Senior EC&I Commissioning Engineer

Our Vacancy# Senior EC&I Commissioning Engineer
* Nuclear* Permanent /
* Bridgwater* United Kingdom
* 21/05/26
* On site
* Share|
** About Assystem
** 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 nuclear 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.|You will join your future team supporting one of the UK's most significant nuclear construction programmes. This is a chance to work at the sharp end of commissioning, where safety, precision, and engineering judgement genuinely matter.

Alongside meaningful project work, you will benefit from:* | Hybrid Working Opportunity* | Flexible working hours* | Market Leading Pension scheme (8% company contribution / 4% personal contribution)* | Professional fees covered fully* | Employee referral scheme* | Competitive Sick Pay - Support when you need it* | Income Protection & 3x Salary Death-in-Service Cover* | 24/7 Employee Support Line - Mental health, financial & legal help*...

and more##

Job Description | This is role is based in Bridgwater, so we can consider candidates within commutable distance, or those open to relocating with support. You will support the instrumentation and controls commissioning delivery across complex plant systems. You will coordinate testing, integration, readiness and handover activities.
* Your role will include:
** Lead I&C commissioning activities across multiple integrated plant systems.
* Plan commissioning sequences supporting energisation and handover milestones.
* Oversee loop checks, functional testing and integrated commissioning.
* Review commissioning procedures, vendor documents and compliance requirements.
* Coordinate with construction, operations, mechanical and electrical teams.
* Ensure activities follow nuclear safety and project procedures.
* Support DCS, PLC, SIS and field instrumentation commissioning.
* Lead technical fault finding and issue resolution activities.
* Report commissioning progress, readiness, risks and project constraints.
* Manage commissioning records, punch lists and system handover.|
** Nuclear experience is not essential, but is of course welcome.
** If you have worked within a highly regulated environment, your skills and approach are highly transferable and of strong interest to us.

We also recognise that the perfect candidate rarely exists. If you feel you meet around 80% of the criteria and are motivated to develop further, we would strongly encourage you to apply
* I&C commissioning experience in complex industrial environments.
* Strong DCS, PLC, SIS or instrumentation knowledge.
* Experience leading commissioning teams or technical scopes.
* Understanding of testing, handover and operational readiness.
* Knowledge of permit-to-work and isolation processes.
* Comfortable managing priorities across concurrent work streams.
* Able to review procedures and technical documentation.
* Strong stakeholder coordination across multidisciplinary teams.
* Experience resolving technical issues during commissioning delivery.
* Degree or equivalent experience in relevant engineering discipline.|This role offers hands-on involvement in commissioning safety-critical I&C systems on one of the UK's most significant nuclear programmes. You will build deep commissioning capability, work alongside experienced specialists, and strengthen your long-term career within a global engineering organisation delivering nationally important infrastructure.

Benefits include:| Hybrid Working Opportunity| Flexible working hours| Market Leading Pension scheme (8% company contribution / 4% personal contribution)| 25 days' paid annual leave + bank holidays + option to buy or sell days| Professional fees reimbursed| Employee referral scheme| Competitive Sick Pay - Support when you need it| Income Protection & 3x Salary Death-in-Service Cover| Free Digital Gym…