Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Lead mechanical design for major infrastructure projects in defence and nuclear sectors.
- Company: Top engineering firm known for innovative infrastructure solutions.
- Benefits: Competitive pay, flexible working, and opportunities for professional growth.
- Why this job: Make a real impact on critical projects while advancing your engineering career.
- Qualifications: Degree in Mechanical Engineering and leadership experience in large projects.
- Other info: Join a dynamic team with a focus on sustainability and innovation.
The predicted salary is between 48000 - 72000 £ per year.
Location: Cumbria
Region: Cumbria
Sector: Defence, MOD & Aerospace
Category: Scantec Engineering
Job Type: Contract
Salary: Competitive rate - outside of scope of IR35
Job Reference: JOB-90293
Published: 16-03-2026
Duration: 12 month contract
Expiry Date: 13-04-2026
Country: United Kingdom
Location: Manchester/Risley with regular travel to Cumbria
Security: BPSS required (must be eligible for SC clearance)
Overview
We are working with a leading engineering and construction company that specialises in delivering complex infrastructure projects across sectors including energy, water, transportation, defence, and nuclear. The organisation provides integrated services spanning consulting, engineering design, project management, and construction delivery, working closely with government bodies, regulated utilities, and major private sector clients. The organisation is seeking a Mechanical Responsible Engineer to support the delivery of a major long-term utilities infrastructure programme at a nuclear-licensed site in Cumbria. The role will involve leading mechanical design activities across a range of site utility systems from concept through to commissioning.
Key Responsibilities
- Provide technical leadership and act as the Mechanical Responsible Engineer across the programme.
- Manage internal and external mechanical design teams and consultants.
- Ensure designs are delivered safely, on time, within budget, and in compliance with regulatory standards.
- Review and technically assure mechanical design deliverables and supplier designs.
- Implement and manage the Design Management Plan and engineering processes.
- Monitor design progress, risks, and technical performance.
- Manage and control mechanical design change.
- Work closely with project, procurement, and construction teams to ensure constructable design solutions.
- Embed sustainability and carbon reduction principles into design solutions.
Utilities Scope
- Projects include upgrades and refurbishment across:
- Steam systems (LP & HP)
- Water systems (wastewater, raw, domestic & demineralised)
- Compressed air systems
- Chemical storage and distribution
- Sewage treatment facilities
- Utility distribution networks and tanker off-load facilities
Skills & Experience
- Strong background in mechanical engineering leadership within large infrastructure programmes.
- Ability to review and manage complex mechanical design deliverables.
- Good knowledge of UK engineering legislation and standards.
- Experience in regulated sectors (nuclear, energy, water, industrial) beneficial.
Qualifications
- Degree in Mechanical Engineering or equivalent experience.
- Chartered Engineer (IMechE, CIBSE or similar).
- CSCS Safety Passport.
- BPSS clearance or ability to obtain SC clearance.
Principal Mechanical Responsible Engineer in London employer: Scantec Personnel Limited
Contact Detail:
Scantec Personnel Limited Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Principal Mechanical Responsible Engineer in London
✨Network Like a Pro
Get out there and connect with people in the industry! Attend events, join online forums, and don’t be shy about reaching out on LinkedIn. We all know that sometimes it’s not just what you know, but who you know that can land you that Principal Mechanical Responsible Engineer role.
✨Show Off Your Skills
When you get the chance to chat with potential employers, make sure to highlight your experience in managing complex mechanical design deliverables. We want to see you confidently discuss your background in regulated sectors like nuclear or energy, as this will set you apart from the crowd.
✨Tailor Your Approach
Before any interview, do your homework on the company and the specific projects they’re involved in. We recommend preparing examples of how you’ve successfully led mechanical design activities in the past, especially in large infrastructure programmes. This shows you’re not just a fit for the role, but you’re genuinely interested in their work.
✨Apply Through Us!
Don’t forget to check out our website for the latest job openings. Applying through StudySmarter gives you an edge, as we’re always looking to connect talented individuals with leading companies in the defence and aerospace sectors. Let’s get you that contract!
We think you need these skills to ace Principal Mechanical Responsible Engineer in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Principal Mechanical Responsible Engineer role. Highlight your experience in mechanical engineering leadership and any relevant projects you've worked on, especially in regulated sectors like nuclear or energy.
Craft a Compelling Cover Letter: Your cover letter should tell us why you're the perfect fit for this role. Mention specific skills that align with the job description, such as your ability to manage design teams and ensure compliance with regulatory standards.
Showcase Your Technical Skills: Don’t forget to showcase your technical skills in your application. We want to see your knowledge of UK engineering legislation and standards, as well as your experience with complex mechanical design deliverables.
Apply Through Our Website: For the best chance of success, make sure you apply through our website. This way, we can easily track your application and get back to you quickly. Good luck!
How to prepare for a job interview at Scantec Personnel Limited
✨Know Your Stuff
Make sure you brush up on your mechanical engineering knowledge, especially in areas relevant to the role like steam systems and water systems. Familiarise yourself with UK engineering legislation and standards, as this will show that you're serious about the position.
✨Showcase Your Leadership Skills
As a Principal Mechanical Responsible Engineer, you'll need to demonstrate your ability to lead teams effectively. Prepare examples from your past experiences where you've successfully managed design teams or projects, highlighting how you ensured safety and compliance.
✨Understand the Company’s Projects
Research the organisation's previous and current projects, particularly in the defence and nuclear sectors. Being able to discuss specific projects during your interview will show your genuine interest and help you connect your experience to their needs.
✨Prepare for Technical Questions
Expect to face technical questions related to mechanical design and project management. Practice articulating your thought process when tackling complex design challenges, and be ready to discuss how you would implement sustainability principles in your designs.