Principal Mechanical Engineer

# Principal Mechanical Engineer Location Warrington , Cheshire, North West, England Salary Dependent  on experience - inside IR35

Contract Type Permanent Work  Type Full Time Posted on15 Oct 2026

Join a multidisciplinary engineering consultancy delivering a major nuclear infrastructure programme in Warrington. This role is ideal for a seasoned mechanical engineer with expertise in mechanical handling systems who wants to take a technical lead position on a high-profile, confidential nuclear project. You’ll be part of a team driving design excellence, innovation, and compliance in a complex and regulated environment.

** Location and Working Pattern
** Warrington, with hybrid working available. Some on-site engagement may be required to support project delivery and client interactions.

** Client Overview
** Our client is a trusted engineering consultancy delivering large-scale design and engineering programmes across the nuclear sector. They work at the forefront of critical infrastructure projects that contribute to national capability and safety.

** Responsibilities*
* * Lead the design and specification of bespoke mechanical handling equipment and systems.
* Provide technical leadership and mentorship to engineers and designers across the project team.
* Produce and review calculations, specifications, and engineering reports.
* Develop and maintain design requirements, ensuring full verification and traceability.
* Support design reviews, hazard studies, and regulatory compliance activities.
* Conduct site surveys and assessments to inform technical solutions.
* Manage interfaces with clients, stakeholders, and supply chain partners.
* Support installation, commissioning, and testing where required.
* Ensure all design work meets relevant nuclear, mechanical, and safety standards.
** Must‐have Requirements*
* * Strong experience working on Sellafield or comparable nuclear projects.
* Proven background in mechanical handling engineering in regulated environments.
* Expertise in designing, specifying, and delivering bespoke mechanical handling systems.
* Demonstrable leadership experience managing engineering delivery.
* Working knowledge of LOLER, PUWER, CDM Regulations and the Supply of Machinery (Safety) Regulations.
* Experience producing and reviewing technical documentation and engineering assessments.
* Degree in Mechanical Engineering (or equivalent).
* Chartered Engineer status (or working towards it).
** Nice‐to‐have Skills*
* * Experience in nuclear decommissioning and waste handling projects.
* Familiarity with Sellafield processes and design standards.
* Involvement in equipment trials, testing, and commissioning.
* Track record of mentoring and developing junior engineers.
** Due to the nature of this role being on a national security facility, we can only accommodate applications from UK Nationals.*
* ** Apply Now
** If this Principal Mechanical Engineer position matches your skills and experience, apply today or send your CV to our recruitment team.