Senior BESS Certification & Test Engineer

sonnen; Atlanta (GA); On-site; USD 90,000 - 120,000; Full time

Job summary

sonnen is seeking a Certification and Test Engineer at the InnovationHub in Atlanta, GA to lead testing, compliance, and certification activities for battery energy storage systems. You will collaborate with engineering teams, suppliers, and external laboratories to verify product safety and performance and support certification from development through production.

Responsibilities include managing UL certifications, developing test plans, coordinating submissions, and maintaining documentation

Qualifications

• Bachelor’s degree in engineering or a related technical field, or equivalent experience.
• 3–5+ years of experience in testing, certification, or compliance for BESS, batteries, or power electronics.
• Understanding of battery management systems, power conversion systems, electrical protection, and thermal management.
• Hands-on experience with laboratory instrumentation and data acquisition.
• Experience analyzing test results, investigating failures, and writing clear technical reports.
• Ability to interpret electrical schematics, wiring diagrams, mechanical drawings, and control-system documentation.
• Experience supporting third-party BESS certification and thermal runaway testing.
• Strong technical writing, troubleshooting, and project coordination skills.

Responsibilities

• Manage BESS certification and testing programs involving UL 9540, UL 1973, UL 1741, and UL 9540A, as applicable.
• Develop compliance matrices, test plans, procedures, acceptance criteria, and technical reports.
• Coordinate certification submissions, laboratory testing, schedules, budgets, and resolution of findings.
• Perform or oversee electrical, thermal, environmental, performance, and protective-function testing.
• Analyze test failures, lead root-cause investigations, and verify corrective actions.
• Review hardware, firmware, and component changes for certification impacts.
• Maintain test records, certification documentation, and approved product configurations.
• Support production testing, certification audits, and safe laboratory practices.

Skills

Technical writing

Troubleshooting

Project coordination

Data acquisition

Interpreting electrical diagrams

Failure analysis

Thermal management understanding

Education

Bachelor’s degree in engineering or related field

Tools

Python

Laboratory instrumentation

Job description

sonnen is seeking a Certification and Test Engineer at the InnovationHub in Atlanta, GA to lead testing, compliance, and certification activities for battery energy storage systems. You will collaborate with engineering teams, suppliers, and external laboratories to verify product safety and performance and support certification from development through production.

Responsibilities include managing UL certifications, developing test plans, coordinating submissions, and maintaining documentation