Mechanical Commissioning Engineer

Mechanical Commissioning Engineer

Location: Central London

Salary: £80,000 - £90,000 + Travel + Benefits

Type: Permanent / Full Time

Sector: Data Centres / Commercial / Pharma / Industrial

We are currently seeking an experienced Mechanical Commissioning Engineer to join one of Europe's leading MEP contractors, delivering a major high-tech commercial project in London.

This is an excellent opportunity to work with a forward-thinking contractor that delivers complex, large-scale projects across multiple sectors including data centres, pharmaceuticals, and advanced manufacturing. The company has a strong reputation for quality, innovation, and engineering excellence, with an exceptional pipeline of secured work throughout the UK and Europe.

You will take full responsibility for managing and executing all mechanical commissioning activities on-site, ensuring systems are delivered safely, on schedule, and in accordance with client specifications. The role involves coordination with design, QA/QC, and construction teams from early-stage testing through to full handover.

• Develop and implement commissioning plans, test packs, and schedules.
• Coordinate and witness FATs and SATs, ensuring compliance with ITPs.
• Manage all on-site mechanical commissioning activities including HVAC, piping, and plant systems.
• Verify installation against P&IDs, schematics, and specifications.
• Lead walkdowns, snag lists, and third-party inspections.
• Track commissioning progress using live trackers and reports.
• Ensure EHS compliance across all commissioning operations.
• Liaise with clients, design teams, and vendors to resolve technical issues.
• Manage specialist subcontractors and ensure quality documentation is complete.
• Support project handover, O&M documentation, and client training.

• Degree or advanced qualification in Mechanical Engineering / Building Services.
• Minimum 4+ years' experience delivering commissioning on major mechanical projects.
• Strong background in data centre, industrial, commercial, or pharmaceutical environments.
• Excellent understanding of HVAC systems, chilled water, pipework, and pressure testing.
• Proven ability to lead commissioning teams and manage multiple priorities.
• Experience in developing and approving test scripts, ITPs, and QA/QC documentation.
• Knowledge of Health & Safety, EHS, and Quality Work Management Systems.
• Excellent communication, reporting, and client-facing skills.
• Must have Right to Work in the UK.

• £90,000 - £100,000 base salary
• Accommodation and Travel Allowance
• Company Car / Allowance
• Long-term career development with a Tier 1 contractor
• Major UK and European project exposure