Senior Mechanical Engineer

Job Title: Senior Mechanical Engineer

Location: Whitehaven Cumbria Hybrid Working Arrangements

Compensation:Competitive Salary Benefits

Role Type: Full time / Permanent

Role ID: SF68226

Lead the Engineering That Shapes the Future of Nuclear Decommissioning

At Cavendish Nuclear were working to create a safe and secure world together. If you join us you can play your part as a Senior Mechanical Engineer at either of our Westlakes Science Park Moor Row or Warrington Cheshire sites.

The role

As a Senior Mechanical Engineer youll be a key contributor to one of the UKs major civil nuclear decommissioning programmes. Youll take a leading role within a multidisciplinary engineering team applying advanced technical expertise to develop integrate and enhance complex mechanical systems that directly support the safe deconstruction and futureproofing of nuclear facilities.

Your work will influence highimpact engineering decisions ensuring compliance technical excellence and robust design integrity across the full project lifecycle. Youll also support the development of junior engineers collaborate across functions and help shape bestpractice engineering within one of the most respected nuclear design alliances in the UK.

Day-to-day youll have the following responsibilities:

• Lead the delivery of complex mechanical engineering tasks and provide highquality technical guidance
• Produce and review engineering documentation including calculations drawings models and reports
• Build strong relationships with customers and act as a key technical interface
• Apply relevant procedures codes and standards to ensure safety compliance and technical rigour
• Identify and manage project risks while contributing to safety assessments and continuous improvement initiatives.

This is a fulltime position working 37 hours 5 days per week based at either of our Westlakes Science Park Moor Row or Warrington Cheshire sites.

Essential experience of the Senior Mechanical Engineer:

• Proven experience delivering engineering activities across the full project lifecycle
• Strong track record of producing and reviewing detailed engineering documentation
• Demonstrated ability to work effectively in multidisciplinary teams
• Excellent communication skills with confidence engaging customers and stakeholders.

Qualifications for the Senior Mechanical Engineer:

• 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. Further details are available at United Kingdom Security Vetting: clearance levels - ()

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 is a benefit that 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 days 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.

Cavendish Nuclear

As a leader within the UK nuclear industry Cavendish Nuclear part of Babcock International Group provides a comprehensive range of critical nuclear solutions in clean energy defence and civil new build and decommissioning projects. Together were innovating to make nuclear safer faster and cost-effective across the nuclear energy life cycle. Your career with us could take you anywhere within Babcock International Group from Canada the USA to Japan. Work with us to create a safe and secure world together.

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. Were committed to building an inclusive culture where everyones free to thrive. We are happy to talk about flexible working please ask about alternative patterns of work at interview.

Closing date: 17/02/2026

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