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 focusing on Walmart business. The ideal candidate is self‑sufficient in the field, safety‑focused, and comfortable working on advanced refrigeration and control systems.

• Service, diagnose, and repair DX and CO₂ refrigeration systems, including single systems, rack systems, and transcritical CO₂ applications
• Perform system startups and 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

• 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

• 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

• 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