- Business Leadership Education, LG CNS, South Korea (3 Weeks, 2002)
- Consulting Course, Young Leader Course, and Vision Creation Course
- E-Business Education, LG CNS, South Korea (4 Weeks, 2001)
- e-CRM, e-SCM, e-Business Technology, e-Strategy, Value in e-Business, Internet Marketing, and Law and Regulations
- HP Technology Education, HP Education Center, South Korea (4 Weeks, 2001)
- Fundamental of UNIX, HP-UX System and Network Administration, HP-UX Performance Tuning, and HP-UX Troubleshooting
- Microsoft Technology Education, Microsoft Education Center, South Korea (3 Weeks, 2000)
- System Administration for MS SQL Server, Implementing DB Design on MS SQL Server, and System Administration for MS Exchange Server
- Oracle Technology Education, Oracle Education Center, South Korea (4 Weeks, 1999)
- Oracle Administration, Oracle Backup and Recovery, Oracle Network Administration, and Oracle Performance Tuning