Industrial Refrigeration Mechanic III

Maintenance Mechanic 3

Maintenance Mechanic 3 is an advanced-level maintenance position responsible for troubleshooting, repairing, maintaining, and improving winery processing equipment, facility systems, utilities, refrigeration, electrical systems, controls, and other critical plant equipment. The position supports safe, reliable, and efficient operation of the winery by diagnosing complex equipment problems, performing major repairs and equipment modifications, and identifying opportunities to improve equipment reliability and performance.

The Mechanic 3 applies advanced mechanical, electrical, controls, refrigeration, HVAC/R, and utility knowledge across the winery. This includes processing and production equipment, material-handling systems, facility infrastructure, industrial refrigeration, HVAC/R, electrical systems, instrumentation and controls, and critical utilities such as compressed air, water, boilers, steam, SO₂, nitrogen, fire protection, and wastewater systems.

The Mechanic 3 works with minimal supervision on complex maintenance activities and serves as a senior technical resource for the Maintenance Department. The position provides technical guidance and mentoring to Mechanic 1 and Mechanic 2 employees, supports preventive and predictive maintenance and reliability initiatives, and recognizes when additional support from the Chief Mechanic, contractors, vendors, engineering, or Maintenance leadership is required.

• Operate, maintain, diagnose, and repair all ammonia refrigeration, SO2, boiler, and utility systems at an advanced level, serving as the primary technical resource for these systems within the maintenance department.
• Perform advanced troubleshooting, repair, inspection, installation, and preventive and predictive maintenance on winery processing equipment, production systems, conveyors, pumps, motors, gearboxes, drives, material-handling equipment, and related machinery.
• Diagnose complex mechanical, electrical, controls, instrumentation, refrigeration, HVAC/R, and utility system problems and determine appropriate corrective actions.
• Troubleshoot electrical systems from 24V through 480V, including motors, starters, contractors, breakers, fuses, VFDs, sensors, controls, and related components within applicable training and authorization.
• Troubleshoot, repair and maintain PLCs, instrumentation, sensors, control devices, and other industrial automation systems.
• Perform major equipment repairs, overhauls, installations, modifications, alignments, and equipment improvements.
• Troubleshoot, repair and maintain industrial ammonia refrigeration, HVAC/R, compressors, condensers, evaporators, pumps, valves, controls, and related equipment.
• Diagnose ammonia refrigeration system performance issues involving suction and discharge pressures, temperatures, refrigerant flow, oil management, system levels, condenser performance, evaporator performance, and related operating conditions.
• Perform and support refrigeration system pump-downs, startup and shutdown procedures, defrost operations, equipment changeovers, and other system operating activities within applicable training and authorization.
• Provide advanced technical support for critical winery utility systems, including compressed air, wells and water systems, boilers and steam, SO₂, nitrogen, fire protection, wastewater, pumps, valves, piping, and associated controls.
• Monitor equipment and system operating conditions and identify opportunities to improve reliability, efficiency, safety, and performance.
• Support equipment startups, shutdowns, commissioning, major repairs, and equipment modification projects.
• Assist in developing and improving preventive and predictive maintenance strategies for critical equipment and systems.
• Perform root-cause troubleshooting and recommend corrective actions to prevent recurring failures, downtime, and production interruptions.
• Read and interpret electrical schematics, mechanical drawings, P&IDs, refrigeration diagrams, equipment manuals, and technical documentation.
• Provide technical guidance, mentoring, and hands-on support to Mechanic 1 and Mechanic 2 employees.
• Assist with training and…