Mahendran Ponnusamy

Led end-to-end migration of six PeopleSoft (Finance & Procurement) applications from on-premises Exadata to Oracle Cloud Infrastructure. Coordinated multiple cross-functional squads across application development/support, IAM, infrastructure, and DevOps. Managed migration roadmap, dependencies, delivery governance, risks/escalations, and stakeholder reporting. Coordinated IAM/AAD/MFA integration with security control compliance, assessed cloud risk and business impact, and managed vendor relationships including Oracle/Microsoft. Oversaw DR testing, penetration testing, UAT, production readiness, and created go-live runbooks and operational readiness checklists with aftercare.

Acted as single point of contact for Oracle Exadata migration from on-premises to private cloud, working with program managers on timelines and delivery execution. Coordinated cross-tribe integration for cloud/database solutions and provided chapter leadership: defined roadmaps, introduced standards, recruited members. Partnered with risk/audit teams for vulnerability mitigation and compliance. Hands-on DBA work on Exadata including ASM instance creation and Oracle GoldenGate replication with zero-downtime and bi-directional replication, automated via shell scripts. Performed SQL monitoring and performance tuning.

Provided day-to-day database monitoring and performance diagnostics. Fine-tuned database optimization using AWR/ADDM/ASH, supported reliability and continuity, resolved RMAN flash recovery space issues, and participated in daily handover discussions and operational alignment.