The Oracle Applications DBA position involves a comprehensive understanding of Oracle database and Oracle Applications 11i and R12/R12.2 concepts, architecture, related utilities, and tools. The role requires maintaining and administering Oracle applications in multi-node environments, performing day-to-day administration and troubleshooting of Oracle databases and applications, and managing performance diagnostics and tuning. Responsibilities also include patching Oracle Applications, managing concurrent managers, and maintaining security at both database and application levels.