Stress 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.

Job Description

In this role, you will be working with our experienced Simulation and Assessment team to deliver projects such as Finite Element Analysis (FEA) assessments of components for nuclear components to design codes such as ASME III or RCC-M. This includes planning, delivery and reporting of the projects, and communicating with internal and external stakeholders such as the customer’s technical leads.

This role may include both working within client teams as part of an integrated embedded team, and delivering Assystem projects from one of our offices.

Key Attributes

• Eager to Learn – Grow your expertise through hands‑on projects, mentorship, and exposure to diverse customers and challenges.
• Technically Curious – Apply engineering analysis using tools such as ANSYS, Abaqus FEA, and MathCAD to deliver robust simulation and assessment work.
• Digital-First Mindset – Confident using engineering and collaboration tools including PLM systems, document control platforms, MS Office, and Teams.
• Collaborative & Independent – Thrive in team environments while also taking ownership of tasks and delivering independently when needed.
• Delivery-Driven – Focused on achieving milestones and producing high-quality outputs on time and within budget.
• Commercially Aware – Understand the wider project context, balancing requirements, risk, change, and delivery objectives.
• Organised Communicator – Strong planning, coordination, and communication skills with the ability to manage priorities effectively.
• Clear Technical Writer – Produce concise, accurate, and professional technical reports and documentation.

Why Join the Community of Switchers?

• Over 55 years in nuclear engineering.
• Ranked among the top 3 largest nuclear engineering companies.
• Attractive social benefits, including an engaging Employee Committee and holiday bonuses.
• Ongoing training with numerous career opportunities.
• 70% of our managers are promoted internally!
• Hybrid work: 1-2 days remote per week.

Qualifications

Essential:

• Excellent technical fundamentals – aptitude for calculations, appreciation of structures, mechanics and fluids, an ability to ‘sense-check’ analysis results.
• Hands‑on experience of computer based modelling codes such as Abaqus, Ansys, Nastran, CFD etc.
• Appreciation of code assessments in a safety related industry, for example ASME, RCC-M, KTA or comparable codes from other sectors.
• Engineering Degree (or equivalent).
• Full UK driving license and ability to travel within the UK.

Desirable / preferred:

• Previous experience in similar roles in the nuclear or fusion industry.
• Hands‑on experience of 3D modelling in CAD software such as Autodesk Inventor, Catia or SolidWorks.
• Experience of fluid-modelling such as CFD, or dynamic modelling such as LS-Dyna or Radioss.
• Working towards Chartered Engineer status.

Additional Information

Attributes:

• Excellent communication skills, written and oral
• Strong leadership skills
• Focus on delivering quality output to time and budget
• Act with integrity and instils this in others
• Has an appreciation of wider technical issues beyond own discipline
• Ability to work with a high degree of independence, using their own initiative and self-motivation
• Confident in a multi-party, multi-national environment
• BPSS and SC required
• Ability to travel Assystem offices and customer sites within UK.
• To undertake work packages supporting major UK and international Nuclear Clients.

Due to the nature of work to be undertaken applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance if not already security cleared to a minimum SC level.

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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