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# Senior Oracle Database Administrator

- **Company:** Mastercard
- **Location:** Waterloo, Belgium
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Cloud Computing, Cloud Database, Cyber Security, Databases, Database Security, Software Design Patterns, Linux, PostgreSQL, Networking Basics, Oracle Databases, Oracle (Applications), Performance Tuning, Query Optimization, Recovery Manager (RMAN), Shell Script, PL-SQL, Sql Optimization, System Availability, Database Optimization, Database Monitoring, Splunk, Dynatrace
- **Published:** August 7, 2026
- **Apply:** https://dejobs.org/x/x/350C34CF57CF41B6A5F40DC921421BF1/job/

## About the Role

You are a seasoned database professional with extensive experience managing mission-critical, enterprise-scale database platforms. You bring strong hands-on expertise in:

Oracle and PostgreSQL database administration, including configuration, patching, upgrades, and performance optimization

Advanced SQL and PL/SQL development, query tuning, and DDL design to support application and platform teams

Linux/Unix environments, shell scripting, and database automation using Shell, PL/SQL, and related tools

Backup, recovery, and replication technologies, including RMAN and pg_dump

Database monitoring and observability using tools such as Dynatrace and Splunk

Database security concepts, including users, roles, privileges, access controls, and compliance considerations

Database architecture, networking fundamentals, and high-availability design patterns

Cloud platforms and managed database services, including cloud-based administration concepts

You have strong performance tuning and troubleshooting skills, with the ability to diagnose complex issues, optimize queries and indexing strategies, and improve overall system efficiency. You are comfortable leading moderate to large database initiatives, planning complex technical efforts, and coordinating work across multiple teams.

You communicate effectively with both technical and non-technical stakeholders, and you are confident advocating for database best practices, standards, and governance. You value high-quality documentation and actively contribute to maintaining and enhancing DBA processes, runbooks, and operational guidelines.

You thrive in a global, collaborative environment, enjoy mentoring junior team members, and continuously look for opportunities to improve database reliability, scalability, and operational efficiency.

## Description

We are seeking a Senior Oracle Database Administrator (Senior Oracle DBA) with deep expertise in Oracle and PostgreSQL to lead the stability, performance, and evolution of enterprise database platforms. This role plays a critical part in ensuring database reliability, security, automation, and scalability across a complex, global technology landscape, while partnering closely with engineering, infrastructure, and business teams., As a Senior Oracle DBA, you will own the end-to-end administration, optimization, and operational excellence of enterprise database environments. You will lead database configuration, patching, upgrades, and performance tuning initiatives, ensuring high availability, resiliency, and compliance with security and governance standards.

You will proactively monitor database platforms, identify and resolve complex performance and stability issues, perform root cause analysis, and drive long-term remediation and optimization strategies. You will play a senior role in database architecture decisions, backup and recovery design, replication strategies, and cloud-based database administration.

This role requires close collaboration with application, infrastructure, and platform engineering teams to translate business and technical requirements into scalable database solutions. You will ensure adherence to change, incident, and problem management processes while continuously improving operational maturity.

In addition, you will champion database best practices, standards, and governance across the organization, contribute to process improvements, and provide technical leadership through mentoring and guidance of junior DBAs. Participation in an on-call rotation, including after-hours and weekend support, is required to ensure service continuity., All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

 * Abide by Mastercard's security policies and practices;
 * Ensure the confidentiality and integrity of the information being accessed;
 * Report any suspected information security violation or breach, and
 * Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.


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