Test Supervisor

At IEM, we’re not just building innovative electrical distribution systems, we’re shaping the future. IEM is dedicated to delivering world-class solutions for complex power needs. After 75 years, we continue to push the boundaries of what’s possible. Whether you’re an experienced professional or just starting out, you’ll have the opportunity to contribute, grow, and make a lasting impact on industries that power the world’s most dynamic markets.

Location:
San Antonio TX

IEM is currently seeking a Test Supervisor for our San Antonio, TX and will report into the VP of Quality & Reliability. This role leads daily test operations across all product lines, ensuring safe, efficient, and compliant execution of electrical testing. The Test Supervisor manages test technicians, drives throughput, and ensures product performance through troubleshooting and process control. This position also provides technical leadership by supporting test development, failure analysis, and continuous improvement across the test organization.

This position will be based temporarily in NE San Antonio while our
new manufacturing plant
is coming online. Our permanent location is approximately 25 minutes away at Brooks, 7515 Inner Circle Dr., San Antonio, 78235. The position is also 100% in-office and does not offer remote work.

• Lead daily activities of Test Technicians across specific product lines within the site.
• Align test execution with production schedules and site priorities to maintain flow and prevent bottlenecks.
• Oversee all electrical testing activities including Hi-Pot, Megger, functional testing, relay testing, current injection, and system validation.
• Drive troubleshooting of wiring errors, control logic issues, and component failures to minimize downtime.
• Support development and refinement of test procedures, work instructions, and standard processes.
• Collaborate with Engineering and Production to resolve test failures, design gaps, and documentation discrepancies.
• Review and validate test data, logs, and reports to ensure accuracy and completeness.
• Support Factory Witness Testing (FWT) by coordinating execution, providing technical explanations, and addressing customer questions.
• Monitor and drive performance metrics including first pass yield, test throughput, downtime, and rework.
• Ensure all testing is performed in compliance with UL standards, customer requirements, and safety policies.
• Maintain test equipment readiness, including calibration, functionality, and safe operation.
• Lead root cause investigations and support corrective actions for recurring test or quality issues.
• Train and mentor team members on test procedures, troubleshooting techniques, and safety practices.
• Communicate risks related to schedule, equipment, material, or technical issues to leadership.
• Drive continuous improvement in test processes, equipment utilization, and workflow efficiency.
• Enforce escalation processes for safety, quality, and critical failures.
• Manage workforce expectations including performance, accountability, and attendance.
• Flexible and adaptable team player who operates with agility and resourcefulness and thrives in an often-changing environment. You will be operating with a start-up mindset and must be willing to help wherever needed - "not my job" is an unacceptable response.

• Test Technicians.
• Test Leads.

• Safety and Compliance:
• Strong understanding of electrical safety including NFPA 70E, PPE, and safe test practices.
• Knowledge of UL standards, customer specifications, and test compliance requirements.
• Technical Expertise:
• Strong understanding of electrical systems, switch gear, and test methods.
• Ability to read and interpret schematics, wiring diagrams,…