Ramachandran Kittu

• Fixed-scope migration engagement: Migrated 20+ Oracle 19c databases, with the largest database at 25 TB in size, from AWS RDS Custom RAC to Exadata X11M two-node RAC under Oracle Database@AWS, using DR standby-based cutover. • Configured DR standby databases; implemented encryption using TDE, SSL/TLS. • Automated DR lag monitoring and DR testing using Bash shell scripting for threshold-based lag alerts and DR drills aligned to RPO/RTO, reducing DR drill time from 2 hours to 15 minutes.

• Fixed-scope migration engagement: Led migration of 40+ Oracle 19c databases, with the largest database at 80 TB in size, from Exadata X5 to ExaCC X10M two-node RAC, assigning Data Guard or Data Pump to each database according to its size and available downtime window. • Built Data Guard standby configurations for DR and documented the migration and DR process as reusable SOPs.

• Fixed-scope migration engagement: Migrated 30+ Oracle 19c databases, with the largest database at 60 TB in size, from Exadata X7 to ExaCC X10M two-node RAC, chose between Data Guard and Data Pump on a per-database basis, driven by data volume and the downtime each application could absorb. • Set up Data Guard standby for DR and captured migration and recovery steps in standardized documentation.

• Fixed-scope migration engagement: Moved 40+ Oracle 19c databases, with the largest database at 30 TB in size, from Exadata X7 to ExaCC X9M four-node RAC target, applying Data Guard, GoldenGate, or Data Pump depending on database size and the downtime permitted. • Modernized 20+ Oracle GoldenGate 19c replication paths from Classic to Microservices architecture. • Established Data Guard standby for DR and produced SOPs covering migration, DR, and replication.

• Upgraded Oracle 12c databases to 19c and applied quarterly patches across GRID, Database, and Datapatch layers. • Monitored and troubleshot GoldenGate replication and Data Guard standby on Oracle 19c databases; handled backup and recovery with RMAN and Data Pump. • Improved query response times through SQL analysis and execution plan optimization. • Supported 24/7 production operations across shift and weekend on-call rotations.

• Led a team of 10+ DBAs delivering Oracle 12c to 19c upgrades and quarterly patching. • Tuned SQL and instance-level performance to reduce query response times and improve overall system efficiency. • Managed backup and recovery operations using RMAN and Oracle Data Pump.

• Executed Oracle 11g to 12c upgrades and applied quarterly patches. • Diagnosed and resolved performance bottlenecks through SQL tuning and database configuration changes. • Serviced backup, restore, and data refresh requests using RMAN and Data Pump.

• Led a team of 15+ DBAs delivering an Oracle 12c upgradation and migration project. • Upgraded Oracle 11g databases to 12c and migrated 12c databases from Non-CDB to Multitenant (CDB/PDB). • Coordinated with application teams to align migration schedules and minimize business disruption.

• Upgraded Oracle databases from 10g to 11g; applied quarterly patches. • Configured Data Guard standby for Oracle 11g databases; handled data refreshes with expdp/impdp. • Optimized storage utilization and reduced database segment fragmentation through data reorganization using Oracle Data Pump and Segment Shrink operations.

• Upgraded Oracle databases from 9i to 10g; supported Oracle database operations. • Migrated Oracle databases across data centres, ensuring availability and operational continuity. • Supported application schema administration, including user/schema account creation, privilege management, administration of application objects, and handled data refresh requests using exp/imp.