* Participated in Service Development Process (SDP) design & operation (2013)
* Development of service analysis tools and methodology such like a WebQMS (web service quality measurement & analysis system), WebHCS (health check of the real web servers), FMS (Facility Management System, electricity analysis & space usage analysis), DNS log analysis, and so on.
* Successfully supported build of the service redundancy site on Sejong IDC & KT IDC
* Successfully completed a re-build of DNS service architecture w/ GSLB architecture
* Design/Administration of the Core Internet service & server network in Sejong Telecom.