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