Sr Field Service Technician - Refrigeration

Job Description

Job Description

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:

o Commercial rack systems

o Transcritical CO₂ systems (preferred)

o Mechanical and electrical troubleshooting

o 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