The Oracle DBA will be responsible for installing, configuring, and upgrading Oracle Database software. They will optimize database performance, design and implement backup and recovery strategies, and manage security measures. The DBA will also apply patches, configure high availability solutions, write and optimize SQL and PL/SQL queries, and plan and execute upgrades. Additionally, they will configure and manage Data Guard and GoldenGate, perform database cloning, plan for database capacity, diagnose and resolve issues, utilize Oracle Enterprise Manager, collaborate with teams, and maintain documentation. The role involves a wide range of responsibilities centered around ensuring the stability, security, and optimal performance of Oracle databases.