Sahar Osman Mohamed ELHassan Naser

Sahar Osman Mohamed El Hassan Naser

Database Administrator



Experienced Database Administrator with a performance tuning, crisis management, and high availability to increase reliability, maximize productivity, and introduce system efficiencies.


2015 Sep - Present
Database Administrator
Electronic Banking Services Co. Ltd
  • Supported a six-terabyte data warehouse; play a lead role in enterprise-wide database optimization and instance and resource monitoring. Perform root cause analysis on failures. Resolve performance tuning related issues, reports, and queries. Work actively on different versions (11g, 12C and 19C) RDBMSs on Linux platform. Provide on-call support for enterprise databases.
  • Exported and imported data using export/ import utilities; performed migration from 11g to 12C.
  • Successfully set up a three-node cluster and RAC data warehouse administration.Fined tune database wait event as result of Ran statistics collection.
  • Started and managed biweekly optimization meetings with enterprise user groups to address and resolve performance-related issues.
  • Identified, led, and established automation of repetitive processes to minimize errors.
  • Configured 11g R2, 12C Active Standby database in Amazon cloud for supporting high priority reporting application to offload the primary database, as well as in non-cloud environment.
  • Configured and Installed Oracle 11g Grid Control (Cloud Control) day to day administration, maintenance and Performance tuning.
  • Implemented, administrated, and maintained daily backup and archived data on tape, actively test switchover/failover and database recovery using User-Managed (hot backup), RMAN-Managed Recovery and performed FLASHBACK features to handle efficient database recovery.
  • Managed a process of securing database to improve and consolidate at-rest and in-transit data encryption, more discrete authorization levels, label-based access control; data masking, database auditing, and trusted context (to authorize only specific locations for interactions between the DBMS and an application).
  • Conducted database capacity planning related to database growth and system utilization, trend analysis and prediction which led to optimize future database resource requirements.
  • Create and maintain environment specific Run documentation that outlines important information such as job schedules, setup and configuration as well incident solutions.
2012 Sep - 2014 Apr
Teacher assistant
University of Medical Science and Technology
2011 Oct - 2012 Jul
Teacher assistant
University of Science and Technology
2011 Oct - 2012 Jul
Teacher assistant
University of Khartoum


LKS Training Centre

Red Hat Linux System Administration Workshop I & II (November-2016)

LKS Training Centre

LKS Training Centre

Oracle Database Administration Workshop I & II (September-2015)

LKS Training Centre

University of Khartoum
MSc in Computer, Faculty of Mathematical Science

MSc in Computer science (Jan 2013 - Jan 2014)

Faculty of Mathematical Science, University of Khartoum

Project: Studying and Implementing Cloud stack

University of Khartoum
BSc, Computer Science

BSc Computer Science - Statistic (Division || - Upper) (Nov 2006 - Jul 2011)

Faculty of Mathematical Science, University of Khartoum