Senior Mechanical Engineer

Assystem is a global leader committed to accelerating the energy transition. With 7,500 employees across 12 countries, we tackle the monumental task of switching to low-carbon energy. Our 55+ years of experience in highly regulated sectors ensure we deliver top-notch engineering, project management, and digital solutions.

 Join the Fusion and Modular Nuclear Business Unit  Reporting to the Balance of Plant Lead, the Senior Mechanical Engineer shall be responsible for developing a fluid system. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the system design.  

Your mission: 

​​​​​​ Lead Fluid System Development: Manage a small team to develop fluid systems.

Review Design Documents: Develop and review Process Flow Diagrams, Piping and Instrumentation Diagrams, Layout Drawings, Component Sizing Calculations, Datasheets, and Specifications.

Conduct Optioneering: Lead and review optioneering studies, Decision Record Files, Design Descriptions, and Requirement Specifications.

Apply Systems Engineering: Develop and review Functional and Design Requirements using Systems Engineering principles.

Integrate System Design: Ensure the fluid system design integrates seamlessly into the wider power plant.

Provide Technical Support: Act as the technical contact for interfaces and stakeholder activities.

Support Design Reviews: Participate in Design Reviews and HAZID/HAZOP studies with multidisciplinary teams.

Liaise on Safety: Collaborate with the safety team on nuclear safety licensing, environmental planning/permitting, and related interface activities.

Ensure Compliance: Adhere to statutory H&S policies, project quality, and safety rules.

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.

Industry Experience: Background in nuclear, thermal power, oil and gas, or other highly regulated sectors.

Fluid Systems: Experienced in fluid system design development.

Design Phases: Proficient in roles covering FEED to detailed design and EPC delivery.

Procurement: Skilled in developing procurement specifications and collaborating with suppliers.

Technical Expertise: Strong technical background in thermal power or similar projects

Communication: Excellent communication skills for engaging with stakeholders.

Project Management: Ability to identify and manage critical interfaces on major projects.

Safety & Standards: Knowledgeable in UK Health and Safety regulations, safety systems, HAZOP, and engineering standards.

Codes & Standards: Familiar with ASME, European, and UK codes and standards.

Systems Engineering: Experience or awareness in Systems Engineering is a plus.

Personal Specification/Attributes:

Results-Oriented: Independent, proactive, and results-focused team player.

Organization: Strong organizational skills, handling confidential nuclear information professionally.

Education: Bachelor's degree or Higher National Diploma in engineering.

Professional Registration: CEng in a relevant discipline or working towards it.

Security Clearance: SC Clearance or ability to achieve it.

Due to the nature of the work, applicants must meet UK security clearance criteria.

Ready to make a difference in the nuclear engineering world? Join us and be a part of the future of nuclear and fusion innovation

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.