Master Chiller Mechanic

LotusWorks is an Engineering Services provider specializing in managing Commissioning, Construction Services, Calibration, Operations Maintenance scopes of work within global manufacturing facilities. LotusWorks operates globally across EMEA and North America partnering with the world's leading manufacturers across the Semiconductor, Pharmaceutical Biologics, Medical Device and Data Centre sectors. Our team of Engineering and Technical professionals is immersed in cutting-edge technologies and innovations. LotusWorks is committed to a diverse and inclusive workplace, integral to our people-first approach.

The Master Chiller Mechanic is responsible for the operation, maintenance, troubleshooting, repair, and optimization of critical chilled water and refrigeration systems supporting semiconductor manufacturing operations. This role ensures reliable and efficient performance of large-scale industrial chillers, cooling infrastructure, and associated mechanical systems in a mission-critical environment.

The ideal candidate will possess advanced knowledge of industrial HVAC, refrigeration, chilled water, condenser water, and process cooling systems, with strong troubleshooting capabilities across mechanical, electrical, refrigeration, and controls disciplines.

Responsibilities:

Operations System Monitoring

Operate and monitor centrifugal, screw, scroll, and reciprocating chillers supporting semiconductor facility operations.

Monitor chilled water, condenser water, glycol, and heat recovery systems to ensure stable and efficient operation.

Review system pressures, temperatures, flows, approach temperatures, and equipment efficiencies.

Monitor SCADA/BMS trends, alarms, and system performance to identify abnormal operating conditions.

Adjust operating parameters to maintain design conditions and optimize energy efficiency.

Coordinate chiller staging, sequencing, and load balancing strategies across plant systems.

Support seasonal startup and shutdown activities for chillers and associated utility systems.

Preventive Maintenance

Execute OEM and site-specific preventive maintenance procedures for chillers and auxiliary equipment.

Perform lubrication inspections and review oil analysis reports to support equipment reliability.

Inspect, maintain, and troubleshoot:

Compressors

Condensers

Evaporators

Cooling towers

Pumps

VFDs

Valves and actuators

Heat exchangers

Expansion devices

Conduct tube inspections and coordinate condenser/evaporator tube cleaning activities.

Replace filters, strainers, gaskets, seals, bearings, and other consumable components.

Verify proper refrigerant charge and oil levels.

Perform vibration analysis and alignment inspections on rotating equipment.

Corrective Maintenance Troubleshooting

Diagnose and resolve mechanical, electrical, refrigeration, and controls-related equipment failures.

Troubleshoot issues including:

High condenser pressure

Low evaporator pressure

Surge conditions

Oil system faults

Refrigerant leaks

Flow issues

Compressor trips

Sensor and instrumentation failures

Perform emergency repairs and equipment restoration activities to minimize operational downtime.

Coordinate outage planning, lockout/tagout (LOTO), and system isolation activities.

Support root cause analysis (RCA) investigations and implementation of corrective actions.

Refrigeration System Responsibilities

Handle refrigerants in compliance with EPA regulations and environmental requirements.

Recover, evacuate, recharge, and leak-test refrigeration systems.

Maintain refrigerant logs and environmental compliance documentation.

Inspect purge systems and monitor non-condensable gas levels.

Conduct refrigerant leak detection surveys and implement corrective actions.

Controls Instrumentation Support

Verify operation of temperature, pressure, and flow instrumentation associated with chiller systems.

Support calibration activities for sensors, transmitters, and instrumentation devices.

Assist controls technicians with BAS/PLC integration troubleshooting and system diagnostics.

Validate alarm functionality, safety devices, interlocks, and sequence-of-operations performance.

Support controls verification and operational testing activities.

Reliability Optimization

Analyze operational data and performance trends to identify degradation and reliability concerns.

Support energy optimization and efficiency improvement initiatives for chilled water and process cooling systems.

Monitor KPIs including:

kW/ton

Chiller efficiency

MTBF

Runtime distribution

PM compliance

Recommend reliability improvements, operational enhancements, and system upgrades.

Support predictive maintenance strategies including vibration analysis and thermography.

Safety Compliance

Follow all EHS procedures, LOTO requirements, and semiconductor facility safe work practices.

Conduct Job Hazard Analysis (JHA) and pre-task planning activities prior to maintenance execution.

Ensure compliance with OS…