Senior Mechanical Engineer

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

Job summary

Assystem UK Ltd is seeking a Senior Mechanical Engineer to join the Fusion and Modular Nuclear Business Unit. You will lead Turbine Island design activities, collaborate with multidisciplinary teams and the supply chain, and ensure supplier deliverables meet requirements.

The role requires a strong background in thermal power, experience from FEED to EPC delivery, and knowledge of UK safety standards. You will engage with internal and external stakeholders and support design reviews and

Qualifications

• Industry experience in nuclear, thermal power, oil and gas, or other regulated sectors.
• Experience with steam turbines, condensers, feedwater heaters, pumps, and piping systems.
• Thermal power background from FEED to detailed design and EPC delivery.
• Procurement specifications development and supplier collaboration.
• Extensive technical experience in thermal power or similar projects.
• Excellent at engaging with internal and external stakeholders.
• Capable of identifying and managing critical interfaces on major projects.
• Knowledge of UK H&S regulations, safety systems, HAZOP, and engineering standards.

Responsibilities

• Create and review Process Flow Diagrams, P&ID, Layout Drawings, Sizing Calculations, Datasheets, and Specifications.
• Conduct optioneering; lead and review Decision Records and Design Documentation.
• Apply Systems Engineering to develop requirements.
• Integrate Turbine Island design into the broader power plant.
• Provide technical support; act as the interface with Turbine Island stakeholders.
• Support design reviews and HAZID/HAZOP studies with multidisciplinary teams.
• Liaise on safety and regulatory licensing, environmental planning and permitting.
• Adhere to statutory H&S policies, project quality, and QS System.

Skills

Industry experience

Thermal power

Procurement

Technical proficiency

Communication

Project management

Safety knowledge

Codes & standards

Systems engineering

Education

Bachelor's degree or HND in engineering

Job description

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.

Key Responsibilities

• Create and review Process Flow Diagrams, Piping and Instrumentation Diagrams, Layout Drawings, 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 Turbine Island: Seamlessly integrate Turbine Island design into the wider power plant.
• Provide Technical Support: Serve as the technical contact for Turbine Island interfaces and stakeholder activities.
• Support Design Reviews: Participate in Design Reviews and HAZID/HAZOP studies with multidisciplinary teams.
• Liaise on Safety: Work with the safety team on nuclear safety licensing, environmental planning/permitting, and related activities.
• Ensure Compliance: Adhere to statutory H&S policies, project quality, and the Quality Management System.

Qualifications

Industry Experience: Previous work in nuclear, thermal power, oil and gas, or other regulated sectors. Experienced with steam turbines, condensers, feedwater heaters, pumps, and piping systems.

Thermal Power Expertise: Strong background in thermal power systems, with experience from FEED to detailed design and EPC delivery.

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

Technical Proficiency: Extensive technical experience in thermal power or similar projects.

Communication: Excellent at engaging with internal and external stakeholders.

Project Management: Capable of identifying and managing critical interfaces on major projects.

Safety Knowledge: Proficient in UK Health and Safety regulations, safety systems, HAZOP, and engineering standards.

Codes & Standards: Knowledgeable in ASME, European, and UK codes and standards.

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

Personal Attributes

Results-Oriented: Independent, proactive, and team-focused with strong organizational skills.

Confidentiality: Professional in handling sensitive nuclear information in line with export control obligations.

Educational Background

Bachelor's degree or Higher National Diploma in engineering.

Professional Registration

CEng 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.

EEO Statement

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.

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.

Summary

Type: Full-timeFunction: EngineeringExperience level: Mid-Senior LevelIndustry: Management Consulting

Job Description

Job Description Join the Fusion and Modular Nuclear Business Unit! Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. Your mission:Intelligent Customer Role: Ensure supplier deliverables meet requirements by critically assessing designs.Develop & Review Designs.