C005199 MySQL / PostgreSQL DBA (NS) - FRI 4 Sep

Over deze functie

Deadline Date: Friday 4 September 2026
Requirement: MySQL / PostgreSQL DBA
Location: Brussels, BE
Full Time On-Site: Yes
Time On-Site: 100%
Total Scope of the request (hours): 418
Required Start Date: 11 October 2026
End Contract Date: 31 December 2026
Required Security Clearance: NATO SECRET

Duties & Role:
Operational DBA Duties

• Install, configure, maintain and upgrade standalone and/or clustered instances: PostgreSQL 12+, MySQL 8.0+

• Perform routine maintenance (schema housekeeping, index maintenance, statistics updates, data retention support).

• Manage users, roles, privileges, and authentication methods according to least-privilege principles.

• Manage storage growth and capacity forecasting (disk usage, table growth trends, partitioning/archiving recommendations).

• Troubleshoot complex production issues including data corruption, replication failures and performance degradation

• Maintain environment consistency across DEV/UAT/PROD where applicable.

• Perform Root Cause Analysis (RCA) for critical incidents

• Coordinate with application and infrastructure teams
Advanced monitoring and performance tuning

• Monitor and analyse database health and performance metrics: Lock contention, deadlocks, wait events; Replication lag; Resource utilization (CPU, memory, I/O)

• Query performance analysis and optimization: o PostgreSQL: EXPLAIN (ANALYZE, BUFFERS); MySQL: Query optimization, execution plans, InnoDB tuning

• Index strategy design and maintenance

• Identification and remediation of locking, contention, and deadlocks

• Capacity planning and workload growth forecasting Implementation and management of backup and recovery strategies

• PostgreSQL: Physical backups (pg_basebackup); Logical backups (pg_dump, pg_dumpall); WAL archiving and Point-in-Time Recovery (PITR)

• MySQL: Logical and physical backups (mysqldump, MySQL shell, Percona, XtraBackup); Point-in-Time Recovery (binlog-based)

• Both Platforms: Backup strategy implementation and validation; Periodic backup and recovery testing
Design and operate High Availability & Disaster Recovery solutions

• PostgreSQL: Streaming replication (physical and logical); Synchronous and asynchronous replication

• MySQL: Asynchronous and semi-synchronous replication; High availability architectures (InnoDB Cluster, Group Replication)

• Both Platforms: Automated failover and switchover support; Disaster recovery documentation and runbooks
Enforce database security best practices

• Role-based access control and privilege management

• Authentication and password policy enforcement

• TLS/SSL encryption

• Audit logging and compliance support

• Security hardening and vulnerability remediation
Maintenance & Lifecycle Management

• Patch management and minor version upgrades

• Major version upgrade planning and execution

• Schema change review and deployment support

• End-of-life planning and platform recommendations
Requirements
Skills, Knowledge & Experience:

• The candidate must have a currently active NATO SECRET security clearance

• 5+ years hands-on experience in at least one of the above database technologies (MySQL or PostgreSQL) and 2+ years of experience in the second database technology (MySQL or PostgreSQL)

• MySQL: Strong knowledge of MySQL architecture, storage engines (InnoDB); Hands-on experience with backup tools like mysqldump, MySQL shell, Percona, XtraBackup

• PostgreSQL: Deep understanding of PostgreSQL internals; Experience managing large datasets, storage growth, autovacuum and index maintenance; Experience with WAL and archiving; Experience managing PostgreSQL extensions

• Experience with SQL optimization, indexing, and query execution plans.

• Strong Linux administration skills (system resources, I/O, file systems, network basics) relevant to database performance.

• Knowledge of security best practices (TLS, privilege management, audit/logging, secure configuration).

• Automation mindset: experienced with scripting (Bash/Python/Perl).
Preferred/Advanced skills:

• MySQL: Experience with cloud-managed MySQL platforms (AWS RDS/Aurora, GCP Cloud SQL, Azure Database for MySQL); Familiarity with MySQL Shell, Orachestrator, ProxySQL or HAProxy

• PostgreSQL: Practical experience with pgvector; Knowledge of HNSW and IVFFlat indexes and their tuning parameters; Experience with containerized or Kubernetes-based database deployments; Understanding of pgvector upgrades and compatibility with PostgreSQL versions