Roles and Responsibilities: Creating Rollback Segments with necessary storage requirements.Assigning large rollback segments for long running job scripts.Managing Cold and Hot Backups, database exports and imports & perform database maintenance.Reorganized the tables and rebuilded indexes to improve space utilization.As a DBA, Installed and configured Oracle Database and configured client machines.Managing the User quota over User default tablespace and temporary tablespace.User training to backup the database.Logical backups using Export and Import utilities.Weekly physical backup of whole database.Backing up Control files whenever a change made to database.Cloned the Production Database for testing purpose.Implemented Standby for Disaster Recovery.Creating, Managing and Monitoring the Oracle Databases.Configuring networking files like listener and tnsnames.Performing block level backups using RMAN.Database Up-gradation from version 9.2.0.4 to 9.2.0.8 and 10.2.0.1 to 10.2.0.4 etcMigration of Database from Oracle 9i to 10g.Critical Patch update for a live database.Day to day activity for space and RMAN backup monitoring.Checking ALERT logs to know types of errors recorded during the day if any, and rising to counter them.Creation and Maintenance of Oracle databases as per the specification provided by Application team, taking care of disk space, memory and other available resources.