Mahendran Varadharajan, Senior Oracle Application DBA

Mahendran Varadharajan

Senior Oracle Application DBA

DRAGON OIL

Location
United Arab Emirates - Dubai
Education
Bachelor's degree, Electronics & Communication, Computer Science
Experience
19 years, 4 Months

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Work Experience

Total years of experience :19 years, 4 Months

Senior Oracle Application DBA at DRAGON OIL
  • United Arab Emirates - Dubai
  • My current job since November 2014

TECHNOLOGY
- Installation/Upgrade/Implementation/Support of Oracle Apps 11i/R12
- Oracle Applications Performance Tuning.
- Oracle database upgrades
- DR setups for DB and Oracle Applications.
- DMZ setup for customers.
- SSL configuration.
- RAC configuration.
- Applying Critical Patch Updates
- Cloning Oracle Applications using RMAN/ASM/Cold backups.
- Oracle Applications Database Health Check.
- Oracle Applications Backup & Recovery.
- Oracle Applications High Availability.
- Oracle Applications Diagnostics / Troubleshooting.
- Supporting on- going projects for client (Migration of hardware, up gradation etc.)
- Designing Backup Strategy. Use of RMAN, Conventional Backups
- RMAN setup
- Formulating backup policies, security policies, patch protocols, clone protocols.
- Configuring Oracle Apps 11i/R12 with RAC & PCP.
- Creating SOP for all the work for documentation purpose.
- Oracle Knowledge Base (Oracle Database9i, 10g, 11g/Oracle Apps 11i/R12)
- Single Node and Multi Node Installation - 11i/R12.
- Oracle Applications Architecture - File System and Database Entities.
- Maintenance of Single Node and Multi Node Instances.
- AD Utilities.
- Upgrades of various Oracle Applications versions to 11.5.10, 11.5.10.1 and 11.5.10.2.
- Upgrades of various Oracle Applications 11i releases to R12.
- Data Install and HR Global patch
- Applying patches - Oracle Applications and Database patches
- Cloning Oracle Applications
- Oracle Apps Platform Migration
- Single Node to Multi Node Cloning - Splitting servers across nodes
- Oracle Apps SYSADMIN functions.
- Installing Oracle Database 9i, 10g
- Creating Database
- Upgrading Databases
- Applying Patches
- Export/Import of DB
- Data pump Import/Export of DB
- Hot and Cold Backups
- Script development
- RMAN
- RAC
- ASM
- DR Setup
- BEA, TIBCO, Model- N and Hyperion, SSO, OID, Business Objects (BO), REIM, SIM

PROJECT MANAGEMENT
- Vendor Management Engagements on SOP’s, SOW’s, PUGH matrix etc.,
- Project Leadership for the entire GE global research database associates projects
- Managed 15 members of DBA team includes Sr. DBA’s with 6000 customers at site
- Provided 24 x 5 DBA support model to work with 300 consultants from various functions
- Incident Handling Methodology
- SLA based approach model
- Ticket trend analyse methodology
- Work out Six-Sigma Green Belt methodology
- Worked on Remote vendor program engagements
- Global team engagements in Decision making, Understanding the project scope in / out to allocate the right resource and ensure with the timelines

Senior Oracle Apps DBA at Abu Dhabi Tourism Authority & Cultural Heritage
  • United Arab Emirates - Dubai
  • November 2012 to November 2014

- Handling 11g / 12c Oracle Database Administration and R12 Oracle Apps DBA
- Working with key users of HRMS / FINANCE / SOURCING to handle day-to-day issues.
- Maintained Oracle database and Retek Database like REIM, SIM
- Handling data ware house database for Business Objects (BO)
- Sizing the servers for the upgrade projects
- Handling UC4 job scheduler

Senior Oracle Apps DBA at Marvel Semiconductors
  • India - Bengaluru
  • December 2010 to June 2012

- Implement 11g OEM
- Installation of BEA
- Implementing the client agents of 11g
- Implemented TIBCO 5.9 version on Solaris platform
- Supported TIBCO 5.9 version on Solaris platform

Senior oracle Apps DBA at General Electric
  • India - Bengaluru
  • February 2008 to December 2010

- Consolidation of 150 database servers to 20 database servers
- Analysing and finding the database servers for the consolidation
- Migrate and upgrade the databases into 11g databases on Linux platforms
- Setting up the backup strategy on all the databases.
- Migration of Sql Server database to Oracle database
- Database upgrades from oracle8 to Oracle 11g
- Implementing Symantec backup strategy to Oracle database

Oracle Apps DBA at Oracle
  • India - Bengaluru
  • June 2006 to February 2008

- Upgrade R11.5.9 to R11.5.10.2 & R12 Oracle Applications -- BOU (Bank of Uganda) Uganda, Africa
- Database upgrades 8i to 11g
- System Administration
- Environment preparations
- Upgrade Oracle Application to R11.5.10.2, R12
- Patching and Troubleshooting
- Database Backup Activity
- Upgrade R11.0.3 to R11.5.10.2 Oracle Applications -- NATO, Belgium
- Database upgrades 8i to 11g
- System Administration
- Environment preparations
- Upgrade Oracle Application to R11.5.10
- Patching and Troubleshooting
- Implementing RMAN backup strategy for the client
- Upgrade R11.0.3 to R11.5.10.2 Oracle Applications -- Pacific National, Australia
- Database upgrades 8i to 10g
- System Administration
- Environment preparations
- Upgrade Oracle Application to R11.5.10
- Patching and Troubleshooting
- Database Backup Activity.
- Single node to multi node conversion

Trainer at IIHT
  • India - Bengaluru
  • June 2004 to February 2006

COMPANY Freelance Trainer
Location Bangalore, India
Client Oracle, IBM, IIHT, NIIT
Role Oracle Database Administration Trainer
Duration Jun 2004 - Feb 2006

- Oracle 9i Database training
- Oracle 10g Database training
- Oracle 9i RAC Database training
- Oracle 10g Database training
- Undergone 10G / 11G New Features Training from Oracle Corp.,
- Undergone Oracle APPS DBA 11i & R12 training from Oracle Corp.,
- Undergone Six-Sigma GB Certification Training from GE Corporate
- Undergone GE Presentation Program Skill training from GE Corporate
- Undergone GE Team Building workshop from GE Corporate. Etc.

Education

Bachelor's degree, Electronics & Communication, Computer Science
  • at PGP Engineering College
  • May 2004

Bachelor of Engineering in Electronics & Communication, Computer Science, PGP Engineering college from Periyar university. Additional Course: courses: OCP (Oracle Certified Professional) Six-Sigma (Green Belt) Certified

Specialties & Skills

Database Servers
Oracle Database
Databases
Oracle RAC
Oracle ERP
Oracle Application DBA
Oracle DBA
Oracle Database Architect
Linux Administrator
Solaris Administrator

Languages

English
Expert
Hindi
Intermediate
Tamil
Expert
Kannada
Expert

Training and Certifications

Oracle Certified Professional - Database Administration (Certificate)
Date Attended:
June 2004
Valid Until:
January 9999
ITIL Training (Training)
Training Institute:
Abu Dhabi Tourism Authority
Date Attended:
January 2014
Duration:
40 hours
Green Belt Certified - Six Sigma (Certificate)
Date Attended:
December 2008
Valid Until:
January 9999
Oracle Application DBA (Training)
Training Institute:
Oracle
Date Attended:
June 2006
Duration:
120 hours