HVAC Operations & Reliability: Perform preventive, predictive, and corrective maintenance on air handlers, chillers, boilers, heat exchangers, VAVs, exhaust systems, dehumidifiers, and split systems to maintain controlled temperature, humidity, airflow, and pressurization in GMP spaces. Cleanroom & GMP Compliance: Maintain environmental conditions per ISO 14644 classifications and facility SOPs; ensure proper HEPA filter integrity, airflow patterns, recovery times, and differential pressures; support gowning airlocks and aseptic areas.