The document describes the role and responsibilities of a Senior Oracle DBA working at Lanco Global Systems Ltd. and GENPACT from April 2006 to January 2008. Key responsibilities included installing and upgrading Oracle databases across different versions and platforms, performing backups, monitoring database and user performance, troubleshooting issues, and conducting database maintenance, upgrades and reorganizations. The DBA worked with Oracle versions 7 through 10g on HP-UX, Solaris, Linux and Windows environments.