Senior / Staff Welding & Sealing Equipment Engineer
Factorial EnergyCheonan, South Korea
Full Time
Posted August 4, 2026
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Job Description
Cheonan, South Korea
Key Responsibilities
- Factorial Energy is seeking a Senior / Staff Welding & Sealing Equipment Engineer to join our Cheonan, South Korea site. This person will own the full-cycle development, commissioning, customization, optimization, and mass production scaling of automatic welding and sealing equipment for our Silicon Power Cell pouch cell line. This person will lead welding & sealing equipment R&D, prototype debugging, pilot verification, and mass production iteration; deliver equipment technical upgrades, OEE and yield improvements, and build standardized equipment management systems.
- Lead full-lifecycle development, commissioning, and mass-production validation of automatic welding and sealing equipment, iterate core process parameters, and complete equipment adaptation for new product launch.
- Conduct equipment review, FAT/SAT acceptance and IQ/OQ/PQ qualification, and unify precision and quality control standards for welding and sealing processes.
- Upgrade and retrofit mass-production welding and sealing equipment to improve OEE, production yield and line capacity, and reduce manufacturing costs.
- Optimize welding fixtures, sealing structures and core process parameters to stabilize production, eliminate welding spatter, virtual welding, seal leakage and wrinkling issues, and support rapid multi-spec pouch cell changeover.
- Build complete standardized equipment management systems for welding and sealing stations, including SOPs, maintenance schedules, calibration specifications, PFMEA, control plans, and equipment failure databases.
- Collaborate with cross-functional teams (R&D, Process, Quality, Manufacturing, Maintenance) and external vendors to advance new line startup, equipment development and technical renovation projects.
- Optimize laser welding energy control, servo positioning logic, and sealing pressure/temperature closed-loop parameters to adapt silicon anode cell characteristics and eliminate assembly defects.
- Lead equipment technical transfer from lab/pilot EVT/DVT/PVT to mass production, identify equipment bottlenecks and drive sustained yield improvement.
- Adopt 8D, DOE, SPC, and root-cause analysis to resolve typical welding and sealing abnormalities, drive cross-functional troubleshooting, and close CAPA for recurrent equipment failures.
Requirements
- Bachelor’s degree or above in mechanical, mechatronics, electrical automation, materials, chemical engineering or related fields.
- 3+ years of experience in pouch cell welding & sealing equipment development, retrofit and production ramp-up.
- 2+ years of professional experience in laser welding and thermal sealing equipment structure and control logic; skilled in welding energy tuning, track precision control, temperature/pressure parameter calibration and sealing uniformity optimization.
- Capable of mechanical/electrical drawing reading and CAD/SolidWorks fixture design; familiar with laser control system, servo motion, constant temperature-pressure control and precision automation systems.
- Proficient in DOE, PFMEA, Control Plan, 8D and root cause analysis; independent in equipment troubleshooting and technical optimization.
- Experienced in pouch cell welding & sealing line NPI and mass production ramp-up projects.
- Equipped with cross-functional coordination, project management and overseas vendor communication abilities; competent in on-site troubleshooting and English technical documentation.
- Proficient in English for technical document reading, global technical meetings and technical report delivery.
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