- Provided technical support and troubleshooting service on Graphite Heating System with vacuum/High Pressure vessel and Plasma Nitriding System product-lines.- Projected major repair and overhaul service for Korean customers, with increased revenue.- Planned and controlled major repair/overhaul projects for Korean customers- Technical service, spares and project sales for global and local customers.

- Certified Airworthiness by technical documentations and aviation law, with special authorization for Engine Assurance Test on ground.- Technical advice and troubleshooting on Flight Operation irregularities, with Flight Engineer duty.- Projected Aircraft In-service programs with aligning National Security Requirement and audit.- Reviewed technical issues and controlled non-routine maintenance plans.- Controlled Aircraft Delivery programs on site and consulted remote.- Managed fleet configurations with effective SB and embodiment status.

Performed Preventative Maintenance/Rebuild/Modification/Functional Test activities on FAA approved Active Temperature Control Container (RKN/RAP) and coordinated Technical Support Team to resolve functional issues from customers. Also carried out troubleshooting actions on system level.As Supervisor role, conducted with Safety/Quality issues to maintain station's capability and controlling Repair Station facility, tool/equipment and inventory items.

Delivered preventative maintenance, troubleshooting, repair and technical guidance service on U.S. Advantest 5033/5037 Semiconductor System Level Tester (Handler and Testing Chamber Set). Performed Advantest components modification, update and conversion with supporting customer’s NPI project or new Test flow.Corresponded with customers, OSAT and production support at Irvine office, by web production meeting. Updated current site issues and corrective actions and coordinated facility safety audits by Occupational Safety Act and OSAT safety standards.

Performed Aircraft Heavy Maintenance (C & D Check packages on company fleets) and troubleshooting and electrical wiring modification with mechanical and avionics skills. Certified maintenance actions with valid authorization and released the aircrafts to service at Line Maintenance environment and as Flight Engineer at stations. Observed Aircraft Systems with operational/functional check and real time monitoring in Cockpit and analyzed Fault Messages and diagrams for troubleshooting during maintenance packages or AOG situations. A380/A350 EIS and ageing Aircraft (B747/B767) Maintenance program support experienced.Monitored and oversaw all maintenance works carried by contracted MRO as Customer Technical Representative. Performed inspector activities, technical support and troubleshooting guidance during contracted Base Maintenance.Company fleet: A320/A321, A330-300, A380-800, A350-900, B747-400, B767-300, B777-200, B737-Classic

Monitored compliance with Part-145 approved procedure/quality system and controlled customer/vendor technical library and technical documents.Amended FAR Repair Station RSM/QCM and participated in foreign EASA Part-145 initial approval project. Coordinated external audits by authorities and customers and supported customers for maintenance service evaluation and pre-contract process. B747-400F/SF Line maintenance experienced.