Senior Propulsion Engineer

Copenhagen, Denmark
Full Time

We are looking for an experienced Senior Propulsion Engineer to join Orbex, this constitutes a highly versatile position which will expose you to most facets of liquid propulsion development, qualification and test. You will be a responsible engineer for propulsion systems, fluid control systems or major subsystems on our launch vehicle as well as associated ground test benches and GSE.

It is essential that applicants have both practical and theoretical experience in rocketry, it is likely that you have experience designing but also in robust testing procedures, ideally hot fire tests or similar.

The Senior Propulsion Engineer role also provides operational support to development and qualification test campaigns ranging from test plan/procedure definition, to test execution and data analysis. Additionally, senior propulsion engineers work in close, continuous collaboration with in-house production and integration teams to evolve hardware designs for improved quality and manufacturability.


Orbex is a leading micro-launch company with our Prime vehicle being prepared to launch from our home spaceport, Space Hub Sutherland. We are well placed to be one of the first operational micro-launch companies in Europe with over €40m of project financing secured, a number of customers signed up, our launch licence application submitted, and backing from organisations including UKSA and ESA.

We are a rapidly growing company with staff located between our production and test facilities in Forres, Scotland and Copenhagen, Denmark. Working on cutting edge advances in rocket fuel technology, Prime’s carbon footprint is up to 96% lower than comparable vehicles, leading to innovations in propulsion and tank structures. A state-of-the-art re-flight system means we can recover and reuse our technology, and innovations in separation mechanisms mean we leave no debris in space.

Having developed in-house production capability, we can 3D print complex engines, produce full-scale carbon composite fuel tanks, and have avionics and software testing labs in both Scotland and Denmark. Based in Forres, you will be right in the heart of this fast-paced cutting-edge company, gaining a unique insight into what it takes to build a new launch vehicle for a buoyant commercial market.

The Position

Core duties and responsibilities of the Senior Propulsion Engineer role include:

• Being the responsible engineer for a propulsion system or major subsystem, with the goal of delivering complete systems/subsystems in accordance with the development programme plan and specific workstreams.
• Using high level requirements to establish propulsion systems designs from conceptual level through to detailed designs. This includes establishing and modeling rocket engine cycle designs.
• Producing propulsion systems analytical/numerical models to be integrated with launch vehicle FES.
• Conduct part and component level make vs. buy trades.
• Working with in-house and external production teams to design, produce and integrate flight grade propulsion hardware.
• Working with in-house teams to facilitate propulsion development test campaigns and qualification testing.
• Producing and maintaining system/subsystem design documentation.
• Compiling design review data packages and deliverables production for grant programmes.

Qualifications and Experience

• Minimum of a Masters degree in aerospace engineering or a related field
• Bi-prop rocket engine propulsion experience, high and low pressure cycle systems preferable
• Prior experience with Liquid Oxygen fluid systems that you can leverage, hereunder cryogenic propellants, materials compatibility and sealing technology
• Turbo-machinery operations knowledge and cryogenic experience preferable
• Designs for cryogenic fluids, including liquid oxygen.
• Fluid system design software experience, preferably EcosimPro
• CAD / CFD experience, Solidworks / Ansys preferred
• Bi-prop/turbo-machinery ground testing and qualification including ground support equipment and test facility design
• Strong proven knowledge of manufacturing techniques commonly applied in rocket propulsion technology, specific emphasis on additive manufacturing desired.

You will probably have these core attributes:

• 5-8 years of rocket engine, fluid systems and/or turbo-machinery hardware development experience
• Fluency in use of CAD / CFD techniques to model and analyse fluid systems.
• Numerical analysis tool (eg. Matlab/Simulink) proficiency.
• Proven aptitude for core engineering disciplines such as thermodynamics, fluid dynamics, heat transfer, structural analysis etc.
• Team lead and/or project management experience
• Strong communication skills in both written and spoken English


You will have:

• A self-starter mentality, with minimum direction required
• A flexible and dedicated mindset


This role is based in Copenhagen at Orbex’s Danish propulsion engineering and manufacturing site.

You will be spending time both at the factory and our nearby rocket engine testing site, with occasional travel to our main factory, test and launch sites in Scotland.

Copenhagen is one of Europe's most modern and aesthetically interesting cities. It is regarded as being one of the most livable cities in the world, with a strong reputation for being clean, green and sustainable.

With a huge, active waterfront and a lively social scene, Copenhagen offers a wide range of social activities and leisure opportunities, all with a uniquely Scandinavian flair. Activities include cycling and sailing, and the centre of the city is famed for it's cultural highlights.


You must be a UK or European citizen or from a country that is a signatory to the MTCR convention. You must be able to pass a basic security clearance.


For the right candidate we offer an excellent benefits package that includes:-
• Salary of 42,000 – 52,000 DKK per month depending on experience.

• An equity stake in the company so you will really benefit from your hard work as the company grows and is successful. 
• Our roles need to be on-site in Denmark due to the nature of the work as well as export controls and security, we are happy to sponsor visas for you and your family and provide relocation assistance as required which included funding the move and your first month in temporary accommodation so that you can explore the beautiful city of Copenhagen before choosing a place to settle down. 




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