Commissioning Engineer (Mechanical / Process)

We're supporting a tier 1 supplier into the Nuclear industry in their search for Commissioning Engineer with a mechanical / process background. This is a permanent staff position based on site 5 days per week.

This is a unique opportunity to play a key role in the delivery of the UK's first new nuclear power station in over two decades. Working as part of a high-performing commissioning team, you will support the safe and successful commissioning of plant systems, ensuring they are fully tested, validated, and ready for commercial operation.

The role offers exposure to complex engineering challenges within a highly regulated environment and would suit candidates with commissioning experience gained within power generation, nuclear, oil & gas, petrochemical, water, utilities, or other heavy industrial sectors.

Key Responsibilities

Produce and review commissioning documentation, including test specifications and commissioning procedures.
Support the planning and preparation of commissioning activities across assigned systems.
Take ownership of commissioning test programmes and associated deliverables.
Execute site commissioning activities safely and effectively.
Supervise and coordinate contractor-led commissioning activities where required.
Analyse test results, identify issues, and support technical resolution activities.
Ensure commissioning deliverables are completed in accordance with project milestones, safety standards, and quality requirements.
Support contractual reviews, acceptance testing, and handover activities.
Work collaboratively with project stakeholders, contractors, and commissioning teams.

About You

Essential Requirements

Degree qualified (or equivalent) in Mechanical, Process, Chemical, or a related Engineering discipline.
Strong knowledge of mechanical and/or process systems.
Experience within commissioning, testing, start-up, operations, maintenance, or project delivery environments.
Strong problem-solving and technical troubleshooting skills.
Experience working within highly regulated safety and quality-led industries.
Excellent communication and stakeholder management skills.
Strong IT literacy, including:
Microsoft Excel
SharePoint
Microsoft Word
Adobe Review & Comment tools
Ability to work effectively both independently and as part of a multidisciplinary team.

Desirable Experience

Previous experience within nuclear, power generation, utilities, oil & gas, petrochemical, or heavy industrial environments.
Knowledge of Permit-to-Work systems and Lock-Out/Tag-Out (LOTO) processes.
Understanding of UK Mechanical and Electrical Safety Rules.
Experience using engineering/project software such as Fieldview, Switch, or Navisworks
Only candidates based in UK and eligible to work in UK are allowed