Mechanical CX Engineer

You are a Mechanical Commissioning Engineer looking to take ownership of commissioning activities on a major project in London. This role will see you coordinating the technical design with on-site installation, right through to successful commissioning and handover.


It’s a hands-on position where you’ll be a key link between design, installation, and delivery, ensuring everything is tested, signed off, and working exactly as it should.


Your new company are a specialist contractor with a strong track record of delivering complex projects across the commercial, industrial, pharmaceutical, and data centre sectors. They focus is on high-quality engineering solutions, safety, and innovation, with a commitment to building long-term partnerships with clients.


Operating throughout London and further afield, they bring together experienced project teams, strong technical expertise, and a collaborative approach that ensures successful delivery from design through to commissioning and handover.


For those eager to learn more about this exciting opportunity, please do not hesitate to reach out to Stephen at [email protected] / 015314345



Mechanical CX Engineer Skills:

• Degree in Mechanical/Building Services Engineering (or equivalent Senior Trade qualification).
• 4+ years’ project engineering experience with a mechanical contractor.
• Proven track record delivering commissioning on commercial, industrial, pharma, or data centre projects.
• Strong technical knowledge of mechanical systems and commissioning processes.
• Excellent communication and interpersonal skills.
• Ability to manage multiple priorities and deadlines.
• Commercial awareness and good understanding of project financials.
• A proactive approach to problem-solving and decision-making.
• Commitment to safety, quality, and mentoring junior engineers.

As a Mechanical CX Engineer:

• Work in line with the project’s EHS plan and maintain high safety standards at all times.

• Develop and manage test packs with the Document Controller.
• Keep test pack and walk-down trackers up to date.
• Verify incoming equipment and materials.
• Supervise and record FATs, SATs, and witness on-site testing.
• Carry out internal pre-tests and snag walks against schematics and P&IDs.
• Track snag closures and report progress.
• Lead third-party inspections and walk-downs as required.

• Understand how commissioning ties into the overall project schedule.
• Update commissioning trackers and provide input to weekly progress reports.
• Organise and coordinate subcontractors and specialist vendors on-site.
• Raise and clarify RFIs with the design team.

• Assist in the development and execution of the commissioning plan.
• Manage and verify commissioning activities, ensuring certification is completed in line with specifications.
• Oversee the production of O&M manuals and client training.
• Conduct regular site inspections for quality, safety, and progress.

• Provide weekly engineering updates and trackers.
• Take part in technical and commissioning meetings with clients, contractors, and the project team.

• Monitor cost impacts and advise the QS/Project Manager accordingly.
• Understand variation logs, take-offs, and overall project financial fundamentals.

• Mentor junior engineers, supporting their professional growth.
• Contribute to CPD workshops and knowledge-sharing.

The Package:


Salary will be DOE, but you can expect a salary of at least £65,000 plus package.




Interviews are taking place this week so if you are interested in this role, click ‘apply now’ to forward an up-to-date CV to [email protected] or call us now on 00353(0)15314345.



The Breagh Team:


Breagh Recruitment are the go-to specialist construction and engineering recruitment consultants, providing qualified and experienced professionals with Construction jobs across the UK and Ireland, with an ethos based on flexibility, hard work, and a bit of good old common sense. We live within these core values servicing our clients and candidates daily.


Key roles we recruit for include Health & Safety managers, M&E project managers, construction managers, M&E site engineers, M&E quantity surveyors, civil engineers, site agents, estimators, buyers, bid managers and M&E site supervisors, across Ireland and the UK.


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