Who We AreFactorial 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) that 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 OpportunityFactorial Energy is seeking a Formation Process Equipment Technician to join our Cheonan, South Korea site. This role is responsible for daily operation, routine preventive maintenance, on-site troubleshooting, minor optimization, and production stability support for full formation process equipment, including Electrolyte Filling, Formation Charging/Discharging, Degassing, Folding, OCV testing, and X-Ray inspection machines for silicon anode pouch cell lines. The incumbent will support pilot verification, NPI trial, and mass production ramp-up, assist equipment engineers with commissioning, parameter validation, and equipment retrofits, and ensure stable line operation in a fast-growing, cross-functional global manufacturing environment. In this role, you will:<ul><li>Perform daily startup inspection, standardized operation, breakdown troubleshooting, and routine preventive maintenance for full formation process equipment (Electrolyte Filling, Formation, Degassing, Folding, OCV, X-Ray) to reduce unplanned downtime and sustain line stability.</li><li>Complete regular equipment lubrication, fixture cleaning, component replacement, and precision calibration; accurately maintain maintenance logs, failure records, and spare part consumption data for audit traceability.</li><li>Adjust on-site process parameters including filling volume, formation charge-discharge curve, degassing pressure, folding precision and testing threshold to resolve common defects such as liquid leakage, poor formation activation, residual gas, folding offset and testing abnormality.</li><li>Support equipment FAT/SAT on-site acceptance, pilot line EVT/DVT/PVT trials, new product NPI verification, and mass production parameter iteration; assist engineers in equipment debugging and minor structural optimization.</li><li>Collaborate with production, process, quality, and equipment teams to handle on-site equipment abnormalities, track improvement actions, and complete CAPA closure for recurrent mechanical and electrical failures.</li><li>Support multi-spec pouch cell changeover, fixture replacement, and on-site process verification; collect on-site equipment pain points and feedback optimization suggestions to engineering and vendor teams.</li><li>Monitor real-time equipment operating status, summarize failure modes of formation &amp; testing stations, and assist in improving line OEE and cell consistency/yield.</li><li>Strictly implement equipment SOPs, safety regulations, and IATF 16949 workshop management requirements to standardize daily operation, maintenance, and on-site production management.</li></ul> We are looking for people who:<ul><li>College diploma or above, major in Mechatronics, Mechanical Maintenance, Electrical Automation, or related technical fields.</li><li>2+ years of hands-on working experience in lithium battery formation and post-process workshop, familiar with Electrolyte Filling, Formation, Degassing, Folding, OCV, and X-Ray inspection equipment.</li><li>Capable of independent daily maintenance, rapid breakdown diagnosis, and on-site parameter fine-tuning; familiar with basic servo motion, pneumatic control, precision testing, and machine vision principles.</li><li>Able to understand simple mechanical and electrical drawings, proficient in fixture assembly, disassembly and daily calibration work.</li><li>Familiar with workshop 5S management and equipment file sorting, capable of accurately filling shift logs, maintenance records, and abnormal handling reports.</li><li>Possess quick on-site response capability and good cross-department communication skills to cooperate with engineering, quality, and production teams.</li><li>Have basic English reading ability for equipment manuals and technical guidelines; basic Chinese communication capability is preferred.</li><li>Able to adapt to shift work and a mass production workshop environment, with strong safety awareness, execution, and teamwork spirit.</li></ul> Preferred Qualifications<ul><li>Rich practical experience in full-process formation equipment maintenance, including Electrolyte filling, formation cycling, degassing, folding, and X-ray testing processes.</li><li>Working experience in top-tier new energy or solid-state battery factories with formation line mass ramp-up and yield stabilization experience.</li><li>Familiar with silicon anode / high-expansion pouch cell formation characteristics, with relevant on-site equipment debugging and defect resolution experience.</li><li>Experience in pilot line trial production, equipment verification, and process transfer from lab stage to mass production.</li><li>Basic understanding of IATF 16949, APQP quality systems, and equipment abnormal closed-loop management logic.</li><li>Upgrade and retrofit mass-production final sealing, folding, and inspection equipment to improve OEE, production yield, and line capacity, and reduce manufacturing costs.</li><li>Optimize sealing fixtures, folding structures, testing probes and machine vision parameters to stabilize production, eliminate poor sealing, folding offset, OCV testing deviation and X-ray detection errors, and support rapid multi-spec pouch cell changeover.</li><li>Build complete standardized equipment management systems for post-process stations, including SOPs, maintenance schedules, calibration specifications, PFMEA, control plans, and equipment failure databases.</li></ul> 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 (<a href="mailto:recruitment@factorialenergy.com">recruitment@factorialenergy.com</a>)

Factorial is a dynamic venture-backed company dedicated to creating a sustainable future. With a passionate team of engineers and business professionals, Factorial is developing breakthrough solid-state batteries to offer longer range per charge and increased safety. The company entered joint development agreements with Mercedes-Benz, Stellantis, and Hyundai Motor Company and was recently featured in The Boston Globe and The New York Times.

Formation Process Equipment Technician

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Factorial Energy

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