Cell Test Engineer

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

Skills
Documentation

Experience
0-2 yrs