Dusan Gnjatic

Experienced Oracle Database Professional, certified on Oracle Database versions 11g and 19c. Extensive expertise in PL/SQL, database management, performance tuning, automation, and optimization with over 10 years in the IT sector. Extensive experience leading teams and mentoring senior staff.

Administered Oracle databases (versions 11g, 12c, 19c), including RAC and EXADATA, managing databases exceeding 500TB for various Telcos across South Africa and Africa. Leveraged tools such as Oracle RMAN, Oracle DataGuard, and Oracle GoldenGate to maintain 99% SLA uptime Performed installation, upgrades, and patching of Oracle RDBMS, ASM, and EXADATA software across multiple versions. Adhered to best practices and quality benchmarks, resulting in fully patched and up-to-date systems delivered on a quarterly schedule Leveraged Oracle’s features to ensure scalable, secure, and high-performing database management across Oracle RDBMS, ASM, and Exadata platforms, exceeding client requirements Exceeded 95% SLA compliance in ticket management by monitoring and reporting SLA performance metrics. This enabled proactive service improvements and reduced calls and ticket generation by over 80%. Consistently achieved 99% on-time resolution of customer tickets within defined SLAs Deployment and management/maintenance of Enterprise Manager (OEM), BIP, OAS, and custom metrics for monitoring and reporting purposes, including integration with 3 party tools. This streamlined workflows and identified key areas for improvement, leading to improved customer service and proactive database management rd Utilized DB and PL/SQL performance tuning methodologies to achieve enhancements in reporting efficiency, achieving significant reduction in database compute time. The performance improvement was underpinned by data architecture redesigns that ensured performance and scalability Implemented best practices for storage management. Ensured continuous monitoring of storage utilization and system health, providing accurate forecasts for database growth while applying compression techniques considering workload impacts. This enabled proactive planning for expansion and hardware upgrades while reducing the storage footprint Ensured rigorous compliance with regulatory and internal audit requirements by thoroughly reviewing audit reports and utilizing appropriate tools to orchestrate effective remediation plans, resulting in enhanced security with no data breaches, security incidents, or failed audit checks Performed post-disaster restoration and recovery of databases, maintaining full data integrity and no data loss using RMAN and other technologies Served as team and project lead for a 15-member team supporting Telco markets and acted as the primary point of contact for clients. Delivered on infrastructure upgrades (EXADATA), new system deployments, and other projects on time and within scope Developed and streamlined training materials, SOPs, reviews, and mentoring practices to drive both individual and organizational excellence Led and managed a 15-member team through 24/7 standby duties and roster balancing to create sustainable availability whilst preventing team burnout Successfully executed remote EXADATA setup during the pandemic, achieving cost reductions while ensuring uninterrupted system availability Led migration and consolidation of database systems to virtualized platforms, optimizing hardware resource management and reducing resource wastage by 50% Team lead for the conversion of bare metal EXADATA to virtualization (both OVM and KVM), and integrated with OCI for data migration to the cloud, allowing for rapid transition and cost savings, and expansion Led the transition from in-person to virtual collaboration tools, maintaining 100% project continuity during remote work adoption, whilst streamlining communication channels Led the restoration of sensitive data to a new platform for auditing purposes, restoring hundreds of TB of archived data faster than SLA demand

Bachelor of Commerce with Honors (1st), Major in Information Systems and Economics, Rhodes University, Grahamstown, 2010 - 2013