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Principal Mechanical Engineer; Building Services

Job in Scotland, Kinross, Perth and Kinross, KY13, Scotland, UK
Listing for: Assystem, Switch On
Full Time position
Listed on 2026-02-23
Job specializations:
  • Engineering
    Mechanical Engineer, Energy Engineer
Job Description & How to Apply Below
Position: Principal Mechanical Engineer (Building Services)
Location: Scotland

Company Description

The UK’s nuclear sector has entered a renaissance, with Nuclear Energy now a vital component as the country moves towards a target of Net Zero.

Assystem provides critical support to this mission, accelerating the decommissioning and remediation of our legacy assets with a view to enabling a swifter energy transition, in parallel overcoming some of the largest engineering and environmental challenges of our generation.

As a Global top 3 independent nuclear engineering organisation, Assystem is active across the full decommissioning lifecycle. In the UK, we work across the Civil and Defence nuclear estates, pioneering agile and fit-for purpose, customer-focused solutions, drawing on our established pedigree for delivery engineering excellence. Assystem have a proud heritage gained over decades both in the UK and overseas, (delivering, supporting, managing) some of the most complex engineering projects in decommissioning, repurposing legacy assets and key new build projects such as Hinkley Point

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Job Description

Summary of the Role

The role involves working as part of a multi-disciplinary engineering team within the Approving Authority. The primary purpose of the role is to directly support current operations and future programmes.

The team consists of Mechanical, Civil, Building Services and Electrical Engineers and are responsible for the authorship, development, assessment, and maintenance of engineering design substantiation for Clyde Nuclear Facilities.

TASKS

Authoring, development, assessment, maintenance and management of the suite of Clyde Nuclear Infrastructure Design Substantiation documents.
Authoring, development, assessment, maintenance and management of design changes/concessions
Presentation of Clyde Design substantiations, to Clyde ‘Due Process’ nuclear safety committees
Production and development of Examination, Inspection, Maintenance & Testing (EIMT) Schedule, operating procedures and results to satisfy design requirements and safety case through life
Producing Periodic Review of Safety reports
Providing advice and direction to internal and external stakeholders
Production of Independent Technical Review (ITA)/Independent Peer Review (IPR)
Use a combination of general and specialist engineering knowledge and understanding to apply existing and emerging technology
Apply appropriate theoretical and practical methods to design, develop, manufacture, construct, commission, operate, maintain, decommission and re-cycle engineering processes, systems, services and products in a nuclear/high risk environment
Producing robust technical justification to allow for relevant mechanical/structural design modifications to be authorised within a high hazard industry

Qualifications

EXPERIENCE

Essential:

5 Years Mechanical/Building Services design experience

Experience of producing robust technical justification to allow for relevant design modifications to be authorised
Knowledge of key legislation and Standards applicable to the built environment and building services design.
Familiarity with recognised industry technical guidance such as CIBSE guides and ASHRAE standards.
Experience working on multi-discipline projects providing mechanical/BS engineering input

Desirable:

Experience in a commissioning management role with familiarity of CIBSE commissioning codes and BSRIA commissioning guides.
Experience applying appropriate theoretical and practical methods to design, develop, manufacture, construct, commission, operate, maintain, decommission and re-cycle engineering processes, systems, services and products in a nuclear or similar high hazard industry
Ideal candidates would already have experience within Clyde or a similar high-risk environment
Familiarity with safety case development techniques e.g. HAZID/HAZOP studies.

QUALIFICATIONS & TRAINING

Essential:

HNC/HND or equivalent in Mechanical Engineering or Building Services or similar plus demonstrable experience in the discipline.

Desirable:

BEng Mechanical Engineering or Building Services
Membership of IMechE or CIBSE
CEng
Safety case related training or experience

Additional Information

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