Oracle EBS EXA DBA

Job Title: Oracle EBS Exadata DBA Engagement Type: 6-Month Contract (Potential for extension) Location: London, UK (Hybrid: 1 day per week onsite, flexible)

Position Overview

We are seeking a seasoned Oracle Apps DBA to manage, optimize, and secure our mission-critical Oracle E-Business Suite (EBS) and underlying database infrastructure. This hands-on, enterprise-level role requires expertise across application, database, operating system, and cloud/infrastructure domains. The ideal candidate will possess robust troubleshooting capabilities and practical experience with cloud migration initiatives (OCI or Microsoft Azure).

Core Responsibilities

1. Oracle EBS & Technology Stack Administration

Manage and maintain Oracle EBS (R12) across non-production and production environments. Perform application cloning, environment refreshes, and technology stack patching (AD/TXK utilities). Administer application-tier components: WebLogic, Oracle HTTP Server (OHS), Forms, Reports, Concurrent Managers, and Workflow. Oversee context file management, AutoConfig maintenance, and system integration points.

1. Database Administration & High Availability

Configure, maintain, and tune high-availability Oracle Databases supporting EBS (including Oracle RAC). Execute database cloning, upgrades, patching, and cross-platform migrations. Conduct performance diagnostics and tuning using AWR, ASH, execution plans, and trace files to resolve locks, resource contention, and wait events. Implement disaster recovery (DR) strategies, RMAN backups, and Oracle Data Guard failovers aligned with RPO/RTO objectives. Administer database security, storage, user permissions, and compliance auditing.

1. Infrastructure, OS & Cloud Engineering

Administer Oracle databases and EBS applications on Linux and AIX platforms. Write complex shell scripts (Bash/KornShell) to automate routine operational workflows. Troubleshoot system-level bottlenecks across CPU, memory, filesystem, and storage layers (SAN/NAS). Support cloud migration projects from on-premises infrastructure to OCI or Azure. Ensure secure connectivity, proper network setup (DNS, TCP/IP, firewalls, load balancers), and post-migration performance stabilization.

1. Support, Operations & Compliance

Provide tier-3 production support and participate in major incident response and root cause analysis (RCA). Execute operational changes under standard ITIL frameworks (Incident, Problem, and Change Management). Maintain clear operational runbooks, architecture diagrams, and patching logs.

Candidate Qualifications & Skills

Essential Requirements

Experience: 7+ years of hands-on experience in Oracle Database and Oracle Apps DBA roles within enterprise production environments. Oracle EBS: Strong expertise in Oracle EBS R12 architecture, patching (AD/TXK), AutoConfig, and cloning procedures. Oracle Database: Mastery of Oracle Database administration, Real Application Clusters (RAC), RMAN, and performance tuning. Operating Systems: Deep operational knowledge of Linux and AIX environments, alongside advanced shell scripting skills. Support Capabilities: Demonstrated track record in end-to-end troubleshooting across application, database, network, and OS layers.

Preferred / Desirable Skills

Cloud Platforms: Experience with Oracle Cloud Infrastructure (OCI) or Microsoft Azure, including database migration strategies. Replication & Automation: Familiarity with Oracle GoldenGate, Data Guard, Ansible, or Terraform (IaC). Middleware & Security: Proficiency with WebLogic Server, Oracle HTTP Server, and security hardening standards. Frameworks: ITIL process familiarity and experience with enterprise monitoring platforms. Certifications: Official certifications in Oracle Database, Oracle EBS, Linux/AIX, or OCI/Azure.Randstad Technologies is acting as an Employment Business in relation to this vacancy