- 1997, As a junior programmer in develop Multifinance System Application in PT. Dipo Star Finance with Oracle Developer 2000 for 1 year

- 1998, As a Analyst Programmer in develop Data warehouse Application in Bank Danamon for 3 months

- 1999, As a Senior programmer on develop Sistem Aplikasi Pelabuhan in Pelindo I, Medan for 1 year
- 2001, As a DBA on Implementing Oracle8i Parallel Server on 2 node IBM server with HACMP.
- 2002, As a DBA on implementing Oracle9i RAC for 2 node Sun server at PT. EDI Indonesia.
- 2002, as a DBA on setting multi master replication on 3 sites in Bank Indonesia.
-2003, as a DBA on Implementing Oracle9i RAC for 2 node Sun server at Ditjen Pajak.
- 2003, as a DBA on implementing Oracle9i RAC for INTEL based with 2 node HP server.