Senior Ammonia Refrigeration Technician – Shift Flex

Socket.dev; Milwaukee (WI); On-site; USD 65,000 - 90,000; Full time

Benefits offered by this job

Health insurance

401k

Paid time off

Holiday pay

Job summary

Lineage is hiring a Maintenance Technician III (Ammonia Refrigeration) to support our industrial cold storage facility. The role focuses on precision, reliability, and compliance in testing, inspections, and adjustments to keep systems safe and efficient.

You will perform preventive, predictive, and corrective maintenance on ammonia refrigeration and related electrical/mechanical systems, document activities in CMMS, and coordinate with contractors while maintaining safety standards across

Qualifications

• 2+ years of industrial refrigeration experience (ammonia, Freon, and/or CO₂).
• 3+ years of mechanical/electrical maintenance experience in a warehouse, processing, or manufacturing environment.
• Basic understanding of electrical instrumentation, P&IDs, pneumatics, and hydraulics.
• Strong problem-solving, communication, and documentation skills.

Responsibilities

• Perform preventive, predictive, and corrective maintenance on refrigeration, electrical, mechanical, and building systems to ensure uptime and safety.
• Troubleshoot and repair ammonia compressors, condensers, evaporators, valves, and controls per PSM/RMP and IIAR standards.
• Conduct regular inspections, testing, and calibration of refrigeration and electrical components.
• Document maintenance activities and parts usage in CMMS.
• Supervise contractors near refrigeration systems and ensure safety compliance.
• Communicate system status and recommendations to leadership and cross-functional teams.

Skills

Industrial refrigeration

Mechanical maintenance

Electrical maintenance

CMMS

P&IDs understanding

Safety compliance

Documentation

Communication

Shift flexibility

Education

Trade school training

IIAR or related certifications (preferred)

Tools

CMMS software

Job description

Lineage is hiring a Maintenance Technician III (Ammonia Refrigeration) to support our industrial cold storage facility. The role focuses on precision, reliability, and compliance in testing, inspections, and adjustments to keep systems safe and efficient.

You will perform preventive, predictive, and corrective maintenance on ammonia refrigeration and related electrical/mechanical systems, document activities in CMMS, and coordinate with contractors while maintaining safety standards across