Senior Mechanical Designer

Location: Warrington, Cheshire or Preston, Lancashire + Hybrid Working Arrangements

Compensation: Competitive Salary + Benefits

Role Type: Full time / Permanent

Shape the future of nuclear engineering with innovative, industry leading design.

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 Senior Mechanical Designer at our Warrington or Preston sites.

As a Senior Mechanical Designer, you'll take on a role that's truly out of the ordinary. You'll be a key point of contact for engineering colleagues and stakeholders throughout the design lifecycle, contributing to reviews, resolving technical challenges and helping ensure robust, compliant design outcomes.

Day-to-day, you'll be:

• Allocating design tasks, supporting and guiding a team of Designers, and ensuring high quality discipline outputs.
• Leading inter disciplinary coordination to meet regulatory and company standards.
• Preparing and checking design drawings, ensuring compliance with ISO standards and project requirements.
• Advising on the best methods, tools and techniques for design tasks and providing technical support to the design team.
• Liaising with customers to support relationship development, resolve technical issues and ensure progress transparency.

This role is full time working 37 hours per week and is based at either our Warrington, Cheshire site or Preston, Lancashire, site and includes hybrid working arrangements.

• Experience working in a detailed design environment.
• Strong knowledge of CAD tools and engineering drawing practices.
• Demonstrable experience providing technical leadership within a multi discipline design environment.
• Incorporated Engineer status (desirable).

HNC/HND (minimum) in a relevant discipline or equivalent qualification.

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 - GOV.UK () .

• 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 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.

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, we're 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'. 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: 18/03/2026