Commissioning Lead (Mechanical)

YDU JC Air Cond & Ref Inc.- Dubai; Dublin; On-site; EUR 110,000 - 170,000; Full time

Job summary

Johnson Controls in Dublin seeks a Senior Mechanical Commissioning Engineer to own the commissioning strategy for liquid-cooled data centre systems. You will develop methodologies, author procedures, and govern execution across regional site teams, serving as the technical authority from design review through IST and handover.

The role requires 10+ years in mission-critical mechanical commissioning, strong hydronic and BMS/PLC knowledge, cross-geography collaboration, and a pragmatic,

Qualifications

• 10+ years of experience in mechanical commissioning of mission-critical facilities.
• Proven experience commissioning liquid-cooled data centre systems.
• Strong knowledge of hydronic design and commissioning.
• Experience with BMS/PLC interaction and fault analysis.
• Willingness to travel for FATs and critical site work.
• Excellent technical documentation skills.

Responsibilities

• Own the mechanical commissioning strategy for liquid-cooled data centre products.
• Define commissioning philosophy, test levels, hold points, and acceptance criteria.
• Provide design-for-commissioning input during early design and product development.
• Act as final technical authority for mechanical commissioning issues and risk resolution.
• Audit commissioning execution for compliance with strategy and standards.
• Witness FAT, SAT, and critical onsite tests.
• Support regional teams with complex fault finding and system tuning.
• Collaborate with electrical and controls leads during IST and handover.

Skills

10+ years experience

Liquid-cooled data centres

Hydronic design

BMS/PLC integration

Travel willingness

Technical documentation

Education

Mechanical Engineering degree or equivalent

Job description

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

Johnson Controls: Enhancing the Intelligence of Buildings

Your buildings have a purpose. They are places for people to live or work. Facilities for learning or healing. Venues for entertainment and shopping. Sites for the specialized storage of tangible goods or mission-critical data. Your buildings have a huge variety of functions; they are central to your mission. This is where Johnson Controls comes in, helping drive the outcomes that matter most. Through a full range of systems and digital solutions, we make your buildings smarter. A smarter building is safer, more comfortable, more efficient, and, ultimately, more sustainable. Most important, smarter buildings let you focus more intensely on your unique mission. Better for your people. Better for your bottom line. Better for the planet. At Johnson Controls, we've been making buildings smarter since 1885, and our capabilities, depth of innovation experience, and global reach have been growing ever since. Today, we offer the world's largest portfolio of building products, technologies, software, and services; we put that portfolio to work to transform the environments where people live, work, learn and play.