MECHANICAL COMMISSIONING MANAGER
Location: London – Liverpool Street / Hybrid
Salary: Up to £110,000 basic
Bonus: 20%
Benefits: Pension, Healthcare, Travel & Company Benefits
Travel: International travel required – no fixed rotation
Sector: Data Centres / Mission Critical
We are currently recruiting for a Commissioning Manager – Mechanical Bias to join a major Data Centre Developer / Operator within its Global Technical Operations team.
This is a central, multi-site commissioning position supporting data centre projects from design and pre-construction through construction, commissioning, handover and live operations.
The role will have responsibility for commissioning strategy, technical governance, programme delivery, design assurance, contractor/vendor management, testing, acceptance and operational readiness across a growing data centre portfolio.
THE ROLE
Lead commissioning strategy, standards and governance across multiple data centre projects.
Manage integrated commissioning programmes from design review through to handover.
Provide technical oversight across mechanical building services and critical infrastructure.
Lead commissioning input during pre-construction, tender and design stages.
Review designs from a commissionability, maintainability and operational-readiness perspective.
Manage and coordinate CxA, commissioning contractors, vendors and specialist commissioning teams.
Lead and witness FAT, SAT and IST activities.
Oversee L1–L5 commissioning and L6 checklists.
Manage commissioning documentation, test scripts, test records and commissioning dossiers.
Drive defect, snag and punch-list close-out through to client acceptance.
Work closely with Construction, Design, Project Management, Commercial and Operations teams.
Support live data centre commissioning and asset lifecycle works.
Ensure operational readiness, O&M documentation and training requirements are completed.
Drive continuous improvement, lessons learned and standardisation of commissioning processes.
Provide technical input into resilience, availability and fault-tolerance initiatives.
EXPERIENCE REQUIRED
We are looking for someone with:
Significant Data Centre Commissioning experience.
Strong Mechanical Building Services / MEP background.
Experience across Colocation and Hyperscale Data Centres.
Strong knowledge of commissioning processes from pre-construction through handover.
Proven L1–L5 Commissioning / L6 experience.
Strong FAT, SAT and IST experience.
Experience managing CxA, contractors and vendors.
Experience reviewing data centre designs from a commissionability perspective.
Strong understanding of ASHRAE and relevant international design standards.
Experience with BMS / Controls and critical mechanical systems.
Experience with commissioning programmes, ITPs, test documentation and handover.
Experience working within a matrix organisation.
Strong stakeholder management and communication skills.
Willingness to undertake international travel.
Full driving licence.
TPBN1_UKTJ
Mechanical Commissioning Lead employer: LJB & Co
As a leading MEP construction business based in Gatwick, London, we pride ourselves on fostering a dynamic work culture that values innovation and collaboration. Our employees benefit from competitive salaries, comprehensive director packages, and ample opportunities for professional growth and mentorship within a supportive team environment. Join us to lead impactful projects in the data centre and mission-critical sectors, where your expertise will be recognised and rewarded.
