| 2008 | Oracle bv | Oracle best practice Security seminar |
| 2008 | Capgemini | Realistisch Overtuigen |
| 2008 | Oracle bv | Oracle Database 10g: RAC for Administrators |
| 2007 | Oracle bv | Database 11g: New Features Overview Seminar |
| 2007 | Oracle bv | Oracle Database 10g: New Features |
| 2006 | Capgemini | Communicatie Training India |
| 2006 | Oracle bv | Oracle Application Server 10g Administration 1 |
| 2006 | Oracle bv | Oracle database 10g: Implement and Administer Data Warehouse |
| 2006 | Oracle bv | Oracle Applications 11i Install, Patch, and Maintain |
| 2003 | Sybase | London Sybase 12.5 Admin |
| 2003 | Oracle bv | Oracle New Features II (Oracle 8i.) |
| 2001 | Oracle bv | Oracle Database Administrator traject Oracle 8 (SQL, PLSQL, Oracle networking, Backup & Recovery, Performance & Tunning) |