Systems Administrator III; IBMi​/AS400

Location: Denver, CO (Onsite during training, then flexible remote)

Duration: 6-month contract (potential extension)

Job Description

A financial client of Insight Global is seeking a Systems Administrator III to support and maintain their IBMi (AS/400) environment. This individual will be responsible for day-to-day system operations, performance monitoring, maintenance, and troubleshooting across critical infrastructure.

This role sits within a fast‑paced and highly critical environment where reliability and system uptime are essential. The ideal candidate will be comfortable taking ownership of operational tasks, identifying issues proactively, and supporting enterprise-level systems with minimal oversight after onboarding.

Key Responsibilities:

• Monitor and maintain IBMi (OS/400, i5/OS) systems to ensure performance and uptime
• Perform system health checks, job monitoring, subsystem management, and message handling
• Apply system updates including PTFs, firmware updates, and OS upgrades
• Manage user profiles, security access, and system resource allocation
• Execute backup, restore, and storage management activities
• Troubleshoot hardware, OS, and system performance issues
• Analyze logs and performance data to identify root causes
• Partner with vendors for hardware maintenance and issue resolution
• Support and enhance backup, archival, and disaster recovery processes
• Participate in an on‑call rotation for after‑hours or weekend support

Must‑Haves

• 3–5+ years of experience supporting IBMi / AS400 / iSeries environments
• Strong experience with IBMi system administration (OS/400, CL commands)
• Hands‑on experience with IBMi hardware and system operations
• Experience with Power
  
  VM setup and configuration
• Strong understanding of storage concepts and management
• Experience with job scheduling, system monitoring, and backup/recovery processes
• Ability to troubleshoot system, performance, and operational issues independently
• Knowledge of IBMi security, user provisioning, and access management
• Strong documentation practices and familiarity with change management processes

Nice‑to‑Haves

• Experience with enterprise backup tools such as Cohesity or TSM (Tivoli Storage Manager)
• Exposure to enterprise storage systems (SAN/NAS, IBM Power Storage, etc.)
• Experience with high availability/disaster recovery tools (Power
  
  HA, MIMIX, Robot HA)
• Familiarity with automation tools (Robot Schedule, Help Systems, or similar)
• Knowledge of ACBS (Advanced Commercial Banking System)
• Understanding of networking concepts related to IBMi (TCP/IP, FTP, ODBC)