AS400 Administrator

About the role

We are seeking an experienced AS400 Administrator to manage and optimise our IBM iSeries environment. The role involves end‑to‑end system administration, performance tuning, and ensuring high availability of critical business applications.

Key responsibilities

• Perform IBM iSeries administration, including system installation, PTF deployment, software installation, configuration, custom development and security.
• Execute performance analysis and system tuning for optimum performance.
• Isolate, define, resolve and follow‑up on system, application and customer problems.
• Install, upgrade, configure, test and maintain third‑party software applications.
• Manage capacity expansion of servers (disk, memory, CPU, adapters) and OS patching/upgrades.
• Maintain high‑availability (HA) and Disaster Recovery (DRS) environments and oversee site‑recovery concepts.
• Handle HMC hardware firmware updates and upgrades.
• Administer backup and replication tools such as BRMS, Vision Solutions MIMIX/iTera, Advance Job Scheduler/Robot Scheduler, and MIMIX/QEDD.
• Rebuild production and development servers when required and manage hardware backup solutions (tape drive, tape library).
• Provide Level 3 support for the IBMi team and manage audit evidence submissions.

Required profile

• 8+ years of hands‑on AS400/IBMi administration at Level 3.
• Strong knowledge of CL programming and DB2 concepts (DB2 9, 10, 11).
• Experience with HA/DRS environments and site recovery.
• Familiarity with HMC, BRMS, MIMIX/iTera, and advanced job scheduling tools.
• IBMi certification and ITIL V4 Foundation are a plus.

Required skills

• AS400 (IBM iSeries) administration
• System installation, PTF deployment, software configuration
• CL programming
• DB2 (versions 9, 10, 11) concepts
• Performance analysis and system tuning
• Problem isolation and resolution
• Third‑party software installation and maintenance
• Capacity planning (disk, memory, CPU, adapters)
• OS patch management
• High‑availability (HA) and Disaster Recovery (DRS) concepts
• HMC hardware firmware updates
• Vision Solutions MIMIX/iTera
• BRMS (Backup Recovery Management System)
• Advance Job Scheduler / Robot Scheduler
• MIMIX/QEDD replication
• Hardware backup solutions (tape drive, tape library)