Ventilation Engineer

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.

️ Ventilation Engineer – Technical Specialist Support

Provide expert engineering support and investigative expertise for Sellafield’s Ventilation Technical Specialist Group ️⚙️. Maintain high standards of safety, performance, reliability, and documentation across critical ventilation systems — while staying calm, decisive, and effective under pressure.

Key Responsibilities

Deliver technical support for new & existing ventilation systems

Carry out ventilation asset condition & system health inspections

Support ventilation & HEPA filter commissioning across site

✅ Ensure systems are compliant, fit for purpose & meet current standards

Collaborate with Plant & Reliability Engineers to optimise assets

Follow company standards, safety rules & procedures

Provide a professional, customer-focused service

Maintain safety through ongoing training & compliance

Knowledge & Experience

Engineering or maintenance qualification (or equivalent experience)

️ Experience working at height & in confined spaces

SC Security Clearance (or ability to obtain)

Chartered/Incorporated Engineer status — or working towards it

Experience coaching & developing others

Essential Skills ⚙️

️ Strong background in mechanical/ventilation engineering

Experience providing technical support & investigative expertise for industrial or nuclear ventilation systems

‍ Subject Matter Expert (SME) experience for internal & external stakeholders

Skilled in inspections, system performance checks & improving equipment reliability

Confident producing reports & using standard IT/software packages

Desirable Skills ⭐

Ventilation flow measurement & test equipment experience

Ventilation commissioning & proportional balancing knowledge

️ Safe working experience at height & in confined spaces

️ LEV Testing & Reporting (P601)

CSA Training (Level A, B or C)

Whilst we encourage applications from all nationalities, Assystem within the UK are subject to security and export control restrictions due to the nature of work to be undertaken.  

 

These restrictions mean that factors including your nationality, any previous nationalities you have held, and/or your place of birth may limit those roles that you can perform for the organisation. 

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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.