Senior Mechanical Engineer

Assystem UK Ltd; Bristol; Hybrid; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Hybrid work: 1-2 days remote per week

Job summary

Assystem UK Ltd in the United Kingdom is seeking a Senior Mechanical Engineer to lead fluid system development within the Fusion and Modular Nuclear Business Unit. You will work with multidisciplinary teams and the supply chain to deliver safe, compliant system designs.

The role covers FEED to detailed design and EPC delivery, with emphasis on interfacing, procurement specs, and safety standards. A strong background in nuclear or regulated sectors and a UK security clearance are preferred.

Qualifications

• Industry experience in nuclear, thermal power, oil and gas, or other highly regulated sectors.
• Fluid system design development.
• Roles covering FEED to detailed design and EPC delivery.
• Procurement specifications development and supplier collaboration.
• Strong technical background in thermal power or similar projects.
• Excellent communication with stakeholders.
• Identify and manage critical interfaces on major projects.
• Knowledge of UK Health and Safety regulations, safety systems, HAZOP, and standards.
• Familiar with ASME, European, and UK codes and standards.
• Systems Engineering awareness is a plus.
• Results-oriented and independent team player.
• Strong organizational skills and handling confidential nuclear information.

Responsibilities

• Instrumentation diagrams, layout drawings, component sizing calculations, datasheets, and specifications.
• Conduct optioneering and review design documentation and requirements.
• Apply systems engineering to develop functional and design requirements.
• Integrate fluid system design into the wider power plant.
• Provide technical support as interface lead with stakeholders.
• Support design reviews and HAZID/HAZOP studies with multidisciplinary teams.
• Liaise on safety with the safety team for licensing and environmental interfaces.
• Ensure compliance with UK H&S policies and project quality.

Skills

Industry experience

Fluid systems

Design phases

Procurement

Technical expertise

Communication

Project management

Safety & standards

Codes & standards

Systems engineering

Results-oriented

Organization

Security clearance

Education

Bachelor's degree or Higher National Diploma in engineering

CEng registration (or working towards)

Job description

Responsibilities

• 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.

Qualifications

• 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.

Additional Information

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

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.

Summary

Type: Full-time

Function: Engineering

Experience level: Mid-Senior Level

Industry: Management Consulting

Company Description

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

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