BESS Certification & Test Engineer – Lead Compliance & Testing

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

Benefits offered by this job

Travel opportunities

Up to 30% travel

Job summary

Sonnen Inc. seeks a Certification and Test Engineer to lead testing, certification, and compliance for battery energy storage systems in our Atlanta, GA facilities. You will collaborate with engineering teams, suppliers, and external laboratories to verify safety and performance from development through production.

Responsibilities include managing UL certifications, developing test plans, and conducting analyses of failures. Strong writing, coordination, and lab skills are essential.

Qualifications

• Bachelor’s degree in engineering or related technical field.
• 3–5+ years of testing, certification, or compliance experience 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 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

Testing & certification experience

Technical writing

Project coordination

Data acquisition

Electrical schematics interpretation

Test automation (Python)

Education

Bachelor’s degree in engineering or related field

Tools

Python

Lab instrumentation

Job description

Sonnen Inc. seeks a Certification and Test Engineer to lead testing, certification, and compliance for battery energy storage systems in our Atlanta, GA facilities. You will collaborate with engineering teams, suppliers, and external laboratories to verify safety and performance from development through production.

Responsibilities include managing UL certifications, developing test plans, and conducting analyses of failures. Strong writing, coordination, and lab skills are essential.