An Oracle DBA (Database Administrator) ensures the integrity, security, and performance of Oracle databases within an organization. Key responsibilities include installation, configuration, backup, recovery, and performance tuning. Essential skills include proficiency in SQL, PL/SQL, and performance monitoring tools. Typically working in IT departments, Oracle DBAs collaborate with developers, system admins, and data analysts. Career progression may lead to roles like Database Architect or IT Manager, with growth opportunities in cloud database management and big data analytics.