Commissioning Lead (Mechanical) – Liquid Cooled Data Centres

Silent Aire – Dublin

What you will do

We are seeking a Senior Mechanical Commissioning Engineer to own and lead the commissioning strategy for liquid-cooled mechanical systems within next-generation data centre deployments. This role sits within a central commissioning function, responsible for developing commissioning methodology, authoring procedures, and ensuring consistent, high-quality execution across regional site teams.

The successful candidate will be a recognised technical authority in liquid cooling and mission-critical mechanical systems, with the credibility and experience to govern commissioning activity from design review through IST, client demonstration, and handover.

How you will do it

Commissioning Strategy & Technical Leadership

• Develop and own the mechanical commissioning strategy for liquid-cooled data centre products
• Define commissioning philosophy, test levels (L1–L5), hold points, and acceptance criteria
• Provide design-for-commissioning input during early design and product development phases
• Act as final technical authority for mechanical commissioning issues and risk resolution

Systems Scope

• Direct-to-Chip (DTC) liquid cooling systems
• Coolant Distribution Units (CDUs)
• Facility and secondary heat rejection systems (dry coolers, chillers, plate heat exchangers)
• Pumps, valves, pipework, filtration, water treatment
• Leak detection and containment systems
• Integration with IT thermal loads and controls

Procedure & Documentation Development

• Author and maintain:
  • Mechanical commissioning plans
  • Pre-commissioning and flushing procedures
  • Pressure testing and leak testing scripts
  • Thermal performance and load validation test scripts
  • Define measurable pass/fail criteria for all mechanical systems

Site & Regional Team Oversight

• Provide governance and technical oversight to regional mechanical commissioning teams
• Audit commissioning execution for compliance with strategy and standards
• Witness Factory Acceptance Tests (FAT), Site Acceptance Tests (SAT), and critical onsite tests
• Support regional teams with complex fault finding and system tuning

Integrated Testing & Handover

• Collaborate with electrical and controls leads during:
  • Integrated Systems Testing (IST)
  • Failure-mode and redundancy testing
• Support client demonstrations and formal handover
• Ensure readiness for live IT load introduction

What we look for

• 10+ years’ experience in mechanical commissioning of mission-critical facilities
• Demonstrable experience commissioning liquid-cooled data centre systems.
• Strong working knowledge of:
  • Hydronic system design and commissioning
  • Controls and BMS / PLC interaction
  • Redundancy and failure-mode analysis
• Experience working across multiple geographies with regional teams
• Relevant engineering qualification (Mechanical Engineering or equivalent)
• Calm and authoritative under pressure
• Strong technical documentation skills
• Pragmatic, outcome-focused approach to commissioning
• Willingness to travel to support FATs and critical site activities
• Able to challenge unsafe or non-compliant commissioning practices

#AVRIL

#LI-Onsite