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