
Siemens Energy AB · Finspång
A Snapshot of Your Day Imagine working in a team where your expertise in fluid dynamics and thermal analysis drives innovation in product design and performance...
A Snapshot of Your Day
Imagine working in a team where your expertise in fluid dynamics and thermal analysis drives innovation in product design and performance. Collaborate with specialists who use advanced computer modeling techniques to solve complex challenges in combustion CFD, aerothermal CFD and heat transfer. Dive into assessing the thermal tolerance of products, ensuring they function reliably under changing thermal conditions. Work with both solid and fluid systems, applying your analytical skills to optimize component performance and support cutting-edge engineering solutions.
How You’ll Make an Impact
Apply specialized skills in fluid dynamics using computer modeling to analyze and optimize product performance.
Conduct thermal analysis and assess heat transfer for products exposed to varying thermal conditions.
Evaluate the thermal tolerance of components, ensuring reliable operation in both solid and fluid systems.
Collaborate with a team of experts to deliver innovative solutions through advanced simulation techniques.
What You Bring
Master or PhD degree in CFD, mechanical engineering, aerospace engineering, energy or similar
Strong background in fluid dynamics, with experience in turbulence modeling and thermal analysis for both fluid and solid systems.
Enjoys problem solving with good analytical skills to solve complex engineering challenges
Willingness to learn
Ability to work collaboratively within a specialized technical team.
Previous experience with gas turbines or combustion systems is an advantage.
About the Team
Join a dedicated group of engineers in the CFD, Heat transfer and Mechanical integrity team, where specialized skills in fluid dynamics and heat transfer drive product innovation. The team leverages advanced computer modeling techniques to tackle challenges in both solid and fluid systems, ensuring products meet demanding thermal and performance requirements. Our department is highly focused on increasing fuel flexibility, including the use of gaseous and liquid fuels such as hydrogen, ammonia and biofuels. As part of our team of skilled engineers, you will play a crucial role in designing and operating combustion systems that are reliable, robust, and highly efficient.
Together, you’ll collaborate on projects that push the boundaries of engineering and deliver reliable solutions for a wide range of applications.
Our Gas Services division offers Low-emission power generation through service and decarbonization. Zero or low emission power generation and all gas turbines under one roof, steam turbines and generators. Decarbonization opportunities through service offerings, modernization, and digitalization of the fleet.
We can offer you employment benefits such as: reduction of working hours, advance vacation, health care allowance and an eventual possibility to a flexible working place.
Who is Siemens Energy?
At Siemens Energy, we are more than just an energy technology company. With ~100,000 dedicated employees in more than 90 countries, we develop the energy systems of the future, ensuring that the growing energy demand of the global community is met reliably and sustainably. The technologies created in our research departments and factories drive the energy transition and provide the base for one sixth of the world's electricity generation.
Our global team is committed to making sustainable, reliable, and affordable energy a reality by pushing the boundaries of what is possible. We uphold a 150-year legacy of innovation that encourages our search for people who will support our focus on decarbonization, new technologies, and energy transformation.
Find out how you can make a difference at Siemens Energy: https://www.siemens-energy.com/employeevideo
Our Commitment to Diversity
Lucky for us, we are not all the same. Through diversity, we generate power. We run on inclusion and our combined creative energy is fueled by over 130 nationalities. Siemens Energy celebrates character – no matter what ethnic background, gender, age, religion, identity, or disability. We energize society, all of society, and we do not discriminate based on our differences.
Application
Don’t hesitate - apply via https://jobs.siemens-energy.com/en_US/jobs, id nr 284047 no later than 2026-08-07.
Ongoing selection is applied, the role might be filled before last application date.
We refrain from all contact with staffing and recruitment companies, or advertising brokers.
Location: Finspång
Unionen, unionen.finspang.se@siemens-energy.com
Sveriges Ingenjörer & SACO, asi.se@siemens-energy.com
Ledarna, Anders Fors, anders.fors@siemens-energy.com
IF Metall, Mikael Malmgren, mikael.malmgren@siemens-energy.com
Here at The Exploration Company, we are developing, producing, and operating Nyx, a modular and reusable space orbital vehicle that can eventually be refuelled in orbit and that can carry cargo - and potentially humans in the longer run. As a talented Propulsion CFD Engineer, you will be responsible for the computational fluid dynamics analysis of propulsion system components and thruster plumes, providing the flow physics insight that underpins component design, thruster performance, and vehicle-level integration decisions. ROLE OVERVIEW CFD Analysis & Component Simulation * Perform CFD simulations of propulsion components — valves, regulators, orifices, injectors, feed lines — to characterize internal flow, pressure drop, and flow-induced loads. * Support design trade studies by predicting component-level performance across the operating envelope, in both steady-state and transient conditions. * Identify and help resolve flow anomalies such as cavitation, choking, or flow separation that affect component performance. Plume Characterization & Thruster Performance * Model thruster plume characterization, from near-field continuum expansion through far-field rarefied flow, including relevant gas dynamics effects. * Assess plume-induced thermal, contamination, and force/torque effects on adjacent subsystems and vehicle surfaces. * Support thruster and nozzle design by predicting performance parameters such as thrust coefficient and specific impulse from CFD. Cross-Functional Design Collaboration * Work closely with propulsion design engineers and structural and thermal analysts to translate CFD results into actionable design inputs and margins. * Communicate CFD findings and their implications clearly to multidisciplinary teams and program stakeholders. * Support system-level trades on component sizing, thruster placement, and plume shielding for vehicle interfaces. Model Validation, Tools & Documentation * Validate and correlate CFD models against test data — cold-flow testing, hot-fire testing, plume diagnostics — to build and maintain model confidence. * Maintain and improve CFD simulation workflows, meshing practices, and tools to improve turnaround time and consistency across the design office. * Produce clear technical reports and analysis documentation supporting design reviews and certification. KEY RESPONSIBILITIES LOCATION You will perform your duties principally at the Company's premises in Bordeaux and may be required to travel from time to time to our company’s premises in Munich in the course of your duties. WHAT WE WOULD LOVE TO SEE FROM YOU * M.S. or Ph.D. in aerospace or a related field, with 3+ years of hands-on CFD experience relevant to propulsion or fluid dynamics. * Proficiency with CFD software such as ANSYS Fluent, STAR-CCM+, OpenFOAM, or equivalent. * Experience modeling compressible, multiphase, and/or rarefied gas flows relevant to propulsion valves and thruster plumes. * Familiarity with plume characterization methods such as DSMC or continuum-rarefied coupling is a strong plus. * Strong grounding in fluid mechanics, thermodynamics, and gas dynamics fundamentals. * Experience correlating CFD predictions against test data. * Familiarity with scripting or automation (Python, MATLAB) for meshing, post-processing, or workflow automation. * Fluent in English. German and French are an asset Skills and Behaviors: * A hands-on approach to problem-solving, combined with a collaborative mindset to work across multidisciplinary teams * Excellent organizational skills and ability to multitask * Capability of working autonomously whilst collaborating productively with remote teams * Positive and flexible attitude in a constantly evolving environment * Grit to get the job done * Ability to communicate effectively with a wide variety of audiences * Behaviors consistent with The Exploration Company’s core values of Commitment, Innovation, Trust, Quality, and Teamwork Why you should join us! What makes us special here at The Exploration Company and why we think you will enjoy working here is: * We’re Agile - we make decisions fast whilst keeping our goals and systems in mind * We’re Open and Collaborative - we are transparent about risks and obstacles, so that we can cooperate to overcome them * We have a lot of Fun - we refuel our energy knowing we are democratising space. It’s a wonderful and rare opportunity, are YOU up for the challenge? We'd love to hear from you if you wish to be a part of our journey. Please submit your CV now for immediate consideration and we will be in touch shortly. The Exploration Company is an equal opportunity employer and values diversity. We do not discriminate based on race, religion, colour, national origin, gender, sexual orientation, age, marital status or disability status. Relocation assistance is provided for those willing to relocate including visa sponsorship where applicable. All offers are contingent upon the successful completion of a background check, which will be subject to the country, role, and project you applied for. By submitting your application, you acknowledge and agree that any offer of employment may be conditional upon successful condition of this check. The Exploration Company partners with Zinc Work Limited located in the UK (Zinc), a third-party provider, to ensure this process as efficient and transparent as possible. If applicable, you will receive an email from Zinc upon acceptance of your offer with a link to a secure portal where you can provide the required information to Zinc.
Western Norway University of Applied Sciences, Faculty of Technology, Environmental and Social Science has a vacancy for a PhD Research Fellow in Computational Thermal Physics of Human Body A fully funded three-year PhD position in engineering computing is available at the Department of Mechanical and Maritime Studies, Western Norway University of Applied Sciences (HVL). The position is part of the research project ThermRisk: A Personalized Digital Human Model for Predictive Thermal Risk Assessment. The PhD candidate will be responsible for developing a computational thermal model of the human body for the prediction of thermal risks in extreme thermal environments. The PhD candidate will enroll in the PhD programme in Computer Science: Software Engineering, Sensor Networks and Engineering Computing. Start date: 01.01.2027 (can be altered by agreement) Duration: 3 years. Work location: campus Bergen. About the PhD project/ work tasks: • Develop an accurate thermal model of a human body accounting for bio-physical heat- and mass transport phenomena, and within a realistic geometry of the process. • Complement collaborative experiments with numerical in-sights into expected thermal fields in the body and the surroundings. • Validate the model against experimental data produced within ThermRisk. • Develop a simplified workflow for the prediction of thermal risks for a given individual. • The candidate is expected to publish scientific articles in peer-reviewed journals. A minimum of three first-author publications in peer-reviewed journals is required to be eligible to submit the PhD thesis. • As a PhD Research Fellow, you must participate in an approved PhD programme within a period of three years. The successful candidate will be enrolled in the PhD programme in Computer Science, and must meet the enrolment requirements for the PhD programme at the Western Norway University of Applied Sciences. Admission to the PhD programme must be secured within two months of commencing the position. Employment is conditional on meeting the requirements for enrolment. Qualifications: Required: • Master's degree with a strong component of applied computer science (or equivalent) with special focus on computational thermal physics/computational fluid dynamics, with a strong academic record (minimum B average or better). Candidates who have submitted their thesis and will complete the final examination before the interview may apply. In such cases, the application must include a draft version of the Master thesis and an official transcript of completed coursework. • Knowledge of any of the following computational packages OpenFoam, Elmer, STAR-CCM+ or similar. • Strong written and spoken English skills. Desired: • Background in bioheat transfer or human thermoregulation. • Knowledge of methods for CAD geometry repair/healing. • Good knowledge of software engineering or solid programming skills. • Basic background in Machine Learning. • A record of scientific publications is considered beneficial. Personal Qualities: • Strong collaboration and communication skills. • Ability to work independently, take initiative, and contribute innovative ideas. • High level of professional commitment, a structured working style, and strong execution skills. • Motivation to defend the doctoral thesis in 3 years. Application procedure: Applications will be evaluated by an expert panel of three members. Applicants are asked to submit their application and CV online. Please use the link “Apply for this job” (“Søk stillingen”). The following documentation should be uploaded as an attachment to the online application: • Cover letter detailing your motivation and a summary of research experience from your Master's studies • Master's thesis • Academic transcripts and degree certificates • Contact details for 2–3 referees • Published scientific articles and conference abstracts (if any) Applicants should indicate which publications or parts of publications should be given special consideration in the evaluation. If the documents submitted are not in a Scandinavian language or in English, the applicants must submit certified translations of these. The transcripts must specify the topics, the course works, and the grades at the bachelor`s and master`s degree levels. Applicants with a degree from a country other than Norway, need to attach a certified translation of the diploma and transcripts of grades to English or a Scandinavian language, in addition to the original documents, if the original is not in any of these languages. It is required that the applicant encloses a recognition document showing that their degree is equivalent to a Norwegian bachelor’s degree, master’s degree, or PhD. You can read more about applying for recognition of foreign higher education here. The Norwegian Directorate for Higher Education and Skills (HK-dir) offers an automatic recognition document for certain degrees from selected countries. If the applicant’s degree is covered by the automatic recognition, it will be sufficient to attach this document. Read more about automatic recognition here. As the HK-dir application process may take some time it is recommended to apply to HK-dir as soon as possible. If you have not received a recognition document from HK- dir within the application deadline, please enclose documentation from HK-dir showing that they have received your application. Applicants should note that the evaluation will be based on the documentation submitted electronically via Jobbnorge within the submission deadline. The applicants are responsible for ensuring that all the documentation is submitted before the closing date. It is of utmost importance that all publications to be considered in the evaluation are uploaded as an attachment with the application, since these are sent electronically to the expert panel. Applications cannot be sent by e-mail or to individuals at the college. Salary: • Good occupational pension, insurance and loan schemes from The Norwegian Public Service Pension Fund • Exciting academic environment with the possibility of competence enhancement and development • Opportunities for training within the working hours The Research Fellow position is compensated according to position code 1017 Research Fellow. There is a compulsory 2 % deduction to the pension fund (see http://www.spk.no for more information). The successful applicant must comply with the guidelines that apply to the position at any time. General information: The appointment will be made in accordance with the regulations for State employees Law in Norway ("Lov om statens ansatte)". Organizational changes and changes in the duties and responsibilities associated with the position must be expected. State employment shall reflect the multiplicity of the population at large to the highest possible degree. Western Norway University of Applied Sciences Bergen has therefore adopted a personnel policy objective to ensure that we achieve a balanced age and gender composition and the recruitment of persons of various ethnic backgrounds. Information about the applicant may be made public even though the applicant has requested not to be named in the list of applicants. The applicant will be notified if his/her request is not respected. Short-listed applicants will be called in for an interview. Employed on condition that you are granted a work and residence permit (must be considered individually). Western Norway University of Applied Sciences is subjected to The Export Control Regulation. The regulation will be applied in the processing of the applications. Inclusion, challenging norms, collaboration Homepage
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 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 process your personal data for the purpose of managing the recruitment process and assessing your application. For detailed information on how your data is processed, including your rights, please refer to our Privacy Policy. 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. We use Metaview to record interview audio so our team can review it later and stay focused during the conversation. We will record interviews only if you opt in. Please note that we will request your consent separately during the interview process. Participation is completely voluntary and will not affect your application in any way. For more information on how we process your personal data, please see our Privacy Policy.