End-of-Line (EOL) Test Engineer

Middleby Refrigeration•Greenville, MI

just now•Onsite

About The Position

Middleby Refrigeration is seeking a hands-on and technically strong End-of-Line (EOL) Test Engineer to join our team. This role is responsible for validating the functional performance, safety, and reliability of refrigeration products at final assembly. The End-of-Line Test Engineer serves as the technical authority for product testing, failure isolation, and test process improvement, ensuring that units leaving the factory meet engineering specifications and customer expectations. This position bridges Manufacturing, Quality, and Engineering by diagnosing failures, identifying root causes, improving test methods, and preventing repeat defects — not just detecting them. This is a production-embedded engineering role requiring strong troubleshooting capability and cross-functional collaboration. If you are passionate about solving complex technical problems and driving measurable quality improvements, this is an opportunity to contribute to the continued excellence of our refrigeration brands.

Requirements

3–7+ years of experience in refrigeration, HVAC, appliance manufacturing, or similar electromechanical environments
Strong electrical troubleshooting skills
Experience diagnosing mechanical and sealed refrigeration system issues
Ability to read and interpret wiring diagrams and electrical schematics
Hands-on experience with meters, gauges, and diagnostic test equipment
Electrical diagnostics (AC/DC circuits, loads, shorts, opens)
Refrigeration system performance analysis, including: Compressor behavior
Identifying restriction vs. leak vs. inefficiency
Airflow and heat transfer effects
Ability to read and interpret wiring schematics
Data analysis and failure trend identification
Proficiency in Excel and technical documentation

Nice To Haves

Associate’s or Bachelor’s degree in Engineering, Engineering Technology, HVAC/R, or a related field
Experience in manufacturing test engineering, validation, or quality environments
Working knowledge of refrigeration cycle performance and system behavior
Experience with root cause methodologies (5 Whys, Fishbone/Ishikawa, Fault Isolation)
Experience collaborating with production teams and technicians
Preferred: Experience creating and managing Power BI reports

Responsibilities

Perform and oversee end-of-line (EOL) testing of refrigeration systems
Conduct component checks
Verify electrical loads and confirm acceptable current draw limits
Validate control board functionality
Perform safety and wiring validation
Verify unit performance against engineering specifications and acceptance criteria
Identify abnormal operating conditions (restriction, undercharge, overcharge, airflow issues)
Diagnose failing units using structured troubleshooting methodology
Prevent unnecessary part replacement by verifying true root failure cause
Support technicians and production with proper repair direction
Lead root cause analysis for repeat EOL failures and field returns
Track defect trends in Power BI and escalate systemic issues
Provide engineering feedback for design or process improvements
Maintain and improve EOL test procedures and standards
Support development of automated test sequences and error detection logic
Improve fault detection capability (capture true failures, reduce false failures)
Train operators on proper test interpretation and troubleshooting
Assist NPI builds and pilot runs to establish test criteria
Maintain test documentation, reports, and failure records
Analyze test data to identify trends and early failure indicators
Support warranty and reliability analysis