Cell Test Engineer
Confirmed on the employer's own hiring board on Nov 10, 2026. First seen by Alion on Nov 10, 2026.
Who We Are
Factorial Energy is a pioneering U.S.-based solid-state battery company driving the future of energy storage and electrification. Partnered with global leaders including Mercedes-Benz, Stellantis, Hyundai, and Kia, Factorial is at the forefront of developing next-generation e-mobility platforms for commercial, defense, and consumer applications-spanning electric vehicles (EVs), drones, eVTOL aircraft, power tools, marine systems, robotics, and more. The company has achieved multiple industry firsts, including being the first to power a demonstration vehicle with a global OEM (Mercedes- Benz), which achieved over 1,200 km (749 mi) of range, and the first to earn UN 38.3 certification for automotive-sized lithium-metal solid-state cells, and the first to deliver B-samples of automotive-sized solid-state batteries to major OEMs.
The Opportunity:
Factorial Energy is seeking a Cell Test Engineer to join our team in Cheonan, South Korea. This is an entry-level, hands-on role responsible for keeping our internal cell test lab running day to day: operating and maintaining test equipment, putting cells on test, and translating cell owners' requirements into test protocols. It is an excellent opportunity for a recent graduate to build a foundation in lithium-metal and solid-state battery testing alongside an experienced development team.
In this role, you will:
- Operate the internal cell test lab day to day, including loading and unloading cells, setting up fixtures, and starting, monitoring, and closing out tests
- Perform routine checks, calibration, and basic maintenance of test equipment (cyclers, environmental chambers, EIS, etc.), troubleshoot issues, and coordinate repairs with vendors
- Write test protocols and cycler schedules based on requirements from cell owners, and confirm test conditions before launch
- Track test status, channel and chamber utilization, and schedules, and promptly communicate progress and anomalies to cell owners
- Maintain accurate test records and sample tracking, and ensure test data is uploaded to the cell database
- Follow and help enforce lab safety procedures, including handling of lithium-metal cells, response to abnormal cells, and hazardous waste disposal
- Coordinate with external test labs for UN 38.3 and safety/abuse testing, including sample preparation, shipping documentation, scheduling, and report follow-up
- Support basic data processing and test summary reports as needed
We are looking for people who:
- Bachelor's degree in Electrical, Chemical, Mechanical, or Materials Engineering, Chemistry, or a related field
- 0-2 years of experience; internship or academic lab experience with batteries or electrochemical testing is a plus
- Basic understanding of how lithium batteries work (charge/discharge, capacity, C-rate, SOC)
- Hands-on and detail-oriented, comfortable with routine lab work and test equipment
- Strong safety awareness and discipline in following procedures
- Proficient in Excel; familiarity with battery cyclers (e.g., Neware, Maccor, Arbin) or Python is a plus
- Good communication and teamwork skills, able to work effectively with cell owners and external labs
- Fluent in English (written and spoken), basic Chinese communication capability is preferred.
Work Location:
Cheonan, South Korea
Factorial Energy is an equal opportunity employer that values diversity at all levels. All qualified applicants, regardless of personal characteristics, are encouraged to apply.
To request a reasonable accommodation to complete an application, job interview, and/or to otherwise participate in the hiring process, please contact ( [email protected])