Responsibilities: - ECC 6.0 Handled Day-to-Day Queries of Customer & resolving them. Drive and FS extension using VMware. Run full backup, log backup etc. Java System Installation- BI System Refresh-DB2, SQL, Oracle Kernel Upgrade Application Server Installation Open connection to sap Responsible for performance and tuning of Oracle databases and Java environments in all the above SAP environments. Performed client copies from instance to instance and within the same instance Backup, System Refresh /System copy  Setting up Transport Management System and preparing Transport layer and Transport Route for moving configurations from Development to Production systems. Performance Monitoring and tuning of ABAP, J2EE systems Worked on critical authorization Objects like S_TABU_DIS, S_DEVELOP, S_RZL_ADM, S_ADMI_FCD and S_TRANSPRT. Worked on SU24 to maintain Check Indicators for the Transaction Codes. Process chains, Info Packages, DTP, Jobs Repeat cancelled chains, check indexes, rollup / activate aggregates, check / rebuild BIA index Change run: controlling, restarting, activate ODS, check and rebuilt indexes Account Management, RAVTC Introduction, Problem Management, Role Development Extensively used tables like AGR_USERS, AGR_TCODES, AGR_1251, AGR_DEFINE etc. Resolved daily SAP Security issues. Maintain various role matrices for roles, authorization objects to keep track of the modifications made the roles. Maintenance of User Master Record & Support End Users with Security issues.