Principal Mechanical Engineer

Are you looking to take a lead role delivering complex mechanical engineering solutions within a highly regulated environment?

Do you have extensive experience guiding mechanical design from front‑end studies through to commissioning, particularly on technically demanding projects?

Are you motivated by mentoring engineers while working at the forefront of critical infrastructure programmes?

The Opportunity

This is an exciting chance to join a well‑established engineering consultancy delivering high‑value projects across the UK, supporting programmes from early concept through to construction and operational support.

The Role

This role would suit candidates working in these roles: Principal Mechanical Engineer, Senior Mechanical Engineer, Mechanical Design Lead, Mechanical Engineering Manager, Mechanical Project Engineer, Lead Mechanical Engineer, Mechanical Consultant, Mechanical Systems Engineer. We would also welcome applications from these industries; candidates from nuclear, defence, pharmaceuticals, chemical processing or energy generation sectors are encouraged to apply.

Your duties and responsibilities will be

• Lead and deliver mechanical engineering studies across multiple project phases, from front‑end development through to commissioning and operational support.
• Develop and review mechanical designs, calculations, drawings and specifications, ensuring compliance with safety, quality and regulatory requirements.
• Provide technical input on complex mechanical handling systems, bulk or powder‑based processes, and specialist mechanical equipment in controlled environments.
• Interface effectively with multidisciplinary teams, supply chain partners and internal specialists to ensure robust, coordinated solutions.
• Support and mentor junior engineers, contributing to technical assurance and continuous improvement within the team.

You will have the following qualifications and experience

• Degree qualified in Mechanical Engineering or a closely related discipline.
• Significant post‑graduate experience delivering mechanical engineering design within the nuclear sector or another regulated industry.
• Strong knowledge of mechanical design through all lifecycle stages, including design substantiation, supplier document review and site support.
• Background in producing mechanical solutions that consider manufacture, installation, commissioning, operation and eventual decommissioning.
• Eligibility to work in the UK and willingness to achieve the necessary security clearance.

Get in touch now

If you're seeking a new opportunity and think you have the skills and experience we are looking for, then apply now or contact Chris Hill via Linkedin.

Millbank Holdings Ltd is an equal opportunities employer committed to creating an inclusive and diverse workforce. We welcome applications from all suitably qualified individuals, regardless of background, and encourage candidates from underrepresented groups to apply. We are proud to be a member of the Disability Confident Scheme, and we are committed to ensuring an accessible and supportive recruitment process for everyone. If you require any adjustments at any stage, please let us know and we’ll do our best to accommodate.

Millbank operates as both an Employment Agency and an Employment Business.

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