End-of-Line (EOL) Test Engineer at Middleby Refrigeration – Greenville, Michigan

Now Hiring

End-of-Line (EOL) Test Engineer

Location: Greenville, Michigan

Reports to: Quality Manager

Employment Status: Hourly non-exempt

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.

Perks you can expect from us:

• A competitive benefits package including 401(k) matching
• Company provided life insurance, short and long-term disability insurance
• Paid time off at start
• Paid holidays
• Tuition reimbursement
• Employee referral program.

Expected Hours of Work:

This position is full-time. The general scheduled workdays are Monday through Thursday, 10-hour shifts. Overtime may be required based on business needs.

Position Overview:

The End-of-Line (EOL) Test Engineer is responsible for validating refrigeration product performance at final assembly and ensuring compliance with engineering specifications and acceptance criteria.

This role focuses on structured failure diagnostics, root cause analysis, and continuous improvement of test processes to improve first-pass yield, reduce repeat failures, and prevent warranty escapes.

Responsibilities:

Final Product Functional Testing

Perform and oversee end-of-line testing of refrigeration systems including:

• Compressor operation
• Electrical loads and current draw
• Temperature pull-down performance
• Thermistor response
• Fan and pump operation
• Valve actuation
• Control board functionality
• Safety and wiring validation
• Verify unit performance against engineering specifications and acceptance criteria
• Interpret electrical readings (voltage, amperage, resistance) and refrigeration system behavior
• Identify abnormal operating conditions such as restriction, undercharge, overcharge, airflow issues, or electrical faults

Failure Diagnostics & Isolation

• Diagnose failing units using structured troubleshooting methodology
• Differentiate between:
• Assembly errors
• Electrical faults
• Sealed system refrigeration issues
• Component defects
• Control logic or programming issues
• Prevent unnecessary part replacement by verifying true failure cause
• Support technicians and production teams with accurate repair direction

Root Cause & Corrective Actions

• Lead root cause analysis on repeat EOL failures and field returns
• Perform verification testing to confirm failure mechanisms
• Develop corrective actions and validate effectiveness
• Track defect trends and escalate systemic issues
• Provide engineering feedback for design or process improvements

Production & Cross-Functional Support

• Serve as technical escalation point for EOL technicians and inspectors
• Train operators on proper test interpretation and troubleshooting
• Communicate clearly with:
• Manufacturing
• Quality
• Design Engineering
• Service and Warranty teams
• Assist NPI builds and pilot runs to establish test criteria and validation standards

Documentation & Data Analysis

Maintain test documentation, reports, and failure records

Analyze test data to identify trends and early failure indicators

Support warranty and reliability analysis

Maintain traceability of failures and corrective actions

Qualifications:

Skills & Competencies:

• Strong electrical troubleshooting ability
• Experience diagnosing mechanical and sealed system refrigeration issues
• Ability to read wiring diagrams and electrical schematics
• Hands-on experience with meters, gauges, and test equipment
• Strong analytical and root cause problem-solving skills
• Ability to work cross-functionally in a production environment
• Detail-oriented with strong documentation and data analysis skills

Education & Experience:

• 3–7+ years of experience in refrigeration, HVAC, appliance manufacturing, or similar electromechanical manufacturing environment
• Associate or Bachelor’s degree in Engineering, Engineering Technology, HVAC/R, or related field preferred
• Experience in manufacturing test engineering or validation preferred
• Experience with root cause methodologies (5 Why, Fishbone, Fault Isolation) preferred

Physical Requirements

• Ability to work in a manufacturing environment
• Ability to stand for extended periods
• Ability to lift up to 40 lbs occasionally
• Ability to work hands-on with refrigeration and electrical test equipment

Working Conditions:

• Manufacturing environment
• Production-embedded engineering role
• Full-time schedule with overtime as business needs require

If interested in the position, Click here to Apply!