Mechanical Construction Engineer

️ About Assystem

Assystem is a global leader in engineering, digital, and project management services, driving the UK’s energy transition since 1996. With 7,500 Switchers worldwide, we combine deep engineering expertise with digital innovation to deliver complex, low-carbon infrastructure. In the UK, we’re proud to support landmark nuclear projects like Hinkley Point C, Sizewell C, and emerging SMR programmes.

Why Join the Community of Switchers?

Join one of the three largest nuclear engineering companies in the world. Here, you’ll work on world‑class energy‑transition missions, collaborating with top teams delivering HinkleyPointC, SizewellC and SMRs. Become part of an elite global community, driving innovation and excellence every day.

Job Description

The Job Mission
This role provides on-site mechanical construction surveillance across a range of key nuclear infrastructure systems. It focuses on ensuring quality compliance and construction standards are consistently upheld. You’ll be out on site 90% of the time with a clear focus on reporting, oversight and assurance.

• Monitor mechanical construction work to ensure contractor compliance with technical documentation
• Identify and escalate non-conformance items and deviations through formal processes
• Contribute QA/QC surveillance findings to construction and quality teams
• Support mitigation actions to uphold safety and quality during active works
• Ensure design decisions are referred through formal approval channels, not made in-field
• Maintain strong stakeholder coordination and communication across site teams
• Support performance reviews against Quality Control Plans and site KPIs
• Help ensure records, inspections and standards are documented before works are covered

My profile

Essential Skills and Qualifications

• Mechanical Engineering qualification or equivalent vocational training
• 3+ years’ experience in QA/QC or mechanical installation surveillance
• Knowledge of mechanical scopes like pipework, HVAC, rotating/static equipment
• Familiarity with BTS, BST, ISO9001 or GQAS quality standards
• Skilled in reporting and using Microsoft Outlook, Excel, SharePoint, Teams
• Proven ability to question, spot detail, and uphold high standards
• Strong written communication and stakeholder liaison skills
• Comfortable with 90% site presence in a quality assurance role
• Experience with large mechanical installations or erection of heavy equipment
• Prior role in a large-scale construction project environment
• Working understanding of CDM obligations and approval processes
• Knowledge of FME, joint integrity or alignment inspection checks
• Experience supporting Quality Control Plans and inspection documentation

Ready to shape the future? Join your future team on-site at one of the most ambitious nuclear power projects in Europe. Be part of a collaborative mission to uphold the highest construction and quality standards.

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.

Are you a prospective or recent graduate?

Assystem offers you the opportunity to join our Switch to Grow UK Graduate Scheme, where you’ll gain hands on experience in engineering, digital services, and project management by working on some of the world’s most critical energy projects.

Be part of the challenge of the century; accelerating the switch to low carbon energy!

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