HeeJun Hwang
Field Service Engineer
Daejeon,47
Summary
Service Technician with hands-on experience in installation, maintenance, and troubleshooting of industrial and semiconductor equipment, including cleanroom environments. Skilled in preventive and corrective maintenance, safety compliance, and customer support, with a strong foundation in aircraft mechanical engineering. Currently collaborating with global teams and developing English communication skills, seeking to advance into a Field Service Engineer role to apply technical expertise and customer-focused service.
Overview
4
4
years of professional experience
2
2
Languages
Work History
Service Technician
Cavendish Hydrogen
08.2023 - Current
- Installed, commissioned, and maintained hydrogen fueling station equipment including compressors, valves, and cooling systems, ensuring >95% equipment uptime.
- Performed emergency troubleshooting and repairs of mechanical, electrical, and PLC/SCADA systems to minimize critical downtime.
- Conducted preventive maintenance and safety inspections under strict high-pressure gas compliance standards (ISO, JHA, PTW).
- Trained operators and local staff on safe operation, routine maintenance, and troubleshooting procedures.
- Documented service activities in internal systems (ExpandIT, JIRA, Grafana) and provided technical feedback to global engineering teams for product improvement.
- Collaborated closely with cross-functional teams across Korea, EU, and US to resolve complex technical issues and support continuous improvement.
Maintenance Technician
Amkor Technology Inc
04.2022 - 08.2023
- Performed preventive and corrective maintenance on semiconductor packaging equipment in a cleanroom production environment.
- Conducted troubleshooting and root cause analysis of mechanical and electrical issues, minimizing production downtime.
- Supported production teams by ensuring compliance with cleanroom protocols and safety standards.
- Collaborated with engineering staff to implement equipment upgrades and process improvements.
- Replaced and repaired critical parts/components to ensure reliable equipment performance.
Education
Associate Degree - Aircraft Mechanical Engineering
Inha Technical College
Incheon, South Korea 04.2001 -
Skills
Technical Skills Tools & Software Language & Communication
Timeline
Service Technician
Cavendish Hydrogen
08.2023 - Current
Maintenance Technician
Amkor Technology Inc
04.2022 - 08.2023
Associate Degree - Aircraft Mechanical Engineering
Inha Technical College
04.2001 -