Senior Oracle DBA - Security, Patch & Automation Lead

Exasoft; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Exasoft is seeking an experienced Oracle Database Administrator (DBA) to manage security, patching, and high availability across SIT to Production environments in Singapore. The role requires CVE assessments, patch lifecycle management, and automation, with hands-on work on Oracle RAC, Data Guard, and RMAN.

You will implement CPUs/RU, ensure security hardening, and maintain compliance. This position involves patch deployment and rollback planning, incident handling, and ongoing performance

Qualifications

• Bachelor's Degree in Computer Science, Information Technology, or a related discipline.
• 7+ years of experience as an Oracle Database Administrator.
• Strong hands-on experience with: Oracle Database 19c / 21c, Oracle RAC, Oracle Data Guard, Oracle ASM.
• Experience applying Oracle CPUs, Release Updates (RU), and Patch Set Updates.
• Knowledge of Oracle database security hardening and vulnerability management.
• Experience with BigFix administration and Fixlet deployment.
• Familiarity with ITIL Change, Incident, and Problem Management processes.
• Strong troubleshooting and performance tuning skills.

Responsibilities

• Perform CVE impact assessments for Oracle Database environments.
• Review Oracle Critical Patch Updates (CPU), Release Updates (RU), and Security Advisories.
• Analyze security vulnerabilities and determine their impact on Oracle databases.
• Develop remediation strategies and security patch recommendations.
• Track vulnerability remediation and compliance status.
• Plan, schedule, and coordinate Oracle database patching activities.
• Apply Oracle RU, RUR, and one-off patches.
• Perform patch deployment across SIT, UAT, DR, and Production environments.
• Develop rollback and contingency plans for patch implementations.
• Conduct pre-patch and post-patch validation activities.
• Develop and maintain BigFix Fixlets for Oracle database patch deployments.
• Perform Fixlet testing and validation in SIT environments.
• Troubleshoot deployment issues and optimize automation processes.
• Promote validated Fixlets through UAT and Production environments following change management approvals.
• Install, configure, upgrade, and maintain Oracle Database environments.
• Perform database health checks and performance monitoring.
• Manage Oracle RAC, Data Guard, ASM, and RMAN backup/recovery operations.
• Support database refresh, cloning, migration, and disaster recovery activities.
• Ensure database availability and performance meet business requirements.
• Prepare SLA and operational performance reports.
• Generate patch compliance and vulnerability remediation reports.
• Maintain database security and audit documentation.
• Support internal, external, and regulatory audit requirements.
• Participate in change planning, risk assessment, and CAB reviews.
• Coordinate maintenance activities with infrastructure, application, and security teams.
• Ensure all deployments follow enterprise change management procedures.
• Develop and maintain Oracle database runbooks and SOPs.

Skills

Oracle DBA

Security hardening

Troubleshooting

Automation scripting

ITIL processes

BigFix

Education

Bachelor's Degree in Computer Science/IT

Tools

BigFix

RMAN

Job description

Exasoft is seeking an experienced Oracle Database Administrator (DBA) to manage security, patching, and high availability across SIT to Production environments in Singapore. The role requires CVE assessments, patch lifecycle management, and automation, with hands-on work on Oracle RAC, Data Guard, and RMAN.

You will implement CPUs/RU, ensure security hardening, and maintain compliance. This position involves patch deployment and rollback planning, incident handling, and ongoing performance