Linux & Systems Administration
Supporting business-critical infrastructure across Red Hat Linux, AIX and Solaris, from day-to-day production operations and incident resolution through major migrations, automation, monitoring and recovery.
Production Operations
Long-standing experience providing BAU support for UNIX and Linux systems in 24/7 enterprise environments, including out-of-hours support and on-call activity for business-critical services. Responsibilities have included incident and problem resolution, senior technical escalation, service restoration to SLA, performance investigation, patching, upgrades and controlled operational change.
Platforms
Commercial experience includes Red Hat Enterprise Linux, IBM AIX and Solaris, with work spanning RHEL 4/5/6/7, AIX LPAR administration, Red Hat on VMware, Solaris-to-IBM AIX P-series migrations and enterprise UNIX infrastructure support.
Automation
Automated Red Hat Linux patching using Bash before moving the process to Ansible, improving consistency, repeatability and operational control while reducing reliance on manual administration.
Migration & Change
Experience includes Solaris-to-AIX migrations, Red Hat upgrades, service transitions and technical leadership for a major enterprise data-centre migration, supported by formal change control, validation, rollback planning and operational handover.
Monitoring & Platforms
Supported application and middleware infrastructure across UNIX and Linux environments, including LAMP platforms, IBM Content Manager, DB2 and associated enterprise services, combining operating-system administration with the applications and dependencies running on it.
Resilience
Practical experience of backup and recovery, disaster recovery testing and high-availability environments, including validating that systems and services could be recovered when required. This developed into later responsibility for technical business continuity, recovery planning and coordinated disaster recovery exercises.
Current Engineering
Alongside commercial experience, I continue to administer Linux systems through my engineering environment, using automation, monitoring, security tooling, virtualisation and documented infrastructure change.