Samuel Gavazut

• Administer and optimize Oracle Exadata Cloud Services (ExaCS) environments, ensuring high availability, performance, and operational stability.
• Perform proactive Exadata health checks and system monitoring to identify and mitigate risks.
• Execute Dom0/DomU patching, PSU and security updates with full pre-check and post-check validation.
• Manage Oracle RAC clusters, performance tuning, and high-availability / disaster-recovery configurations.
• Oversee backup and recovery operations, validating backup integrity and regularly testing restore procedures.
• Automate infrastructure using Chef (Infrastructure as Code), developing and maintaining custom recipes for large-scale Oracle environments.
• Develop advanced shell scripts to support monitoring, backup automation, and system administration workflows.
• Implement Ansible for configuration management and deployment automation.
• Deploy and configure new ExaCS infrastructure, including nodes, databases, and supporting services.
• Maintain detailed technical documentation for patching, backup, and infrastructure processes.

• Administered, supported, and monitored databases by proactively resolving database issues and maintaining servers.
• Provided timely resolution of critical production issues, minimizing downtime and avoiding potential revenue loss.
• Established proactive monitoring solutions that alerted administrators to potential issues before they escalated into major problems.
• Leading migration projects from on-premises databases to cloud environments and Autonomous databases, specifically utilizing Oracle Cloud Infrastructure (OCI).
• Developing and testing disaster recovery plans and procedures to ensure data integrity and availability across multiple platforms.
• Administering robust backup and recovery strategies using Oracle Recovery Manager (RMAN), ensuring comprehensive data protection and rapid recovery in the event of data loss.

• Orchestrating the migration of a 2TB Oracle Database 11g from On-Premise to Oracle RDS 19c on AWS, leveraging Oracle Goldengate Classic architecture 19c and implementing bidirectional replication.
• Directing the migration of a 6TB Oracle Database 11g from On-Premise to Oracle Database 19c in OCI. This intricate process utilized Oracle Goldengate Cloud Services (21c) for bi-directional replication, complemented by an additional replication pathway from OCI to Azure.
• Configuring and updating an OEM 13.5 to monitor both On-Premise and Cloud OCI database instances.

• Led large-scale migrations of Oracle databases (11g–19c) to OCI, delivering 100+ successful production and pre-production migrations using GoldenGate, Data Guard, XTTS, ZDM, and Data Pump.
• Designed OCI architectures across SaaS, PaaS, and IaaS, including networking, VPN connectivity, tenancy setup, and IAM policies.
• Implemented Exadata Cloud Services and Exadata Cloud@Customer (X8M-2, X9M-2) for major financial institutions in Latin America.
• Migrated enterprise ERP and CRM platforms, including JD Edwards, SAP, and Siebel Innovation Pack 2021/2022, to OCI, providing database administration, performance tuning, and post-migration stabilization for mission-critical workloads.
• Deployed Oracle Autonomous Database and Autonomous Data Guard solutions.
• Built Oracle RAC 19c clusters (2-node and 4-node) for on-premises and cloud environments.
• Converted legacy Non-CDB databases to CDB/PDB multitenant architectures.
• Implemented Oracle Audit Vault, Oracle Key Vault, and TDE to meet security and compliance requirements.
• Enabled OCI Observability and Operations Insights for performance tuning and capacity planning.
• Automated OCI infrastructure using Terraform, Ansible, Chef, and shell scripting.
• Supported multi-cloud migrations to Amazon RDS and Microsoft Azure.
• Installed and configured Oracle Enterprise Manager 13.4 with clustered OMS architecture.

• Led production and pre-production Oracle database migrations from 11g R2 to 12.2.0.1 for major financial institutions in Chile and Colombia using Data Guard and GoldenGate.
• Migrated and administered Siebel CRM databases (v8 to IP20), performing performance tuning, capacity planning, and operational support for mission-critical Siebel applications.
• Designed and implemented Oracle RAC 2-node clusters with Data Guard to ensure high availability.
• Administered and tuned Oracle Exadata environments, optimizing IORM, HugePages, and core performance parameters.
• Implemented and managed Multitenant (CDB/PDB) architectures and installed Oracle 18c/19c, Oracle Cloud Control 13c, and BI Publisher.
• Provided L2/L3 support for complex Oracle RAC, GoldenGate, and ERP workloads, including JD Edwards, while administering PostgreSQL and SQL Server (Always On, Azure migrations).

While residing in Toronto, Canada, I honed my English skills and collaborated remotely with companies in Colombia, Chile, and Venezuela. My primary responsibilities encompassed the configuration and management of Oracle RAC databases, specifically versions 11g and 12c. Beyond that, I fine-tuned queries using PL SQL and Oracle Spatial and engaged in projects focused on SQL Server Mirroring Configuration.

• Installed, configured, patched, cloned, and upgraded Oracle Databases on AIX, Solaris, and Linux platforms across versions 9i, 10g, 11g, and 12c. Tuned Oracle databases specifically for the Murex, SIEBEL and JDE applications.
• Collaborated with clients in banking and insurance on Oracle Database management, security, and clustered environments.
• Managed SQL Server databases and Weblogic applications.

• Installed, configured, and administered Oracle VM.
• Set up Oracle APEX and its Listener on Glassfish.
• Managed Oracle databases and VMs, implemented backup and restore policies using Oracle RMAN, and administered SQL Server databases.

• Installed and configured Oracle databases on Solaris and AIX platforms.
• Managed Oracle databases across versions 9i, 11g, and 12c.
• Consulted for clients in banking and insurance on Oracle Database management, clustered environments, backup, and replication.

• Installed, configured, and administered Oracle databases on Windows Server platforms across versions 9i, 10g, and 11g.
• Developed database objects and complex queries using Transact-SQL, PostgreSQL, and PL SQL, incorporating Oracle Spatial and Oracle Text.
• Built spatial databases for both Oracle and SQL Server, integrating them with mapping tools like ESRI and MapInfo.
• Developed applications utilizing Oracle APEX.