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 exec...