IBM iSeries (AS/400) Infrastructure Administrator – Remote

About the role

We are seeking a highly experienced IBM iSeries (AS/400) Infrastructure Administrator – L1/L2/L3 to lead the administration, optimization, modernization, and support of enterprise IBM i environments. The role provides L3 technical leadership, handles complex incidents, and mentors support teams while ensuring reliability, availability, and security of business‑critical IBM i platforms.

Key responsibilities

• Provide L3 technical leadership and mentoring to L1 Operators and L2 Administrators.
• Handle complex infrastructure incidents and critical escalations.
• Develop operational procedures, standards, and IBM i best practices.
• Support architecture reviews and infrastructure planning.
• Administer and optimize IBM i environments.
• Perform performance analysis, system assessments, and capacity planning.
• Monitor system health, availability, and operational metrics.
• Prepare executive‑level reports on infrastructure performance and availability.

Required skills

• IBM i / AS400 infrastructure administration.
• IBM Power Systems and LPARs.
• HMC and VIOS administration.
• Performance management and capacity planning.
• BRMS, backup/recovery, high availability (HA) and disaster recovery (DR).
• IBM i security, SSL certificates, digital certificates, SSH and secure key management.
• IFS, SAN, storage and tape libraries.
• TCP/IP networking on IBM i.
• Advanced Job Scheduler.
• OS upgrades, PTF management and Power firmware upgrades.
• Production environment management and critical incident handling.
• Troubleshooting and 24x7 on‑call support.