Commissioning Engineer

Job Title: Commissioning Mechanical Engineer – Data Centres – ENGLISH NECESSARY!

Europe / Ireland (Project-Based) | Tier 1 Contractor

Overview

We are seeking an experienced Commissioning Mechanical Engineer with a strong background in data centre environments to lead the commissioning of critical HVAC and mechanical systems. This role focuses on air and water-side systems , including performance validation of flow rates, air volumes, and system balancing , ensuring all installations meet mission-critical standards.

Key Responsibilities

• Lead commissioning of mechanical systems across data centre projects
• Commission HVAC systems including CRAH/CRAC units, chillers, AHUs, and cooling infrastructure
• Perform and validate air-side commissioning :
• Airflow measurement (CFM)
• Air changes per hour (ACH)
• Pressurisation and containment performance
• Perform and validate water-side commissioning :
• Chilled water and condenser water flow rates (L/s, m³/h)
• Pump performance and head pressure verification
• System balancing across distribution networks
• Verify thermal performance and cooling capacity against design criteria
• Develop and execute commissioning plans, scripts, and procedures
• Lead system balancing activities (TAB – Testing, Adjusting & Balancing)
• Support and coordinate pre-commissioning, functional testing, and IST
• Witness and manage FAT & SAT for mechanical systems
• Troubleshoot performance issues related to flow, pressure, and temperature stability
• Coordinate with BMS/controls teams for system optimisation and integration
• Ensure compliance with project specifications, ASHRAE guidelines, and client standards
• Maintain detailed commissioning records, reports, and validation documentation
• Support project handover including O&M manuals and client training

Requirements

• Degree in Mechanical Engineering or related discipline
• Minimum 5 years’ data centre commissioning experience (essential)
• Strong hands-on experience with HVAC systems in mission-critical environments
• Proven experience measuring and validating:
• Air volumes (CFM)
• Water flow rates (L/s, m³/h)
• Pressure differentials and system balancing
• Expertise in air and water-side commissioning
• Experience with chillers, CRAH/CRAC units, pumps, AHUs, and cooling towers
• Solid understanding of TAB processes and commissioning methodologies
• Experience with IST, FAT, and SAT
• Familiarity with BMS and control systems integration
• Experience on Tier 1 or large-scale MEP/data centre projects
• Strong analytical and troubleshooting skills

Desirable

• Hyperscale data centre experience
• Knowledge of ASHRAE and data centre cooling standards
• Experience with performance optimisation and energy efficiency
• Familiarity with digital commissioning / TAB tools

What We Offer

• Competitive salary and rotation package
• High-profile data centre projects across Europe
• Strong career progression opportunities
• Exposure to cutting-edge mission-critical environments
• Collaborative, high-performance teams

How to Apply

Please submit your CV highlighting your data centre commissioning experience , including airflow and water flow validation, system balancing, and HVAC performance testing .