At a Glance
- Tasks: Lead engineering teams in nuclear decommissioning and develop innovative mechanical solutions.
- Company: Cavendish Nuclear, a leader in creating a safe and secure world.
- Benefits: Generous holiday allowance, matched pension scheme, and health support.
- Other info: Flexible working options and excellent career development opportunities.
- Why this job: Join a pivotal role in a major civil nuclear programme and make a real impact.
- Qualifications: Engineering degree and extensive experience in leading technical projects.
The predicted salary is between 60000 - 80000 £ per year.
Location: Whitehaven, Cumbria + Hybrid Working Arrangements
Compensation: Competitive + Benefits
Role Type: Full time / Permanent
Lead Engineering Excellence in Nuclear Decommissioning
At Cavendish Nuclear, we’re working to create a safe and secure world, together. If you join us, you can play your part as a Principal Mechanical Engineer at either of our Westlake’s Science Park, Moor Row or Warrington, Cheshire sites.
As a Principal Mechanical Engineer, you’ll play a pivotal role in one of the UK’s major civil nuclear decommissioning programmes. Working as a senior technical authority within a multidisciplinary engineering environment, you’ll drive the integration of complex mechanical systems and develop innovative solutions that directly support the safe deconstruction and long‑term management of nuclear facilities. You’ll lead engineering teams, oversee high‑integrity technical outputs, safeguard design quality, and act as a primary interface for customers—while mentoring engineers and championing continuous improvement across projects. This role places you at the technical forefront of a major expansion within the Cavendish Nuclear Design Services Alliance.
Day‑to‑day responsibilities include:
- Lead and manage multidisciplinary engineering teams to deliver high‑quality technical solutions
- Supervise and mentor engineers and technical specialists to ensure performance and development
- Act as a key liaison with customers, ensuring transparent communication and technical clarity
- Oversee production, review, and approval of engineering outputs—including calculations, specifications, and reports
- Champion safety, quality, and engineering best practice across all project activities
This is a full‑time position working 37 hours over 5 days per week, based at either of our Westlake’s Science Park, Moor Row or Warrington, Cheshire sites.
Essential experience:
- Extensive experience leading multidisciplinary engineering teams and delivering complex technical projects
- Proven ability to supervise and mentor engineers and technical specialists
- Strong background in producing, reviewing, and approving detailed engineering outputs
- Demonstrated expertise in applying procedures, codes, and standards to ensure compliance and integrity
- Track record of effective customer engagement, issue resolution, and technical support
Qualifications:
- Engineering degree (or equivalent) in a relevant engineering discipline
Security Clearance: The successful candidate must be able to achieve and maintain Standard (BPSS) security clearance for this role.
What we offer:
- Generous holiday allowance
- Matched contribution pension scheme, with life assurance
- Access to a Digital GP, annual health check, and nutritional consultations through Aviva DigiCare+
- Employee share scheme
- Employee shopping savings portal
- Payment of Professional Fees
- Reservists in the armed forces receive 10‑days special paid leave
- Holiday Trading allows UK Cavendish employees to buy additional leave or to sell up to one working week of annual leave from their annual entitlement. This window opens February through to March annually
- Be Kind Day enables employees to take one working day’s paid leave a year (or equivalent hours) to undertake volunteering work with their chosen organisation or registered charity
- Excellent development opportunities and benefits package including an employee assistance programme supporting physical, mental and financial wellbeing
We are a disability confident committed employer. If you have a disability or need any reasonable adjustments during the application and selection stages, please email with the subject header “Reasonable adjustments requirement”. We’re committed to building an inclusive culture where everyone’s free to thrive. We are happy to talk about flexible working – please ask about alternative patterns of work at interview.
Closing date: 19/06/2026
Principal Mechanical Engineer in Egremont employer: weServed
Cavendish Nuclear is an exceptional employer, offering a dynamic work environment in Whitehaven, Cumbria, where you can lead engineering excellence in nuclear decommissioning. With a strong focus on employee development, generous benefits including a matched pension scheme and health support, and a commitment to inclusivity and flexible working, we empower our team to thrive while making a meaningful impact on safety and innovation in the nuclear sector.
StudySmarter Expert Advice🤫
We think this is how you could land Principal Mechanical Engineer in Egremont
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We think you need these skills to ace Principal Mechanical Engineer in Egremont
Some tips for your application 🫡
Show Off Your Technical Expertise:In mechanical engineering, it’s vital to highlight your technical skills and projects. Make sure to include relevant software proficiency (like CAD tools) in your CV. If you've worked on specific engineering projects, detail your key contributions — we want to see how you’ve applied your skills in a practical setting!
Focus on Problem-Solving Examples:Employers in mechanical engineering love to see how you handle challenges. Use your cover letter to share specific instances where you’ve solved a complex problem or improved a design. This will show us you're not just knowledgeable but also capable of applying that knowledge effectively.
Highlight Relevant Certifications:Include any relevant certifications or training that can set you apart from the competition. Whether it's coursework from your degree, a recognised certification, or extra training in new technologies, we love to see candidates who continuously improve their skill set. This tells us you're serious about your career in engineering!
Tailor Your CV for the Role:Don’t forget to customise your CV for weServed and the Principal Mechanical Engineer role specifically. Pull examples from your experience that align with the job description — it shows us you've done your research and are genuinely interested in becoming part of the team. We recommend applying through our website to ensure your application gets to the right people!
How to prepare for a job interview at weServed
✨Brush Up on Your CAD Skills
Since mechanical engineering often involves design processes, be ready to showcase your proficiency in CAD software like SolidWorks or AutoCAD. Bring along a digital portfolio or even some sketches that demonstrate your design capabilities — it’s a great way to show what you can bring to the table at weServed.
✨Prepare for Technical Questions
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As a full-time mechanical engineer, collaboration is key! Be ready to share examples of past team projects or any experiences where you contributed to solving a complex problem with others. Demonstrating your ability to work in a team will resonate well with the interviewers at weServed.
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Since this is a full-time position, your long-term vision is important. Be open about your career aspirations, whether it’s mastering a specific tool or leading projects. This shows that you're committed not just to learning but also to growing with weServed, making you a more appealing candidate.
