Principal Electrical Engineer (Mechanical bias)

Assystem is an international company with one mission: accelerate the energy transition around the world.

Every day, our 6,500 switchers located in 12 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy.

We are a collective committed to the actors who are making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition.

Drawing on more than 55 years' experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked third in the world for nuclear engineering.

To ensure a viable, efficient, and reliable energy future for all.

Job Description

Job Description

:

The Electrical and Mechanical Specialist role is to work in the clients Engineering team supporting the development of operational requirements associated with the Site and to support the technical assurance for the design and implementation of both Onshore and Marine systems for a key project.

The Scope of work is the replacement/refurbishment of existing structures, plant and equipment to comply with modern standards and regulations.

About the Role

We’re looking for a skilled Mechanical & Electrical Specialist to join our Engineering team, supporting a major infrastructure programme focused on the refurbishment and replacement of critical site systems.

You’ll play a key role in shaping operational requirements and providing technical assurance across both onshore and marine systems , ensuring all works meet modern standards, safety regulations, and project objectives.

️ What You’ll Be Doing

• Provide expert M&E input to support site operations and safety case integration
• Offer technical guidance to engineers, project teams, and supply chain partners
• Support Project Managers in overseeing consultants and contractors
• Contribute to project optioneering and early-stage solution development
• Develop work scopes and define functional and user requirements
• Review and approve technical drawings, designs, and documentation
• Respond to engineering queries and resolve technical challenges
• Oversee detailed design activities in line with client standards
• Assess contractor submissions (method statements, risk assessments, etc.)
• Supervise construction/deconstruction activities to ensure design compliance
• Engage with stakeholders throughout the project lifecycle
• Ensure compliance with Health, Safety, Environmental, Security & Quality standards ⚠️
• Support commissioning and decommissioning activities
• Deliver technical presentations and contribute to training initiatives
• Represent the organisation at stakeholder and supply chain meetings
• Support project close-out and handover activities

What We’re Looking For

• Strong Mechanical & Electrical engineering background
• Experience in complex infrastructure, defence, or marine environments (desirable)
• Ability to manage stakeholders and provide technical leadership
• Solid understanding of design assurance and project delivery processes
• Strong communication and problem-solving skills

Qualifications

✅ Essential Skills & Experience

• Minimum HNC in Electrical Engineering (or equivalent)
• ⚡ Strong knowledge of HV/LV power generation and distribution systems , ideally within nuclear or defence environments
• ️ Experience with Control & Instrumentation systems , including SCADA monitoring
• Proven experience in the design and assessment of electrical systems and equipment
• Solid understanding of safe systems of work for electrical systems in regulated environments
• Working knowledge of Mechanical Engineering principles
• ️ Experience in design and assessment of mechanical systems , including:
  • Static equipment
  • Pipework
  • Tanks and vessels
• Familiarity with British Standards, Eurocodes , and relevant engineering codes
• ☢️ Knowledge of UK nuclear regulations and industry best practice
• Strong theoretical and practical experience across:
  • Concept design
  • Detailed design
  • Construction phases
• Background in heavy industrial and/or mechanical engineering systems
• Experience within the UK nuclear sector (energy or defence), especially:
  • Safety-related structures
  • Systems and components
• Experience delivering project engineering work packages , including site integration in regulated environments

Desirable Skills & Experience

• Ability to work independently and collaboratively within a team
• ⚖️ Strong understanding of compliance with legislation and industry standards
• Experience producing and reviewing technical documentation , such as:
• ️ Confident in stakeholder engagement and communication
• Basic Health & Safety training for site-based work
• Chartered Engineer status (or working towards)
• ☢️ Understanding of nuclear safety cases
• Experience with nuclear safety committees / authorisation groups

Additional Information

Why join the community of Switchers?:

 The Group is currently ranked Third in the world for nuclear engineering.

A dynamic career management policy to enable our employees to progress through our five business lines: operations, project, technical, sales and support functions

Provide opportunities to work on exciting, global projects

Access to an employee assistance programme with free mindfulness, health, wellbeing resources and a confidential support line available 24/7 via phone or text

Discount vouchers for days out and restaurants, eye test and glasses vouchers, cycle to work scheme, free flu jabs

Staff or umbrella contract role

SC Clearance to start

Sole UK nationals only

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.