Rainier Softech - AS400 Administrator

Job Summary :

The IBM i (AS/400) Administrator is responsible for the architecture, performance, reliability, security, and lifecycle management of enterprise IBM i environments. This position goes beyond daily operations and provides advanced technical leadership in system engineering, performance optimization, OS upgrades, capacity planning, high availability/disaster recovery (HA/DR), database tuning, automation design, and integration with major enterprise applications.

Essential Duties & Responsibilities :

System Administration & Engineering :

- Design, configure, and maintain IBM i LPARs, system values, storage pools, subsystems, memory pools, and devices.

- Plan and execute OS upgrades, PTF installations, and firmware updates.

- Manage IBM Power Systems hardware and HMC resources.

- Configure networking, security, SSL certificates, and system access.

- Implement automation platforms.

Performance Analysis & Optimization :

- Conduct performance monitoring using IBM tools.

- Diagnose CPU, memory, disk, and job performance issues.

- Optimize DB2 for i and batch workloads.

- Produce capacity forecasts and performance reports.

High Availability & Disaster Recovery :

- Administer MIMIX replication.

- Perform DR testing and maintain runbooks.

- Reduce replication lag and optimize journal management.

Backup, Recovery & Storage :

- Manage BRMS policies and VTL workflows.

- Diagnose DASD growth and storage-related issues.

- Develop cleanup automation.

Security, Compliance & Audit :

- Maintain profiles, authorization lists, and system security.

- Implement hardening standards.

- Support audits and remediation efforts.

Application, Database & Integration Support :

- Support IBM i Access Client Solutions.

- Analyze DB2 for i SQL performance.

- Support third-party integrations.

Documentation & Change Management :

- Produce engineering documentation and diagrams.

- Maintain change control compliance.

Required Qualifications :

Administrator :

- 5+ years IBM i experience

- Strong knowledge of operations, BRMS, and system administration

Preferred Qualifications :

- Experience with Lawson/Infor, LSAMS, or hospitality systems

- Experience with SOX/PCI environments