CS&A Principal Engineer

Assystem -
Warrington

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Job details

Qualifications

Civil engineering
Driving Licence
Driving
Construction
Leadership
Communication skills

Full job description

Nuclear

Contracting /

Warrington

United Kingdom

04/06/26

On site

ABOUT ASSYSTEM

Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements.

Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.

JOB DESCRIPTION

Project Specific Requirements

Report to CSA RE on a daily basis
Provide leadership, guidance, and support to the JV CSA design and site engineering team
Attend the Warrington office a minimum of 3 days per week and visit the Sellafield site regularly (ideally fortnightly) to confidently engage with the multi-discipline JV construction team and subcontractors
Check and comment on CSA JV design submissions during development, including site modifications; complete NFR documents and submit to SL Doc Control
✅ Review, check, accept or reject design submissions; sign and submit PMACD to SL Doc Control
Review, check, accept or reject TQ/PP submissions
Review the progress of all structural detail design drawings, calculations, and documents through to ‘As Built’ status by the JV CS&A designers
️ Demonstrate general understanding of service supports and blockwork wall substantiation
Possess a general understanding of fire strategy arrangements (preferred), including fire-rated service hanger supports; attend meetings with Fire Consultants to review conventional and nuclear fire issues
Interface with the multi-discipline design team on project issues; liaise with SL Capability as required to substantiate site issues encountered during construction
️ Provide support to Safety Case work, including DJRs

External Works

Demonstrate good design understanding of external works, including concrete slabs and surface water drainage standard details
Review and comment on all interfaces between the external works and the building external envelope as construction progresses
Engage regularly with the JV construction team and supply chain on site; attend weekly meetings as required

️ Attend weekly risk review meetings and support EWNs

Site Visits

Visit site weekly (minimum bi-weekly) for the day
Liaise with the site construction team and conduct or participate in site walkdowns to oversee, discuss, and resolve CS&A-related construction issues
Liaise and interface with SL Site Utilities and Infrastructure Capability to secure buy-in to contractor proposals prior to construction where applicable

MY PROFILE

Qualifications and Experience

Civil / Structural Engineering Degree, or equivalent

Chartered Engineer (CEng) – MICE or MIStructE

️ Demonstrable expertise in major project areas relevant to the engineering discipline, with a proven track record of successfully applying specialist knowledge and skills

Ability to provide strategic guidance based on experience across a portfolio of projects, helping to inform and direct programmes

Proven leadership capability within an engineering function

️ Experience working within the Nuclear Sector, including new build and decommissioning projects, in roles reliant upon professional engineering expertise and judgement

Strong understanding of design principles and the ability to apply them effectively

Working knowledge of British Standards

️ Excellent written and verbal communication skills

Full UK driving licence (or equivalent permitting driving in the UK)

Able to meet the requirements for UK security clearance

**Security clearance**

This role requires the successful candidate to hold a minimum of a BPSS clearance without any caveats to that clearance.

NOTICE TO CANDIDATES ON RECRUITMENT FRAUD – We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

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