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⚡ Source: ReedRef: 56875488

Commissioning Lead Mechanical

Appcast Enterprise·Dublin, Suffolk·Posted yesterday
⭐ Senior
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Job description

Original text imported from Reed

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

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Key skills

AI-extracted from the job advert

Must-have skills
Mechanical commissioningLiquid-cooled data centre systemsHydronic system designBMS/PLC integrationMission-critical facilitiesMechanical Engineering qualification
Nice-to-have
Multi-geography experienceRegional team managementTechnical documentationControls integration
Soft skills
Technical leadershipTechnical documentationProblem solvingCommunicationAutonomyPressure management
SpeedCV AI

Application advice

5 AI-generated recommendations to maximise your chances.

1

⭐ Highlight your liquid cooling commissioning experience prominently as this is explicitly required for next-generation data centres

2

📊 Quantify your commissioning achievements: 'Led commissioning of 15 data centres, reducing thermal issues by 40%'

3

🌐 Emphasise multi-geography experience as the role involves overseeing regional teams across different locations

4

🎯 Showcase your technical authority credentials - mention specific systems you've commissioned (CDUs, heat exchangers, hydronic systems)

5

🤝 Demonstrate your ability to collaborate across disciplines, particularly with electrical and controls teams during IST phases

See the 2 remaining tips
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Suggested CV bullets

3 bullets our AI drafted for this specific advert, mirroring its ATS keywords.

How to tailor your CV

Add these 3 bullets under your most recent experience:

  • •Developed mechanical commissioning strategy for 8 liquid-cooled data centres, reducing commissioning time by 25% through standardised L1-L5 test procedures
  • •Led Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT) for 12 Direct-to-Chip cooling systems, achieving 98% first-pass success rate
  • •Governed commissioning execution across 4 regional teams spanning Europe and Asia, ensuring consistent quality standards and reducing rework by 30%
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Dear Hiring Manager,

Silent Aire's focus on next-generation liquid cooling technology aligns perfectly with my expertise in mechanical commissioning of mission-critical data centres. With extensive experience in Direct-to-Chip systems and hydronic commissioning, I am well-positioned to develop and lead your mechanical commissioning strategy.

My background in commissioning liquid-cooled data centre systems across multiple geographies has equipped me with the technical authority and regional oversight capabilities essential for this senior role. I have successfully developed commissioning methodologies, authored comprehensive procedures, and governed execution standards across distributed teams.

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Interview questions

10 questions generated from this advert.

Technical

  • ›Explain the commissioning process for Direct-to-Chip liquid cooling systems
  • ›How do you approach pressure testing and leak detection in liquid-cooled data centres?
  • ›Describe the integration challenges between mechanical systems and BMS/PLC controls
  • ›What are the key differences between L1-L5 test levels in mechanical commissioning?
  • ›How do you validate thermal performance and redundancy in mission-critical cooling systems?

Behavioural

  • ›Describe a time when you had to resolve a complex commissioning issue under pressure
  • ›How do you ensure consistent quality when overseeing multiple regional teams?
  • ›Tell me about a situation where you had to challenge a design during the commissioning phase
  • ›Describe your approach to mentoring junior commissioning engineers across different locations
  • ›How do you handle conflicting priorities between client demonstrations and technical compliance?
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STAR answer examples

Model answers using the Situation-Task-Action-Result framework. Adapt to your own experience.

1Question

Describe a time when you had to resolve a complex commissioning issue under pressure

During the commissioning of a 2MW liquid-cooled data centre, we discovered a 15% thermal performance shortfall just 3 days before client demonstration. The issue stemmed from incorrect coolant flow distribution across 24 server racks. I immediately assembled a cross-functional team including controls engineers and the design team. We identified that the Coolant Distribution Unit's flow balancing valves were incorrectly calibrated. I developed an emergency re-commissioning procedure, working 18-hour days to recalibrate all flow circuits. We achieved full thermal performance within 48 hours, allowing the client demonstration to proceed successfully and securing the £2.8M contract.
2Question

How do you ensure consistent quality when overseeing multiple regional teams?

When managing commissioning across 6 regional teams for a global data centre rollout, I established standardised governance processes. I created detailed commissioning checklists with 47 mandatory hold points and implemented weekly video audits of each team's progress. I also developed a peer review system where teams would cross-validate each other's test results. This approach identified 12 potential issues before they became problems, maintained 95% consistency across all regions, and reduced overall commissioning time by 20% through shared learnings and best practices.
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