Senior Unix Support Engineer in Penarth

Job Overview

We are seeking a highly experienced Senior UNIX Support Engineer to support mission-critical AIX platforms within banking and government environments. This role involves managing OS lifecycle, leading End-of-Support (EOS) upgrades, and ensuring high availability, security, and compliance with organizational and regulatory standards.

The ideal candidate will have strong experience in production support environments, with a focus on system stability, automation, and adherence to ITIL processes and security policies.

Key Responsibilities

• Lead and manage AIX OS End-of-Support (EOS) upgrades across critical systems
• Collaborate with application, infrastructure, and security teams to ensure seamless upgrade planning and execution
• Define and enforce UNIX system configuration standards and governance policies, aligned with organizational and regulatory requirements
• Ensure systems meet availability, performance, resilience, and security standards
• Provide L2/L3 production support, including incident, problem, and change management in line with ITIL framework
• Perform root cause analysis (RCA) for major incidents and implement preventive measures
• Drive system recovery and service restoration with urgency in high-impact scenarios
• Automate operational processes using Perl, KSH, and Python scripting
• Manage and support DevOps and automation tools such as Git/GitHub, Jenkins, Docker, Kubernetes, Ansible, Puppet, Chef, and monitoring tools like Nagios
• Lead system performance tuning and capacity planning initiatives
• Review and govern change requests, ensuring compliance with internal controls and audit requirements
• Manage backup, recovery, and disaster recovery processes in accordance with business continuity plans
• Ensure timely patching, upgrades, and vulnerability remediation for OS and system software
• Support security audits, compliance checks, and regulatory reporting requirements

Key Deliverables

• Successful and compliant delivery of AIX OS upgrade and lifecycle management
• High system availability, stability, and performance in production environmentsImplementation of automation solutions to reduce manual effort and operational risk
• Compliance with security, audit, and regulatory standards (e.g., MAS guidelines, internal IT policies)

Requirements

• Minimum 5 years of hands-on experience in UNIX system support, with strong expertise in AIX
• Proven experience in banking, financial services, or government project environments
• Strong knowledge of AIX system administration, including volume management, file systems, clustering, NTP, DNS, SSH, and monitoring tools (e.g., TSM, ITM)
• Experience in production support (L2/L3) with exposure to incident, problem, and change management
• Solid experience in UNIX troubleshooting, performance tuning, and system optimization
• Hands-on experience with server clustering and high-availability environments
• Familiarity with DevOps tools and CI/CD pipelines
• Good understanding of IT security, vulnerability management, and compliance standards
• Knowledge of networking and data communication concepts
• Experience supporting middleware and enterprise applications on UNIX platforms is an advantage
• Regional support experience is preferred

Preferred Skills & Competencies

• Strong understanding of ITIL processes and service management best practices
• Ability to work in high-pressure, mission-critical environments
• Strong analytical, troubleshooting, and problem-solving skills
• Excellent stakeholder management and communication skills
• Proactive, detail-oriented, and able to work independently
• Please note this is a shift-based role.