Extensive knowledge on database administration for 11g,12c and 19c, with experience in very large scale database environment and mission critical large OLTP and OLAP systems. Good experience in writing/editing batch/shell scripts. Setup Oracle Enterprise Manager (OEM)for database monitoring/performance/diagnostics. Experience in performance tuning using EXPLAIN PLAN, SQLTRACE, TKPROF, STATSPACK, AWR and ADDM. Extensive experience in database backups RMAN (full/incremental backups) and in traditional hot/cold backups. Developing and maintaining databases, ensuring data security, tuning performance, backing up data, and providing training and support to users. Responsible for the performance, integrity and security of databases.