Commissioning Engineers (I&C)

Commissioning Engineer - Instrumentation & Control (I&C)

Assystem is accelerating the global energy transition through a blend of engineering expertise and cutting-edge digital technologies. Join our community of 'Switchers' and contribute to groundbreaking projects that redefine the energy sector. We are one of the top three largest independent nuclear engineering companies globally, offering a dynamic and impactful career.

About the Role

You will lead commissioning activities for complex instrumentation and control (I&C) systems across critical nuclear plant systems. Working within an integrated team, you will ensure safe, compliant system delivery through all commissioning phases.

Your Missions

• Support the preparation for installation and commissioning of complex I&C systems.
• Execute on-site commissioning tests for various plant systems and equipment.
• Review commissioning procedures and identify opportunities for continuous improvement.
• Assess the as-built installation status against approved engineering design documentation.
• Collaborate with multidisciplinary teams to ensure effective system handover.
• Ensure all commissioning activities strictly comply with nuclear safety and license requirements.
• Record and analyze commissioning data, test results, defects, and performance observations.
• Assess commissioning risks and implement appropriate mitigation strategies.
• Support the calibration, maintenance, and testing of instrumentation and actuator systems.
• Perform contractor surveillance to ensure quality and procedural compliance during commissioning.

Qualifications & Experience

• Degree or HNC qualification in a relevant engineering discipline.
• Experience commissioning systems within nuclear, power, petrochemical, or heavy industry sectors.
• Strong practical instrumentation knowledge, including impulse pipework and primary measurement elements.
• Experience commissioning pneumatic, hydraulic, and motor-operated valve systems.
• Knowledge of process measurement methods (pressure, temperature, level, flow).
• Experience interfacing with Distributed Control Systems (DCS), Programmable Logic Controllers (PLCs), and plant protection systems.
• Practical understanding of calibration methods, standards, and commissioning best practices.
• Experience commissioning and maintaining safety relief valve systems in industrial environments.
• Strong communication skills for conveying technical information clearly across teams.
• Ability to safely set up, test, and troubleshoot complex I&C systems.

Benefits

• Hybrid Working Opportunity
• Flexible working hours
• Pension scheme (8% company contribution / 4% personal contribution)
• 25 days’ paid annual leave + bank holidays, with the option to buy or sell days
• Professional fees reimbursed
• Employee referral scheme
• Competitive Sick Pay
• Income Protection & 3x Salary Death-in-Service Cover
• Free Digital Gym Access
• 24/7 Employee Support Line for mental health, financial, and legal assistance

Additional Information

• This role offers the chance to shape the UK's energy future and develop expertise in a unique environment.
• Assystem is committed to equal treatment and fostering diversity.