Mechanical Commissioning Engineer
12 Months
Outside IR35 - £600 per day
London and South Wales - Site Based
Data Centres / Mission-Critical Infrastructure

PROJECT OVERVIEW

Lead mechanical commissioning activities across data centre developments.
Oversee commissioning of chilled water systems, chillers, CRAH/CRAC units, AHUs, pumps and associated HVAC equipment.
Coordinate pre-commissioning inspections, pressure testing, flushing and system balancing.
Manage functional performance testing of critical cooling infrastructure.
Support Integrated Systems Testing (IST), including cooling failure simulations, redundancy testing and recovery procedures.
Coordinate mechanical subcontractors, specialist vendors and commissioning teams.
Review mechanical drawings, P&IDs, commissioning procedures and technical documentation.
Monitor commissioning progress against programme milestones.
Identify and resolve commissioning defects and outstanding works.
Coordinate with electrical commissioning teams to ensure integration of mechanical and electrical systems.
Prepare commissioning reports, test records and handover documentation.

Proven mechanical commissioning experience within data centres or mission-critical environments.
Strong technical knowledge of chilled water systems, HVAC plant and critical cooling infrastructure.
Experience commissioning CRAH/CRAC units, AHUs, chillers and pumps.
Understanding of data centre redundancy and cooling resilience.
Experience managing subcontractors and specialist equipment vendors.
Familiarity with FAT, SAT, functional performance testing and IST.
Ability to interpret mechanical drawings, P&IDs and technical specifications.
Strong commissioning documentation and handover experience.

HNC/HND or degree in Mechanical Engineering, Building Services or equivalent experience.
CSCS card.
SMSTS or SSSTS desirable.
Relevant site safety qualifications.