Harsha S

Principal Oracle Database Administrator (DBA) and Exadata Database Machine Administrator (DMA) with 18 years of experience supporting mission-critical environments across on-premises, Oracle Cloud Infrastructure (OCI), and Oracle Cloud@Customer. Deep expertise in Exadata administration, proactive monitoring and lifecycle patching - delivering 99.9%+ availability. Results-driven team lead who drives operational excellence through automation, standardized runbooks, and workflow optimization while mentoring junior DBAs to improve on-call readiness and execution quality.

Exadata DBA / Site Reliability Engineer (SRE) - ExaDB Cloud@Customer (X8-X11M) - Oracle India Pvt. Ltd.

(2024-02 - 2026-04)

• Achieved 95% QMR/SMR patch success rate across a 3,500+ rack, 100+ customer ExaDB Cloud@Customer fleet by leading end-to-end execution of Dom0 upgrades, storage and OS updates, ILOM firmware refreshes, RoCE switch upgrades, and monthly security patching - triaging failures in real time, driving RCA to closure, and resuming maintenance within approved windows.
• Reduced run-day risk and unplanned downtime for 100+ customers by building and enforcing customer-aligned maintenance schedules, target-version compliance tracking, and structured go/no-go communications based on proactive infrastructure pre-checks - enabling predictable, low-surprise execution within approved windows.
• Accelerated patch quality and platform stability by validating SMR/QMR bundles in isolated test environments and providing formal release sign-off - partnering with Development and Sustaining Engineering to drive bug fixes and raise operability enhancement requests that improved Cloud UI efficiency for subsequent patch cycles.
• Led high-visibility escalations for security and critical patch releases by coordinating cross-functional teams and owning direct customer communications - resolving issues within SLA and maintaining customer confidence during complex DomU OS and Control Plane Service (CPS) upgrade events.
• Partnered with Development/Sustaining Engineering to drive bug fixes for issues encountered during QMR/SMR execution and raised enhancement requests to improve Cloud UI operability and maintenance efficiency.

Oracle Exadata Database Machine Administrator (DMA) - NatWest Group

(2015-07 - 2024-02)

• Maintained SLA compliance for 40 mission-critical Oracle databases averaging 30TB supporting banking applications on 8-node production RAC clusters through 24x7 on-call operations, disciplined ITSM change governance, and structured weekend change execution - sustaining availability targets in a zero-tolerance regulated financial services environment.
• Minimized business impact during Exadata full-stack upgrades across 8-node production and 4-node DEV/TEST RAC clusters by selecting rolling vs. non-rolling patching strategies based on cluster topology and business maintenance windows - standardizing pre/post validation checklists that measurably reduced rework incidents and repeat escalations.
• Reduced RCA cycle time on Exadata hardware and database incidents by owning ExaChk/Trace File Analyzer (TFA)-based health diagnostics and RMAN-based backup/recovery and refresh/cloning operations - improving audit readiness and accelerating fault isolation across a globally shared-pool customer model.
• Cut operational effort and repeat incidents by leading process improvement initiatives that standardized runbooks and tightened change controls - delivering measurable reductions in unplanned work and increasing team execution confidence across maintenance events.

Oracle Exadata DBA - Oracle Managed Cloud Services (OMCS) Exadata - Oracle India Pvt. Ltd.

(2010-06 - 2015-06)

• Delivered 24x7 production DBA support for global enterprise customers in a shared-pool managed services model - sustaining availability and SLA compliance through on-call operations, disciplined change governance, and coordinated cross-team maintenance and customer communication for on-time, high-quality delivery.
• Administered Oracle RAC/ASM and Exadata hardware including ILOM diagnostics and hardware component replacements - reducing MTTR and improving platform reliability for mission-critical customer workloads.
• Supported Oracle E-Business Suite (EBS) 11i/R12 Applications DBA activities as needed - broadening functional scope and enabling seamless coverage across database and applications layers within the shared services model.

Oracle Applications DBA - Inatech Infosolutions

(2008-02 - 2010-06)

• Supported Oracle EBS 11i/R12 environments including patching, cloning, and configuration management - building foundational Oracle DBA skills across database administration, performance monitoring, and backup/recovery operations.

Master of Computer Applications (MCA) - Computer Applications - AMC Engineering College, Visvesvaraya Technological University (VTU)

Bachelor of Computer Applications (BCA) - Computer Applications - Vivekananda Degree College, Bangalore University (BU)