Senior Mechanical Design Engineer

LUX; Oxford; On-site; GBP 60,000 - 84,000; Full time

Job summary

A pioneering engineering firm based in Oxford is looking for a Senior Mechanical Design Engineer to spearhead the design and development of mechanical systems, particularly in hydrogen liquefaction technology. The ideal candidate should have over 5 years of experience in mechanical design, proficiency in Siemens NX software, and a strong grasp of engineering principles. This role offers a competitive salary, generous leave, and professional development opportunities, including a £3,000 training budget and contributions to wellbeing and childcare.

Benefits

Annual Leave: 25 days + bank holidays

5% Pension contribution

Private Health Insurance

Up to £1,000 relocation contribution

£3,000 annual personal development budget

Qualifications

• Minimum 5 years relevant experience in mechanical design engineering roles.
• Experience with Siemens NX CAD software, including part & assembly design.
• Strong understanding of engineering principles.

Responsibilities

• Lead design and development of mechanical systems and components.
• Create detailed parts/models using CAD software.
• Conduct testing and validation of mechanical designs.

Skills

Mechanical knowledge

Communication skills

Problem-solving skills

Education

Bachelor’s degree in engineering or related STEM discipline

Masters degree in Mechanical engineering or related STEM discipline

Tools

Siemens NX CAD software

Job description

Our Offering

• Salary : £60-84k (depending on skills & experience)
• Annual Leave : 25 days + bank holidays
• 1 additional day of leave earned per year (max 5 days)
• 5% Pension contribution
• Private Health Insurance (incl. Mental Health)
• Life insurance
• Annual leave rollover (up to 5 days per year)
• Company stock option scheme
• £50 / month towards wellbeing
• £3,000 annual personal development and training budget
• £500 annual contribution to nursery
• Paid paternity / maternity leave scheme
• Catered lunch on Fridays
• Up to £1,000 relocation contribution

About LUX

LUX is an exciting start-up daring to disrupt existing industry norms and take the lead in revolutionising the approach to Liquid Hydrogen. We are based in Oxfordshire, the centre of Cryogenics R&D in the UK, ideally located for developing our unique Clean ‘Green’ liquid Hydrogen technology. LUX is currently developing the technology to ultimately supply our customers with Clean liquid Hydrogen on-site-on-demand.

We are scaling at pace, raising significant grant funding and private investment. LUX embraces new technologies, processes & methods at the core of our engineering approach. We have a welcome approach to taking risks and believe that learning from failure and iterative testing achieves the best results.

Our ethos is one of informed ideation, focussed risk-taking and passion for change. LUX is seeking candidates who are enthused by the idea of defining new possibilities in engineering Hydrogen liquefaction systems. We are offering candidates an opportunity to work on the cutting edge of liquid Hydrogen innovations, and be fairly rewarded for their time, effort and skills. We are growing fast and we make decisions quickly.

If you feel this could be the journey for you, we would like to hear from you.

Role

As a Senior Mechanical Design Engineer, you will be leading LUX’s core technology design and development on a range of projects and tasks. You will be working with other team members such as project managers, and senior leadership, in addition to external suppliers, to ensure that projects are delivered successfully. The role requires applying your skills and knowledge across a broad range of problems and challenges, sourcing alternative solutions independently and efficiently.

Responsibilities

• ‘Cradle to grave’ Design and development of mechanical systems and components for various projects.
• Create detailed parts/models and assemblies, using CAD software (Siemens NX).
• Ensure Design for Manufacture is implemented into design solutions.
• Produce engineering drawings working to BS8888 following engineering best practice.
• Conduct tolerance stack analyses for components and assemblies.
• Collaborate with team members and external suppliers to ensure design specifications are met.
• Perform system design and integration, including the selection of appropriate components and materials.
• Create P&IDs for various test rigs, sub-systems, systems and testing purposes.
• Perform basic hand calculations to support design process e.g. bending moments, hoop / axial stress etc.
• Conduct and support risk assessments for engineering development and testing needs.
• Perform basic simulations to assess design integrity and performance assessments, such as low-level FEA to verify hand‑calculations.
• Conduct testing and validation of components to ensure functionality and reliability of mechanical designs.
• Provide technical support and guidance to junior designers and engineers.
• Identify and resolve design issues using first principles thinking.

Essential Qualifications, Skills & Experience

• Bachelor’s degree in an engineering or related STEM discipline, OR, additional 2+ years of professional experience in design engineering roles.
• Minimum 5 years relevant experience in mechanical design engineering roles.
• Experienced with Siemens NX CAD software, including part & assembly design, and drafting.
• Ability to create detailed schematics and technical drawings.
• Strong mechanical knowledge and understanding of engineering principles.
• Extensive experience with Geometric Dimensioning and Tolerancing (GD&T) and performing tolerance stack analysis.
• Experience with NX surfacing.
• Note you must have a valid UK driving licence and a suitable vehicle for business‑related travel as part of the role.

Preferred Qualifications, Skills & Experience

• Masters degree or higher in Mechanical engineering or related STEM discipline.
• 7+ years’ relevant experience in mechanical design engineering roles.
• Expert user in Siemens NX CAD software, including part & assembly design, surfacing, and drafting.
• Experience in pressure vessel sizing, design and development projects.
• Experience in valve design, selection, and development projects.
• Proficient in one or more coding languages.
• Excellent problem‑solving skills with a focus on first principles thinking.
• Strong communication skills to effectively collaborate with team members and external suppliers.
• Experienced in designing a diverse range of mechanical components, systems and projects.
• Familiar with Hydrogen related design principles and engineering.
• Experienced / knowledgeable in advanced manufacturing processes such as Additive Manufacturing (3D Printing).
• Experience in cryogenic engineering projects.
• Strong evidence of technical problem solving.

Application

To apply, please email your covering lettering and CV to [e-mail] and ensure to provide the details and contact information for two professional references in your application. Please do not apply via LinkedIn.

Please state if you require a visa / sponsorship to work in the UK. Please quote the following reference number in your email subject : LUX-C3.

Message to Recruiters : LUX will not accept contact or applications for this role through recruitment agents / agencies.