Senior EC&I Commissioning Engineer (Temporary – 6.5 Months)

⚡️💡 About Assystem

At Assystem, our mission is to accelerate the energy transition worldwide. With over 55 years of expertise in highly regulated sectors, our 8,000 Switchers globally deliver cutting-edge engineering and project management solutions. Join us and be part of one of the top three nuclear engineering companies in the world!

🤝 Why Join the Community of Switchers?

As a member of Assystem, you'll be part of a team driving the low-carbon energy future. We’re ranked second globally in nuclear engineering, offering you the chance to work on world-class projects like Hinkley Point C. Together, we’ll innovate and shape tomorrow’s energy solutions.

Job Summary

The Senior Commissioning Dedicated Instrumentation & Controls (I&C) Lead is responsible for leading and coordinating defined I&C commissioning scopes at the client's project, ensuring systems are commissioned safely, compliantly, and in line with nuclear quality, safety, and regulatory requirements.

This is a temporary cover role for approximately 6.5 months, providing leadership continuity during a critical phase of commissioning and start-up. The role acts as the focal point for I&C commissioning across multiple workstreams, ensuring alignment with the project's commissioning strategy, nuclear safety culture, and UK regulatory expectations.

Scope of Work

Main Scope (Direct Leadership)

• DMIC I&C Commissioning – overall I&C commissioning lead for the DMIC scope
• I&C support for Cranes Commissioning – support for commissioning coordination, testing, and handover of crane systems focusing on I&C scope

Mainstreams (Oversight & Integration)

The role provides leadership oversight and integration for the following three I&C mainstreams, each managed by a dedicated scope manager:

1. I&C representative for Milestone journey to Demin water Plant (covering DMIC scope of Demin Water Plant)
2. I&C representative for Milestone journey to CETP (coordinating I&C activities)
3. Lead preparation and commissioning for Hydrogen Detection System
4. Lead preparation and commissioning for Fire Detection System
5. Supporting delivery of TAE milestone (temporary I&C systems delivery)
6. Managing three direct reports:
   1. Commissioning engineer for HVAC I&C scope
   2. Commissioning engineer for Turbine I&C scope
   3. Commissioning engineer for Fire detection and Hydrogen detection scopes

Responsibilities include:

• Ensuring interface alignment between all I&C scopes and the wider HPC commissioning programme
• Maintaining consistent commissioning methodologies, documentation, and safety standards
• Chairing one weekly coordination meeting with each of the three mainstream scope senior commissioning engineers to review progress, risks, interfaces, and readiness

Key Responsibilities

Commissioning Leadership

• Lead I&C commissioning activities for DMIC contracts (various cranes, Demin water plant, fire detection, hydrogen detection) in accordance with the project commissioning processes
• Plan and sequence commissioning activities to support system handover, energisation, and start-up milestones
• Ensure readiness for loop checks, functional testing, cause & effect testing, and integrated system testing
• Interface closely with construction, electrical, mechanical, and operations teams

Technical Oversight

• Review I&C commissioning procedures, test packs, and vendor documentation for nuclear compliance
• Provide technical leadership during I&C testing, fault finding, and issue resolution.
• Review of commissioning results following site acceptance test activities for Cranes, hydrogen detection system, etc.
• Ensure effective interface management between systems.
• Support DCS, PLC, SIS, and field instrumentation commissioning activities.

Nuclear Safety & Regulatory Compliance

• Ensure all commissioning activities are executed in line with nuclear safety culture, project quality arrangements, and site procedures
• Comply with UK regulatory requirements, including ONR expectations and client governance
• Ensure strict adherence to permit-to-work, LOTO, configuration control, and change management processes
• Participate in safety reviews, readiness reviews, and regulatory inspections as required

Coordination & Communication

• Act as the primary I&C commissioning interface for the assigned scopes
• Lead weekly/bi-weekly coordination meetings with for Demin water plant (I&C scope), CETP (I&C scope) HVAC, hydrogen fire detection, and turbine scope managers
• Provide clear reporting on progress, risks, constraints, and commissioning readiness
• Support operator familiarisation and handover activities

Documentation & Handover

• Ensure completeness and quality of commissioning records, test evidence, and as-built documentation
• Manage I&C punch lists through closure in accordance with HPC requirements
• Support final system acceptance and turnover to Operations and Maintenance

Qualifications & Experience

• Degree in Instrumentation, Electrical, Control Systems Engineering, or a related discipline
• 10+ years’ experience in I&C engineering and commissioning, preferably on large, complex or regulated projects
• Previous experience in high-hazard regulated environments strongly preferred
• Proven experience leading multi-scope I&C commissioning teams
• Strong knowledge of DCS, PLC, SIS, and field instrumentation systems

Skills & Competencies

• Strong leadership and coordination across multiple commissioning workstreams
• Deep understanding of nuclear safety culture and quality expectations
• Excellent interface management and communication skills
• High attention to detail and strong documentation discipline
• Ability to integrate rapidly into an established HPC project team within a fixed-term assignment

Working Conditions

• This is a full-time position based at client premises, involving a combination of site-based activities and office work in locations including Bridgwater and Bristol.
• Temporary assignment of approximately 6.5 months

As this is a front-line site delivery role, there is a necessity to work flexibility working under the time pressure of the schedule in order to unblock technical issues to allow continuity of work by the installation teams.

What We Offer

• Competitive salary and benefits package.
• Opportunity to work on one of Europe’s largest nuclear construction projects.
• Professional development and training opportunities.
• Collaborative and inclusive work environment.

Join Assystem and contribute to delivering sustainable and innovative engineering solutions for the Hinkley Point C project.

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.