Thermal Engineer - CFD

ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement & support sustainable transformation.

Our teams of passionate and agile engineers work on cutting-edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today.

Join us and start building tomorrow’s world today!

As a Thermal Engineer – CFD, you will join the team in Luton to support our activities within the aerospace sector.

You will support the development and optimisation of cooling system designs for aircraft electrical power generators and electrical motors. Using advanced thermo-fluid modelling and simulation tools, you will analyse thermal performance and contribute to the design and selection of cooling components for both new and existing products.

• Location: Luton
• On Site: Hybrid
• Clearance: Clearable
• Experience Level: Junior to Mid

Key Responsibilities:

• Conduct CFD and thermal modelling to predict the thermal performance of electrical machines and systems
• Support the design and optimisation of cooling systems for aircraft electrical generators and motors
• Perform thermo-fluid analysis using appropriate simulation tools to support engineering programmes
• Produce technical reports and analysis summaries to support design reviews and programme milestones
• Provide thermal analysis input for new product development, RFIs, and proposals
• Collaborate with design engineers and programme teams to support engineering decisions and product performance
• Support multiple projects while ensuring analysis and deliverables are completed within agreed timelines

Required Skills:

• Strong understanding of thermodynamics and fluid dynamics principles
• Experience performing CFD and thermal analysis within engineering environments
• Competent in ANSYS simulation tools including Workbench and Fluent
• Ability to interpret engineering requirements and translate them into simulation models and analysis
• Experience producing technical documentation and presenting results to engineering teams

Required Qualifications:

• A Bachelor’s or Master’s degree in Engineering, or equivalent military experience.
• Experience using ANSYS tools such as Fluent, Workbench, SpaceClaim, or Discovery

Desirable Skills:

• Experience using Motor-CAD or similar electrical machine thermal modelling tools
• Experience performing thermo-fluid simulation for rotating electrical machines
• Experience within aerospace or electrical propulsion systems
• Ability to perform first principle calculations or 1D thermal modelling to validate simulation results

Why join us? 

We bring together entrepreneurial, tech-driven people to deliver innovative solutions for leading companies.

At ALTEN, you’ll work on exciting projects, supported by ongoing learning, mentoring, and clear career development tailored to your goals.

Join a passionate team and help build tomorrow, today.

In short you get: 

• A personalised career path and a rewarding management style 
• A huge diversity of engineering projects and industries
• Private Medical Insurance
• Cycle & Tech Scheme 
• Employee assistance programme
• Life insurance & Pension Scheme
• Social atmosphere, regular gatherings & team buildings
• Flexible way of working (role dependent)

We are proud to support the Armed Forces Covenant & actively encourage applications from members of the Armed Forces community, including veterans, reservists, service leavers, and military spouses/partners. We recognise the value of military skills and experience and are committed to ensuring that no applicant is unfairly disadvantaged during our recruitment and selection processes. 

ALTEN is committed to fostering a diverse and inclusive workplace and values the strength that comes from a global mix of backgrounds and perspectives. We welcome applications from all suitably qualified candidates, regardless of background or protected characteristics under the Equality Act 2010. If you require any reasonable adjustments during the recruitment process, please let us know. 

This role may require you to have or be willing to go through Security Clearance. As part of the onboarding process candidates will be asked to complete a Baseline Personnel Security Standard; details of the evidence required to apply may be found on the government website Gov.UK. If you are unable to meet this and any associated criteria, then your employment may be delayed, or rejected . Details of this will be discussed with you at interview.