Sr Field Service Technician - Refrigeration

Job Summary

Experienced Senior Refrigeration Technician with strong hands-on expertise in DX refrigeration systems and CO₂ (R744) refrigeration. This role supports commercial and industrial refrigeration installations, service, troubleshooting, startups, and commissioning focus on Walmart business. The ideal candidate is self-sufficient in the field, safety-focused, and comfortable working on advanced refrigeration and control systems.

Key Responsibilities

• Service, diagnose, and repair DX and CO₂ refrigeration systems, including single systems, rack systems, and trans critical CO₂ applications

• Perform system startups, commissioning, for new and retrofit installations

• Troubleshoot mechanical, electrical, and control-related issues, including compressors, valves, sensors, gas coolers, and electronic expansion devices

• Interpret P&IDs, wiring diagrams, schematics, and control sequences

• Properly document service activities, findings, and corrective actions using service reports

• Work safely and in compliance with EPA, OSHA, and company safety standards

• Collaborate with project managers, service coordinators, OEMs, and customers

• Provide technical support and mentorship to 1st tier support technicians when needed

Required Qualifications

• 5–10 years of refrigeration experience, with a strong emphasis on DX systems

• Demonstrated, hands-on experience with CO₂ (R744) refrigeration systems

• Strong working knowledge of:

  • Commercial rack systems
  • Transcritical CO₂ systems (preferred)
  • Mechanical and electrical troubleshooting
  • Refrigeration controls and sensors

• Ability to work independently in customer facilities

• EPA Section 608 Certification (Universal preferred)

• Valid driver’s license with acceptable driving record

• Willingness to work on-call or travel as required

Preferred Qualifications

• Startup and commissioning experience for CO₂ systems

• Experience with OEM platforms such as Danfoss, Emerson, Carel, Hussmann, or Hillphoenix

• Vocational, technical school, or apprenticeship background

• Experience in industrial, grocery, cold storage, or data center environments

Physical & Work Requirements

• Ability to lift up to 50–75 lbs

• Ability to work at heights, in mechanical rooms, and outdoor environments

• Comfortable working in cold and hot conditions

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