogenic systems
• Solid understanding of multiphase flow, including liquid–vapor interfaces and heat and mass transfer

Experience

• 3–5 years of experience in propulsion, fluids, or propellant management related roles
• Hands‑on experience analysing propellant behaviour at system or architecture level, not only single components
• Practical experience with VOF or comparable multiphase modelling, including thermal effects and free‑surface behaviour
• Exposure to microgravity or low‑acceleration propellant dynamics and their impact on system operability
• Experience deriving or contributing to tank pressurization architectures, including transient behaviour
• Experience abstracting high‑fidelity analysis into reduced order models for vehicle or program‑level trade studies

Skills & Competencies

• Ability to derive propellant management and pressurization architectures from mission requirements, operating envelopes, and reusability constraints
• Capability to quantitatively assess trade‑offs between propellant management concepts using first‑principles analysis, scaling laws, and targeted high‑fidelity simulations
• Critical judgement of model assumptions, numerical limitations, and validity ranges
• Comfortable balancing analysis fidelity, computational cost, and engineering timelines
• Clear communication of complex fluid behaviour to non‑fluids specialists
• Structured, physics‑driven problem‑solving mindset
• Fluent in English (German is a plus)

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

Data Protection

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Disclaimer

Isar Aerospace SE is an equal‑opportunity employer committed to fairness and inclusivity. We do not prioritize any specific religion, gender, nationality, or background. Due to security clearance requirements, affiliations with countries listed under § 13 para. 1 no. 17 SÜG may affect the application process. All qualified applicants are encouraged to apply.