JOB DETAILS

Senior EC&I Engineer

CompanyASSYSTEM
LocationWhitehaven
Work ModeOn Site
PostedJanuary 19, 2026
About The Company
Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition. We see ourselves as an activist in the development of nuclear energy, convinced that it is an essential part of the fight against climate change. 8,000 switchers, spread in 13 countries in Europe, Asia, Africa and the Middle East are working every day to make the energy switch by accelerating the development of nuclear and renewable energies, power grids, clean hydrogen projects and low-carbon transport. We design and supervise major projects through our engineering activities and accelerate our customers' digital transformation. We also develop new solutions to build faster and improve the performance of complex infrastructures. 59 years of experience have made Assystem a key partner of the world's largest industrial groups: CEA, EDF, ENEC, Enedis, Engie, Framatome, ITER, K.A. CARE, Naval Group, NICDC, Orano, RATP, Rolls Royce, Royal Commission, Sellafield, SNCF... Assystem is ranked in the Top 3 companies in the nuclear energy sector.
About the Role

Company Description

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

Every day, our 8,000 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 second in the world for nuclear engineering.

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

Job Description

Senior EC&I Engineer - Warrington

Full Time
Join Our Team at Assystem!

🚀 Your Future Team:

Assystem is a well-established leader in the nuclear decommissioning sector. Partner of the Design Services Alliance. Expertise in waste management services for strategic nuclear clients in the UK. Offering life extension and feasibility assessment services.

🔍 Your Missions:

  • Delivery of tasks and support requests to quality and schedule.
  • Maintaining effective communications with a wide variety of stakeholders, from plant-based staff to off-site design teams.
  • Supporting timely responses to Technical Queries and Fault Observations raised by the off-site design teams.
  • Daily liaison with the project team delivering the works.
  • Upward, prompt reporting of issues.
  • Ensure that input to designs are to required standards
  • Ensure that the work is completed to the agreed schedule.
  • Proactive interaction with other disciplines and partners to ensure overall project goals are met. Drive innovative solutions to reduce cost and schedule.
  • Participate in relevant meetings, such as Model Reviews, Design reviews.
  • Support the Lead Engineer where required.

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!

 

 

Qualifications

🎓 Essential Experience:

  • 🖥️ Educated to HNC / HND or degree in a relevant discipline or a chartered & member of an appropriate institute
  • 📊 Strong client facing skills for Intelligent Customer interactions
  • 💡Nuclear site experience (preferably Sellafield) and operating in a site-based role.
  • 📟Background experience demonstrating a record of successful delivery to timescales.
  • 📐 Experience with installation design packages and instrument datasheets. 
  • 📏 Previous design delivery experience
  • 🌟 Familiarity and experience of working and complying with applicable SL Practices, standards,  and engineering guides
  •  📈 Familiarity with SL systems e.g., Cimage, icePAC, CAESAR, AVEVA
  • 👥 Peferably DV clearance but those with SC will be considered.

Additional Information

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.

 

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.

  • ASSYSTEM Job: Engineering / Technical
  • Type of contract ASSYSTEM: Permanent
  • ASSYSTEM Sector: Nuclear
  • Key Skills
    Client Facing SkillsNuclear Site ExperienceInstallation Design PackagesInstrument DatasheetsDesign Delivery ExperienceSL PracticesEngineering GuidesCimageicePACCAESARAVEVADV ClearanceSC Clearance
    Categories
    EngineeringEnergyEnvironmental & SustainabilityConstructionScience & Research
    Benefits
    Attractive Social BenefitsOngoing TrainingCareer Opportunities
    Job Information
    📋Core Responsibilities
    The Senior EC&I Engineer will deliver tasks and support requests while maintaining effective communication with various stakeholders. They will also ensure that designs meet required standards and proactively interact with other disciplines to meet overall project goals.
    📋Job Type
    full time
    📊Experience Level
    5-10
    💼Company Size
    7982
    📊Visa Sponsorship
    No
    💼Language
    English
    🏢Working Hours
    40 hours
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