Refrigeration Technician III

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

Shift Schedule: Monday - Friday, 8:00am - 4:30pm (flexibility between 1st and 2nd shift)

Join Lineage – The World’s Leading Temperature-Controlled Logistics Company

At Lineage, innovation and efficiency drive everything we do. We are seeking a Maintenance Technician III (Ammonia Refrigeration Technician) at the intermediate to advanced level to support the upkeep of our industrial cold storage facility and the essential equipment that keeps operations running. This hands‑on role is perfect for technicians who take pride in precision, reliability, and compliance—performing regular testing, inspections, and adjustments to ensure every system operates to exact design and safety standards.

Key Responsibilities

• Perform preventive, predictive, and corrective maintenance on industrial refrigeration, electrical, mechanical, and building systems to ensure optimal uptime and safety.

• Troubleshoot and repair ammonia compressors, condensers, evaporators, valves, and controls in compliance with all PSM/RMP and IIAR standards.

• Conduct regular inspections, performance testing, and calibration of refrigeration and electrical components to maintain system integrity and efficiency.

• Document all maintenance activities and parts usage in the Computerized Maintenance Management System (CMMS).

• Support and monitor contractors working on or near refrigeration systems, ensuring full adherence to company and regulatory safety protocols.

• Communicate system status, findings, and maintenance recommendations clearly to leadership and cross‑functional teams.

Minimum Qualifications:

• 2+ years of industrial refrigeration experience (ammonia, Freon, and/or CO₂); trade school or equivalent training preferred.

• 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; able to convey technical details to non‑technical audiences.

• Proficient in basic computer applications (Word, Excel, CMMS).

• Ability to work in extreme temperature environments (−20°F to 100°F) and lift up to 40 lbs.

• Flexible to work various shifts, weekends, and overtime as needed.

Preferred Qualifications:

• RETA, GCAP, or IIAR certifications such as CARO, CIRO, or Operator I/II are highly valued — or willingness to obtain within 6 months of hire.

Why Lineage?
This is an excellent position to begin your career path within Lineage! Success in this role enables greater responsibilities and promotions! A career at Lineage starts with learning about our business and how each team member plays a part each and every day to satisfy our customers’ requirements. Beyond that, you’ll help us grow and learn on our journey to be the very best employer in our industry. We’ll ask you for your opinion and ensure we do our part to keep you developing and engaged as we grow our business. Working at Lineage is energizing and enjoyable. We value respect and care about our team members.

Lineage is an Equal Employment Opportunity Employer and is committed to compliance with all federal, state, and local laws that prohibit workplace discrimination and unlawful harassment and retaliation. Lineage will not discriminate against any applicant on the basis of race, color, age, national origin, religion, physical or mental disability or any other protected status under federal, state and local law.

Benefits

Lineage provides safe, stable, reliable work environments, medical, dental, and basic life and disability insurance benefits, 401k retirement plan, paid time off, annual bonus eligibility, and a minimum of 7 holidays throughout the calendar year.