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, SO?, 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.

Essential Duties:

• 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, contactors, 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, SO?, 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 development of maintenance personnel in mechanical, electrical, controls, refrigeration, utility, and equipment maintenance skills.
• Identify conditions requiring specialized expertise and communicate recommendations to the Chief Mechanic, Maintenance Supervisor, vendors, contractors, engineering, or other resources.
• Maintain accurate maintenance records and documentation in the CMMS and follow established maintenance procedures.
• Support a culture of safety, reliability, continuous improvement, teamwork, and accountability.

Job Requirements:

The qualifications, knowledge, skills, and abilities listed in this job description represent the overall expectations for the position and are intended to describe the general level of competency required for the classification. An individual is not required to possess every listed skill or qualification at the time of placement or promotion; however, the individual should demonstrate proficiency in the majority of the core competencies associated with the position.

• Minimum of 5 years of industrial maintenance experience, or an equivalent combination of trade school, apprenticeship, education, and experience.
• Demonstrated advanced mechanical maintenance and troubleshooting experience in a manufacturing, food processing, winery, or similar industrial environment.
• Demonstrated experience troubleshooting industrial electrical systems and controls, including motors, motor controls, VFDs, PLCs, sensors, and instrumentation.
• Demonstrated experience troubleshooting and maintaining complex winery processing and production equipment.
• Significant experience with industrial refrigeration, ammonia refrigeration, HVAC/R, and critical utility systems preferred.
• Demonstrated industrial refrigeration experience, with working knowledge of ammonia refrigeration systems, system operation, troubleshooting, and safe maintenance practices.
• Experience with ammonia refrigeration system startup/shutdown, pump-down procedures, defrost systems, oil management, leak response, and operating parameter monitoring preferred.
• Experience with compressed air, water systems, pumps, boilers, steam, SO?, nitrogen, fire protection, wastewater, or similar industrial utility systems preferred.
• Experience performing major equipment repairs, overhauls, installations, modifications, and corrective maintenance.
• Advanced welding, fabrication, pipe fitting, equipment installation, and equipment modification experience preferred.
• Experience providing technical guidance, mentoring, or training to other maintenance personnel preferred.
• High school diploma or GED required, or equivalent combination of education and experience.
• Technical school, apprenticeship, or industry certification in industrial maintenance, electrical, HVAC/R, refrigeration, controls, or a related trade is a plus.
• EPA HVAC/R and/or RETA certification is a plus.
• Valid driver's license required.
• Must successfully complete a background check and drug screening in accordance with company policy.

Knowledge of:

• Advanced mechanical maintenance and troubleshooting of industrial processing and production equipment.
• Pumps, motors, gearboxes, conveyors, drives, bearings, mechanical power transmission, and related equipment.
• Industrial electrical systems, motor controls, starters, contactors, VFDs, PLCs, instrumentation, sensors, and electronic controls.
• Winery processing and material-handling equipment and associated mechanical and electrical systems.
• Industrial ammonia refrigeration systems, HVAC/R equipment, refrigeration controls, and related components.
• Critical winery utility systems, including compressed air, water, boilers, steam, SO?, nitrogen, fire protection, and wastewater.
• Electrical schematics, mechanical drawings, P&IDs, refrigeration diagrams, equipment manuals, and technical specifications.
• Welding, fabrication, pipe fitting, equipment installation, and modification techniques.
• Preventive and predictive maintenance practices and equipment reliability principles.
• Root-cause analysis and advanced troubleshooting methods.
• Lockout/Tagout procedures, safe work practices, and applicable safety requirements.
• Applicable electrical codes, company procedures, and industry best practices.

Ability to:

• Troubleshoot complex winery processing, mechanical, electrical, controls, refrigeration, HVAC/R, facility, and utility systems.
• Diagnose failures and identify root causes rather than simply correcting symptoms.
• Safely perform advanced maintenance activities within applicable training, certification, and authorization requirements.
• Analyze equipment operating conditions and determine appropriate repairs, adjustments, modifications, or replacement requirements.
• Troubleshoot ammonia refrigeration systems by evaluating system pressures, temperatures, levels, controls, refrigerant flow, compressor operation, condenser and evaporator performance, and other operating conditions.
• Safely perform authorized maintenance and operating activities on ammonia refrigeration systems and recognize conditions requiring immediate escalation or specialized refrigeration support.
• Interpret technical drawings, schematics, P&IDs, manuals, and control documentation.
• Make sound technical decisions while balancing safety, reliability, production, quality, and cost.
• Perform major repairs, equipment overhauls, installations, modifications, and troubleshooting with minimal supervision.
• Provide technical guidance and