Nov 2024 – Mar 2025 · 4 mos · Singapore · On-site

• In my current role, I report to the Vice President of Corporate Technology Support within the Corporate IT department. I lead the Database & Middleware Services team, focusing on providing robust support for Databases, Middleware, Platforms, and Global Corporate Services Applications. My responsibilities align with Visa’s 2030 vision and strategic imperatives, ensuring operational excellence, driving innovation, and supporting the organization’s broader objectives.

Jul 2023 – Nov 2024 · 1 yr 4 mos · Singapore · On-site

• Reporting to the Vice President of Corporate Applications and Intelligence (CAI), I lead the sub-organization of Corporate Platform Engineering (CPE) for the Asia Pacific and US region. My role focuses on boosting Visa’s collaboration, engagement, and productivity through securing, simplifying, and modernizing over 50 applications across Finance, Legal & Compliance, Data Platform, and Global Corporate Services. By providing continuous L2, L3, ProdOps, ATC, and Automation services for databases, middleware, applications, and platforms, we enable the business to focus on their purpose. Our strength lies in our quick adaptability to any technologies, ensuring our products and services meet evolving business needs with excellence.

May 2019 – Jun 2023 · 4 yrs 1 mo · Singapore · On-site

• Leading and managing a team of Database and Middleware administrators in supporting the operation of applications in a highly complex and regulated environment
• Managing development, deployment and management of next generation database platforms for analytics, decision making and activity monitoring
• Owns and handle escalations related to Database and Middleware infrastructure issues, changes, incidents and problems
• Perform strategic planning, design and implementation of architectures for assigned projects and align across all portfolios
• Responsible for end-to-end delivery of all Database & Middleware implementations, upgrades, production support and process improvements in the Corporate IT department
• Responsible for evaluating, implementing and oversee adoption the of latest technologies in Database & Middleware that align technology investment with business

Oct 2017 – Apr 2019 · 1 yr 6 mos · Singapore · On-site

• Leading a small group of DBA's and Middleware administrators
• Managing multiple Oracle, Actimize, Denodo, Collibra and Robotics Automation Process projects involving installations, upgrades, developments and production support
• Working on handful of projects requiring advance Oracle skills, Performance tuning and infrastructure migrations
• Responsible for conducting real time DR testing for all environments we support to adhere DR requirements
• Responsible for interfacing, communicating and collaborating with client stakeholders, system architects, system engineers and software engineers to establish a clearly defined and comprehensive view of all data and relationships necessary to support the systems.
• Recognized as a Subject Matter Expert (SME) in Oracle database administration

May 2012 – Sep 2017 · 5 yrs 4 mos · Singapore · On-site

• Responsibilities:
• Extensive experience in mission-critical and 24/7 support of Oracle database 11.x/Oracle EBS 12.1.x
• Provides technical recommendations and support on all the stages of Oracle database Architecture, Implementation and/or database related operational support.
• Designing, Installing, upgrading, administering, monitoring, patching and cloning Oracle EBS 11.x/12.1.x, and related Oracle 9i/10g/11gR2 databases in RAC and non-RAC environments.
• Extensive experience and expertise in deploying and supporting Oracle EBS, Oracle GRC, Oracle OBIEE and Oracle Hyperion environments and Oracle WLS in Linux and Solaris environments
• Involved in upgrade of 11.5.10.2 to R12.1.3 along with the upgrade of RAC Database, Implementation of OAM 11.1.2 for SSO, Implementation of Oracle GRC and Implementation of SOA components
• Handles all corporate Oracle Product installations and maintenance
• Complies all Oracle Installation as per corporate standards
• Experienced in the use of RapidClone, Autoconfig and AD utilities and high availability techniques in Oracle EBS environments
• Designed and Implemented disaster recovery plans for Oracle databases
• Always takes ownership on Senior DBA responsibilities and lead by example
• Managing and administering Dataware House global environments as large as 7TB on Oracle Exadata machine with 4 Node RAC and 4 Node Physical standby’s

Jun 2010 – May 2012 · 1 yr 11 mos · Singapore

• Client: OCBC Bank and Sentosa Development Corporation
• Responsibilties:
• Prepared plan for the database upgrade and OFSA Upgrade from 8.1.7.4 and 4.5.20 to 10.2.0.5 and 4.5.39 respectively
• Converted the database to 64 Bit and upgraded the database to 10.2.0.5 in the Solaris sparc 5.10
• Conducted load tests, created AWR baselines and optimized the OFSA Apps
• Regular PSU Patching and OFSA Apps patching
• Writing UNIX shell scripts for automation of processes in Cron tab
• User security management by creating users, assigning roles and profiles to users
• Involved in the RAID Setup for the database storage
• Actively participated with project management team in strategic planning, goal setting and monitoring, providing status updates on a regular basis.
• Aggressively ensured Service Level Agreements (SLA) goals are successfully met by DBA team
• Installed the EBS R12.1.1
• Worked with network/storage admin and identified the requirements for installing clusterware components, RAW Devices, ASM and Oracle RAC Software
• Upgraded the OracleAS forms/reports and OracleAS 10g to 10.1.2.3.1 and 10.1.3.5 respectively
• Worked with Oracle Support Services through SR's for the issue and bug fixes
• Created document for installation, startup/shutdown, patching, upgrade, cloning and regular maintenance activities for R12 RAC Applications
• Troubleshooted the issues raised during the installation, RAC Conversion, Load balancer setup and support

Dec 2006 – May 2010 · 3 yrs 5 mos · Chennai Area, India

• Clients: Ames True Temper, Tikona Digital Networks, Maveric Systems and New York Blower
• Responsibilities:
• Cloning/Refreshing Oracle Applications
• Cloning RAC databases to single node and vice versa
• Maintained and developed backup/recovery process for Oracle EBS Suite installs, for online and offline backups and disaster recovery
• Patch Application on multi nodes for different modules using AD Utilities, troubleshooting application related issues
• Troubleshoot problems with concurrent managers, Apache, Jserv processes, and database performance
• Work with Oracle Support’s Service Request if necessary to bring problems to a successful resolution.
• Upgraded the JInitiator, JRE and JDK in Oracle EBS Suite
• Worked with the Oracle Support Diagnostics tools.
• Maintenance includes configuring printer setup, adding users, creating user defined functions, menus, responsibilities to satisfy the basic business needs
• Upgraded the EM Repositories, OMS and Agents from 10.1 patchsets to 10.2 patchsets
• Installed Maintenance Wizards, Application Management packs 1.0 and 2.0 and integrated Oracle Application Manager with Oracle Enterprise Manager
• Upgraded the 11.5.10.2 to 12.0.4 on the test box with RAC and LVS as load balancer for the upgrade preparation
• Cloned the RAC to RAC,RAC to Non-RAC (ASM to Local file system) databases
• Created document for patching, upgrade, cloning and regular maintenance activities for RAC/Standby
• Converted ASM File system to Local file system and vice-versa for the Oracle Database storage using RMAN
• Have good knowledge on the physical RAC setups (Public ip's, Private ip's, Virtual ip's, Voting Disks and CRS), DG Redo transport services, Redo Apply and role transitions
• Integrated/collaborated with application development and support teams on various IT projects
• Supported all non-production databases including installation, upgrade, backup, recovery, database refresh, and multi-language support

Dec 2005 – Nov 2006 · 11 mos · Coimbatore Area, India

• Installed Oracle EBS Release 11.5.x in a single node configuration using Rapidwiz Cloning instances
• Added Custom products to the E-Biz Suite
• Checking backup status to ensure validity
• Registered Concurrent programs and applications
• Setting System and User Profile Values
• Performed Oracle Apps 11.5.9 System administrator tasks
• Created tablespace for custom based user data tables and indexes
• Created of Database links and registered them in Oracle Apps
• Enrolling users, maintaining system security, controlling, monitoring user access to the database.
• Documenting the database activities and other configuration details
• Maintained/administered Oracle EBS systems