Mainak_Resume

MAINAK GHOSH Email: [email protected] Mobile: +1 614-822-7064

PROFESSIONAL SUMMARY:

• Having 8.5+ years of IT experience in Oracle Database Administration on various operating systems including UNIX/LINUX and Windows environments.

• Expertise includes Oracle installation, Upgrades, Quarterly PSU patching, Migrations of high volume OLTP and OLAP databases.

• Oracle APEX configured for reporting.• Performed Full range Oracle DBA activities like monitoring of mission critical databases, troubleshooting perfor-

mance issues, Backup and Recovery, Database tuning, Capacity planning, Code changes and Break fix manage-ment and other production support and documentation.

• Proficient in Oracle High Availability features like RAC, DATA GUARD, GRID CONTROL and Oracle Perfor-mance Tuning Utilities like I3 precise, ADDM, AWR, ASH, SQL-Tuning Advisor, EXPLAIN PLAN, TK PROF, RDA and DBVerify.

• Oracle RAC Database Administration including Installation, Configuration, Analysis, daily administration, Backup and Recovery.

• Experienced with tools/utilities: OEM, RMAN, Statspack, TOAD, SQL Developer and SQL* Loader, Data Pump (expdp/impdp).

• Change/Incident/Problem management ticketing tool like Remedy, ICCM and RequestIT. Worked on RBAC en-vironment.

• Experienced on several version control tools like Stats, VSS, Subversion, Clearcase and Serengeti.• Proficiency in Disk management and problem resolving techniques with a good understanding of capacity plan-

ning and efficient usage of disk space.• Extensive experience in configuring DATA GUARD and RAC on UNIX/LINUX environments for High Availability

with ASM (Automatic Storage management) and storage on EMC SAN BCV techniques and VERITAS cluster.• Extensive experience on Oracle List and Range Partitioning.• Extensive performance tuning activities like Operating system Tuning, SQL Tuning, and Database/Instance Tun-

ing.• Worked as a primary support for database related issues with clients.• Experienced in monitoring and setting up of RMAN environment on various platforms for TAPE backup and

scheduling backup jobs using Oracle Enterprise manager Grid Control.• Experience in implementation of enterprise databases on enterprise storage solutions and storage area networks

(SAN).• Knowledge of the Oracle Golden Gate installation, configuration, troubleshooting GG issues and Oracle materi-

alized views.• Certified Pega system Architect 7.1. Knowledgable in case management, BIX implementation, Service levels

Integrations.• Data warehouse management and design.• Experience in user error recovery methods like Oracle Flashback.• Setup, Configured and Maintained Oracle Data Guard to control Primary and Standby Databases and ensure

Disaster Recovery using various data protection modes.• Basic knowledge of SSIS package deployment in MS SQL SERVER. • Strong PL/SQL programming and UNIX shell scripting.• Have experience on Oracle Fusion Middleware and Oracle Developer suite.• Efficient in communicating and coordinating with other groups during implementation of change.• Efficient coordination between onsite expectation and offshore deliveries.• Successful in Providing 24x7 On-call Support for Production databases.

mailto:[email protected]


EDUCATION & CERTIFICATIONS:

• Bachelors in Computer Science from R.G.PV.

• Oracle certified associate.

• ITIL v3 foundation.

SKILLS:

Operating Systems: Sun Solaris 8/9/10, LINUX (RHEL/Oracle AS 4.x/5.x), HP-UX 10.x/11.x & Windows Server 2008/2003/2000/NT

RDBMS: Oracle 12c/11g/10g/9i, SQL Server 2008/2000, MySQLLanguages: SQL, PL/SQL, UNIX shell scripting, MS DOS Batch script, C/C++Tools/Utilities: RMAN, OEM 10g/11g/12C, TOAD, Putty, SQL Developer, SQL*Loader, EXP/IMP, Data pump

Utilities, Hummingbird, XMing, I3 precise, SQL Server Management Studio

PROFESSIONAL EXPERIENCE:

CapitalOne - VAOct, 2015 – till datePosition: Oracle DBA

Environment: Oracle 11g, OEM Cloud Control 12C, Linux, AWS, PostgreSQL, SQL SERVER.

Responsibilities:• Providing DBA assistance to application team.• Administering oracle, PostgreSQL (AWS) and SQL SERVER databases.• Managing AWS EC2 and RDS instances via chef scripting.• Administering sauce lab tunnels for testing.• Worked for Incident & Problem Management and Change Release Management to meet business SLAs (Ser-

vice Level Agreement).

Associated Bank, Green Bay - WIMar, 2015 – Jun, 2015Position: Oracle DBA

Environment: Oracle 11g, OEM Cloud Control 12C, RMAN, Linux, SQL DEVELOPER, ASM, Serengeti.

Responsibilities:• Code deployment and providing DBA assistance to application team.• Convert List partition to Range partition with coordinating with client.



• Compare and resolve schema differences between several environments.• Managing and freeing up unused space by reorganizing indexes.• Monitoring and managing RMAN backups scheduled through OEM.• Managing ASM instance for 11gr2 grid infrastructure.• Worked on Version control tool Serengeti.• Worked for Incident & Problem Management and Change Release Management to meet business SLAs (Ser-

vice Level Agreement).• Supported Oracle application express (APEX) on 11g r2 for reporting application.• Did load capture in Oracle RAT for specific instance to troubleshoot performance issue.

John Wiley and Sons, Somerset - NJAug, 2014 – Feb, 2015Position: Oracle DBA

Environment: Oracle 9i/10g/11g/12c, MS SQL Server 2005/2008/2008 R2, OEM Cloud Control 12C, RMAN, Data-Guard, Linux RHEL 4.x/5.x, Windows, Sun Solaris, HP-UX, TOAD, Shell Scripting, PL/SQL, ASM.

Responsibilities:• Installed, configured and maintained Oracle 11g/12c Databases on Linux Platforms using Oracle Universal In-

staller.• Successfully implemented DR test physical standby database using Oracle Data Guard feature for High availabil-

ity configuration.• Setup and maintain RMAN backup and recovery strategy for oracle Databases.• Worked on Oracle 9i to 10g/11g migration projects with low maintenance window and applied patches to vari-

ous databases.• Worked on OEM Grid Control 11g, scheduling and troubleshooting OEM jobs and deploying OEM agents.

Scheduling Backup Jobs and troubleshooting failed jobs through OEM GC.• Worked for Incident & Problem Management and Change Release Management to meet business SLAs (Ser-

vice Level Agreement) using ICCM.• Monitored the Performance of the migrated databases using grid Control and features AWR, ADDM, ASH and

generated the reports for metric collection and health check of the databases.• Created, Upgraded using DBUA, and Cloned using RMAN Oracle databases for Development and testing

databases.• Performance Tuning i.e. tuning applications, shared pool, I/O distribution, rollback segments, buffer cache, redo

mechanisms.• Performed Databases Refresh and Schema level refresh as per the User request from Production to UAT and

DEV Environments for testing Purpose’s.• L0 DBA for My SQL DBs.• 24X7 production support and on call rotation

Hartford Insurance Group, Hartford - CTFrom Jun-2010 – Aug-2014Position: Senior Oracle DBA

Environment: Oracle 9i/10g/11g, TOAD, Oracle Enterprise Manager (OEM), RMAN, RAC, Data Guard, Grid Control, RHEL, Windows, Sun Solaris.

Responsibilities:

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• Setup and maintenance of DATA GUARD on 9i, 10g, 11g for Disaster Recovery and reporting purpose with vari-ous modes. Developing methodology to create logical-standby configuration with help of RMAN clone.

• Setting up schedule RMAN Backup using DBMS_SCHEDULER and CRONTAB.• Performing DB code changes on SOX AUDIT compliance databases.• Worked on Change management tool Remedy 7, RequestIT and RBAC.• Supported Oracle application express (APEX) on 11g r2 for reporting application.• Database performance monitoring, Application performance monitoring, tuning database and application with

efficient database parameters.• Managed Oracle Net Configuration, monitoring Alert Log Files, Listener Log, Redo Log status, and Trace files

for the database.• OPatch Oracle RAC systems.• Creating automate scripts to take backup of database by RMAN, imp/exp at data file and user level. Restore of

database by script. Recovery of full database by applying archive and redo logs.• Frequently Monitored the database level parameters for performance issues and tuned SGA, Optimizing SQL

Queries using CBO, and analyzing stats pack and explain plan reports.• Perform capacity planning required to create and maintain database environments.• Created database links to retrieve data from multiple servers.• Wrote procedures, triggers in PL/SQL and shell scripts.• Writing SQL and SHELL scripts for monitoring database. Atomization of database maintenance using OEM,

SHELL scripts. Configure alert, thresholds, matrices and email in OEM.• Oracle VLDB features like partitioning.• Data Warehouse Managing and design.• Used I3 precise for SQL tuning and monitoring DB server statistics.• Worked on Stats, VSS, Subversion and Clearcase version control tools. • Monitored Schema level performance issues and performed the tasks like analyzing tables, rebuilding indexes

and gathering Stats on a timely basis• Data refreshes using export/import as well as data pump jobs, monthly partition maintenance like truncating parti-

tions and adding new partitions.• Maintained cluster servers to provide high availability.• Responsible for data integrity and concurrent data, locks and deadlocks.• General DBA activities like user, roles, privilege, and management on Oracle Exadata. • Successful in providing 24/7 support for production, development, and test database.

Product alliance group, IndiaMar-2007 – Jun-2010Position: Oracle Database Administrator

Environment: Oracle 8i/9i/10g, Oracle Enterprise Manager (OEM), RMAN, IBM AIX, HP-UX, RHEL, RAC, Data Guard, SQL*Plus, Oracle Fusion Middleware and Oracle Developer Suite.

Responsibilities:• Evaluating, Supervise, plan, Installing Database servers, Database software, upgrading to new versions, co-

ordinating with hardware changes and applying database patches. • Planned backup and Recovery Strategies and Performed Backup and Recovery activities (Archive log Mode

and No Archive log Mode) using RMAN, DATAPUMP, EXP/IMP Utilities.• Configuring Golden gate to ensure data protection and disaster recovery for enterprise data.• Define Database level authentication and OS level authentication using password file and User Profile.



• Intensively used latest 10g Automatic Workload Repository (AWR) & Automatic Database Diagnostic Moni-toring (ADDM) reports for the health check of the databases, and used the notification tool to send the alerts in OEM Grid Control.

• Statspack, SQL-Tuning Advisor, EXPLAIN PLAN, TK PROF, RDA and DBVerify were used for various cases.• Installation/configuration of Oracle RAC 10g over raw file system.• Intensively used OEM Grid Control Diagnostic and tuning packs to tune the application and SQL queries.• Implemented Oracle range/list partitions to improve database performances.• Implemented Materialized views to replicate data from OLTP database into datawarehouse.• Creation of users, schemas, tablespaces and other database objects. Managing resources via OEM, GRID.• Refreshing/Cloning of databases from production to Dev & QA Databases.• Worked on transparent data encryption on tables using wallet.• Have exposure on Oracle identity management for internet directory.• Installed and migrated oracle forms and reports from 6i to 10g, worked on developer suite.• Java environment configuration was done and Jar, ear files were deployed over fusion middleware – WebLogic

server.• Worked on DBs running on VERITAS cluster and net backups.• Worked on apache server.• 24/7 support for production, development, and test database.


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Mainak_Resume