Powertrain Manufacturing Test Engineer

Powertrain Manufacturing Test Engineer

Garden Grove, CA

Harbinger is an American commercial electric vehicle (EV) company on a mission to transform an industry starving for innovation. Harbinger's best-in-class team of EV, battery, and drivetrain experts have pooled their deep experience to bring a first-of-its-kind EV platform to support the growing demand for medium-duty EVs and Hybrids. Harbinger:
Familiar Form, Revolutionary Foundation.

We are seeking a highly motivated Manufacturing Test Engineer to join our Powertrain Manufacturing team. This role focuses on the development, implementation, and continuous improvement of in-line and end-of-line testing for electric drive units (EDUs), stators, and rotors in a production environment. The engineer will work closely with cross-functional teams including design, quality, and production to ensure testing systems are robust, reliable, and aligned with manufacturing and product performance requirements.

• Define and manage test specifications, parameters, and acceptance criteria to ensure functional and quality compliance.
• Analyze test data, diagnose failures, and implement root cause analysis and corrective actions.
• Drive continuous improvement of testing processes through data-driven analysis, process optimization, and feedback loops with manufacturing engineering and quality teams.
• Train maintenance and production teams on test equipment operation and troubleshooting procedures.
• Lead the end-to-end sourcing and implementation of a high-volume electric drive unit EOL test rig, including scope definition, RFQ generation, vendor evaluation and selection, and technical/commercial alignment with internal stakeholders.
• Oversee vendor management through design, build, FAT/SAT, and on-site commissioning, ensuring successful integration and production launch at the manufacturing facility with full adherence to safety, quality, and throughput requirements.

• Bachelor's degree in Electrical Engineering, Mechanical Engineering, Mechatronics, or related field.
• 5-10+ years of experience in test engineering, preferably in electric powertrain or automotive manufacturing.
• Proven experience with specifying, sourcing, and launching automated test equipment in a high-volume environment.
• Experience with test automation, data acquisition systems, and industrial instrumentation.
• Knowledge of statistical process control (SPC) and design of experiments (DOE) methodologies.
• Strong analytical and problem-solving skills; ability to work in a fast-paced, collaborative environment.

Key Benefits & Perks:
Comprehensive Health, Dental & Vision (HDV) – 100% employee covered Early-stage Stock Options Robust Retirement Savings (401k, HSA, FSA) Generous Paid Time Off (PTO) & Parental Leave Annual Vacation Bonus Wellness & Fertility Benefits Cell Phone Stipend Complimentary Meals & Stocked Kitchens

$120,000 - $150,000 USD

Equal Opportunity Harbinger is an equal opportunity employer and complies with all applicable federal, state, and local fair employment practices laws. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, ancestry, sex, sexual orientation, gender, gender expression, gender identity, genetic information or characteristics, physical or mental disability, marital/domestic partner status, age, military/veteran status, medical condition, or any other characteristic protected by law.

Harbinger is committed to ensuring that our hiring process is accessible for persons with disabilities. If you have a disability or limitation, such as those covered by the Americans with Disabilities Act, that requires accommodations to assist you in the search and application process, please email us at