AS400 / IBM i Admin responsibilities

• Advanced System Support (L3)
  Handle complex incidents, root cause analysis, and critical production issues escalated from L1/L2 teams.
• System Performance & Tuning
  Monitor CPU, memory, disk usage; optimize system performance (WRKSYSSTS, WRKACTJOB, etc.).
• Backup & Recovery Management
  Design, maintain, and test backup strategies (full/incremental) using BRMS or native tools; lead disaster recovery activities.
• Security Administration
  Manage user profiles, authorities, auditing (QAUDJRN), compliance policies, and system security settings.
• System Upgrades & PTF Management
  Plan and apply OS upgrades (IBM i versions), cumulative PTFs, group PTFs, and firmware updates.
• High Availability (HA) / DR Solutions
  Manage replication tools (MIMIX, PowerHA, iCluster), ensure data consistency and failover readiness.
• Job & Workload Management
  Troubleshoot job failures, manage job queues, subsystems, and batch processing.
• Storage & IFS Management
  Monitor and manage ASPs, disk utilization, and Integrated File System (IFS) objects.
• Change & Release Management
  Support application deployments, transport changes between environments, and maintain rollback plans.
• Automation & Scripting
  Develop CL programs, automate routine admin tasks, and improve operational efficiency.