Senior Mechanical Engineer

Babcock Mission Critical Services Espa?a SA.; United Kingdom; Hybrid; GBP 100,000 - 125,000; Full time

Job summary

A leading nuclear solutions provider in the UK is hiring a Senior Mechanical Engineer to be part of a major civil nuclear decommissioning programme. This role offers hybrid working arrangements, combining office and onsite duties at key locations such as Bristol and Warrington. The ideal candidate will possess an engineering degree, have proven experience in delivering engineering activities across the project lifecycle, and demonstrate strong communication skills. Competitive salary and a comprehensive benefits package offered.

Benefits

Matched contribution pension scheme

Access to Digital GP and health consultations

Employee share scheme

Holiday Trading

'Be Kind Day' for volunteering

Excellent development opportunities

Qualifications

• Proven experience in engineering activities from concept design to implementation.
• Ability to work effectively in multidisciplinary teams.
• Strong track record of producing detailed engineering documentation.

Responsibilities

• Lead delivery of complex mechanical engineering tasks.
• Collaborate across disciplines to meet project milestones.
• Manage project risks and ensure compliance with procedures.

Skills

Engineering activities

Project lifecycle management

Technical documentation

Effective communication

Education

Engineering degree (or equivalent)

Job description

Senior Mechanical Engineer

Location: Hull, GB, HU13 0GD; Bristol, GB, BS16 1EJ; Preston, GB, PR2 2YB; Leicester, GB, LE8 6LH; Warrington, GB, WA3 6YD.

Onsite or Hybrid: Hybrid

Job Title: Senior Mechanical Engineer

Location: Flexible, UK

Compensation: Competitive Salary + Benefits

Role Type: Full time / Permanent

Role ID: SF67250

At Cavendish Nuclear we're working to create a safe and secure world, together, and if you join us, you can play your part as a Senior Mechanical Engineer at one of our key locations: Bristol, Warrington (Cheshire), Hessle (East Riding of Yorkshire), or Preston (Lancashire).

The role

As a Senior Mechanical Engineer, you'll be a key contributor to a major civil nuclear decommissioning programme. This initiative focuses on the safe dismantling and remediation of legacy nuclear infrastructure, with a strong emphasis on environmental protection, regulatory compliance, and long–term sustainability. You'll work within a multidisciplinary team to develop and integrate complex mechanical systems, applying innovative engineering solutions to support the safe deconstruction and future proofing of nuclear facilities.

Day to day, you'll lead the delivery of complex mechanical engineering tasks, applying deep technical expertise to solve challenging problems, produce and review high quality documentation, and guide junior engineers, while collaborating across disciplines to ensure project milestones are met with precision and integrity.

• Foster collaboration across engineering and cross functional teams to ensure cohesive project delivery and technical alignment.
• Build and maintain strong relationships with customers, providing clear communication and technical insight to support project progress and business development.
• Apply relevant procedures, codes, and standards rigorously to all engineering activities, ensuring compliance and technical excellence.
• Lead the production and review of engineering outputs–including calculations, drawings, models, and reports–while maintaining design integrity throughout the lifecycle.
• Identify and manage project risks, contribute to safety assessments, and support continuous improvement through technical evaluations and process enhancements.

This is a full time, permanent position (37 hours per week) and provides hybrid working arrangements with three days in the office/onsite, based at one of our key locations: Bristol, Warrington (Cheshire), Hessle (East Riding of Yorkshire), or Preston (Lancashire).

Essential experience of the Senior Mechanical Engineer

• Proven experience delivering engineering activities across the full project lifecycle, from concept design through to implementation.
• Demonstrated ability to work effectively within multidisciplinary teams, contributing to complex technical solutions and project outcomes.
• Strong track record of producing and reviewing detailed engineering documentation, including calculations, drawings, and technical reports.
• Excellent communication skills with the ability to engage confidently with stakeholders and customers to resolve technical and delivery challenges.

Qualifications for the Senior Mechanical Engineer

• Engineering degree (or equivalent qualification) in relevant engineering discipline, with significant demonstrable experience.
• 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: 30/12/2025