AS400 Admin- Lead

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Job Title: AS400 Admin - Lead
Position: SSE/LA
Experience: 6-9 years
Category: Software Development/Engineering
Shift: 5:30 PM to 2:30 AM IST
Main location: Bangalore Chennai Hyderabad
Position ID: J0926-1800
Employment Type: Full Time
Education Qualification: Bachelors degree in Computer Science or related field or higher with minimum 06 years of relevant experience

Job Summary
Experience Required: 69 Years

Job Summary
We are seeking a high caliber Senior AS/400 (IBM i) Systems Administrator / Infrastructure Engineer (L3 Support) to serve as the senior technical authority for our enterprise IBM Power Systems this lead engineering role you will be responsible for platform architecture operating system upgrades virtualization design deep tier incident forensics high availability/disaster recovery (HA/DR) design storage engineering and performance optimization.
The successful candidate will act as the final internal escalation tier for mission critical IBM i infrastructure incidents drive complex OS migrations across releases (IBM i 7.3 7.4 and 7.5) architect PowerVM and VIOS environments optimize enterprise storage configurations (IASP SAN integration) and orchestrate automated HA/DR replication architectures (PowerHA MIMIX). This role focuses purely on system architecture operating system engineering security hardening and infrastructure resilience serving as the technical liaison to IBM Support (PMR/Escalations) enterprise architects and executive IT management.



Key Responsibilities
1. Level 3 Escalation Deep Diagnostics & Root Cause Analysis (RCA)

. Serve as the supreme technical escalation authority for severe (P1/Major) system outages abnormal IPLs kernel exceptions hung partitions and machine check conditions.
. Conduct advanced system crash investigations using System Service Tools (SST) Dedicated Service Tools (DST) Main Storage Dumps (MSD) and LIC trace analysis.
. Interrogate advanced logs (PAL QHST Advanced Job Logs) to diagnose complex intermittent hardware faults bus channel errors and memory corruptions.
. Own and author definitive Root Cause Analysis (RCA) documentation; engineer preventative architecture changes to permanently eliminate systemic failure modes.
. Manage and drive complex technical support cases (PMRs / IBM Support Cases) coordinating directly with IBM Level 3 labs and Rochester development teams.

2. Operating System Lifecycle Version Migrations & PTF Engineering

. Architect plan and execute major OS release upgrades (e.g. migrations from IBM i 7.3/7.4 to 7.5) and Technology Refresh (TR) cycles across large scale enterprise estates.
. Formulate comprehensive PTF management policies; perform cross subsystem prerequisite/corequisite analysis microcode/firmware compatibility matrices and regression risk assessments.
. Manage system level configurations including dynamic tuning system values Workload Groups Subsystem Descriptions (SBSD) Class parameters and memory pool allocations.
. Oversee system initialization scripts startup programs (QSTRUP) subsystem routing architectures and operational configurations.

3. Power Systems Architecture PowerVM & VIOS Engineering

. Architect configure and maintain enterprise IBM Power Systems hardware (Power9 Power10) managed via redundant Hardware Management Consoles (HMC).
. Design and implement PowerVM virtualization solutions including Virtual I/O Server (VIOS) clustering Shared Ethernet Adapter (SEA) failover and NPort ID Virtualization (NPIV) SAN mapping.
. Engineer enterprise LPAR topology configuring shared processor pools capped/uncapped partitions Virtual Processors and dynamic processor/memory optimization.
. Lead HMC firmware lifecycles service processor firmware upgrades and disaster recovery replication for HMC configurations.

4. Enterprise HA/DR Architecture & Disaster Recovery Orchestration

. Design implement and fine tune enterprise High Availability (HA) replication architectures using solutions such as Precisely MIMIX IBM PowerHA SystemMirror or Maxava HA.
. Architect journal environments: Remote Journaling (RJ) asynchronous/synchronous network transport dual journal receivers and threshold management.
. Architect and lead scheduled enterprise Disaster Recovery (DR) and full role swap (switchover / failover) tests guaranteeing stringent Recovery Time Objectives (RTO) and Recovery Point Objectives (RPO).
. Develop and maintain automated failover scripts audit validation procedures and emergency split brain recovery playbooks.

5. Storage Engineering IASP & Resiliency Architecture

. Architect auxiliary storage topologies balancing internal NVMe/SAS drives and external SAN arrays (IBM FlashSystem DS8000) using San Volume Controller (SVC).
. Implement and manage Independent Auxiliary Storage Pools (IASP) to isolate databases for modular switchover and flash copy operations.
. Formulate enterprise wide BRMS (Backup Recovery and Media Services) architecture including network synced BRMS clusters media lifecycle policies and VTL encryption.
. Author and validate bare metal disaster recovery procedures cold start installation plans and full scale recovery runs (SAVSYS / Option 21 rebuilds).

6. Advanced Performance Tuning Profiling & Capacity Planning

. Conduct deep tier system performance profiling utilizing IBM i Performance Data Investigator (PDI) Collection Services Job Watcher Disk Watcher and IBM i Doctor.
. Optimize system memory allocation by tuning dynamic system values (QPFRADJ) defining private memory pools and resolving object lock contention.
. Analyze disk subsystem bottlenecks arm contention queue depths and optimize paging space allocation.
. Formulate multi year capacity planning models predicting CPU (CPW) memory and SAN storage expansion aligned with corporate business growth.

7. Security Hardening Audit Forensics & Compliance Architecture

. Architect and enforce OS security hardening in accordance with IBM i Security Level 40 and 50 standards.
. Establish comprehensive security auditing architectures via QAUDJRN configuring journal filters for security critical actions and unauthorized object manipulation.
. Implement adopted authority controls secure system values (QSECURITY QPWD* QALWUSRDMN) and service program access controls.
. Drive compliance and vulnerability management programs (SOX PCI DSS ISO 27001) designing automated scripts to remediate non compliant configurations.

8. Infrastructure Automation Modernization & Technical Mentorship

. Architect reusable operational automation utilizing advanced Control Language (CL) programs and modern Db2 for i / IBM i Services (QSYS2).
. Evaluate and implement modern administration frameworks such as IBM i open source integration (PASE Bash Python) Ansible for IBM i automation and REST APIs.
. Serve as the technical mentor and escalation lead for L1 and L2 system administrators conducting peer technical reviews and establishing enterprise engineering standards.
. Participate in architectural review boards (ARB) for major business applications and enterprise infrastructure projects.




Required Qualifications

. Education: Bachelors or Masters degree in Computer Science Computer Engineering Information Technology or equivalent industry experience.
. Experience: Minimum of 610 years of dedicated hands on enterprise experience in IBM i (AS/400) System Engineering Power Systems Architecture and L3 Support.
. Environment Experience: Proven track record architecting and supporting large scale enterprise environments (30 LPARs multi system Power9/Power10 estates petabyte scale storage and critical transaction banking/retail/logistics systems).




Required Technical Skills

. Operating System Mastery: Deep internal architecture knowledge of IBM i (releases 7.2 through 7.5) LIC SLIC Microcode Machine Check handling and SST/DST forensics.
. OS Migration & Lifecycle: Proven leadership in executing complex OS release upgrades (e.g. 7.3 > 7.4 > 7.5) and comprehensive Technology Refresh (TR) deployments.
. Hardware & Virtualization: Advanced architecture experience with IBM Power9/Power10 redundant HMCs PowerVM dual VIOS configurations NPIV SEA and dynamic LPAR allocation.
. High Availability & DR: Mastery of enterprise HA solutions: MIMIX or PowerHA SystemMirror; comprehensive design of Remote Journals data synchronization engines and full site to site role swaps.
. Storage & Resiliency: Architecture of IASP SAN attached storage (SVC/FlashSystem) Multipath I/O bare metal restore procedures and enterprise wide BRMS network cluster management.
. Deep Diagnostics & Performance: Proficiency with Collection Services Performance Tools (PT1) PDI Job Watcher Disk Watcher IBM i Doctor and MSD analysis.
. Security & Auditing: Security Level 40/50 enforcement deep QAUDJRN forensics authorization list architecture and audit remediation.
. Automation: Advanced CL programming complex QSYS2 / Db2 for i SQL Services and exposure to Ansible for IBM i or shell scripting.
. Service Frameworks: Mature understanding of ITIL Problem Management Change Governance and Architectural Standards.




Preferred Qualifications

. IBM Certified System Administrator / Solution Architect IBM i.
. Certified High Availability Professional (e.g. Precisely Certified MIMIX Professional).
. Direct experience architecting IBM i within Hybrid Cloud environments (e.g. IBM Power Virtual Server / PowerVS on IBM Cloud).
. Deep experience in Ansible automation for IBM i system administration.
. ITIL Intermediate or Expert Certification.




Key Competencies

. Masterful Diagnostic Mindset: Exceptional ability to deconstruct complex multi tiered infrastructure failures spanning OS hypervisor SAN network and application code.
. Decisive Crisis Leadership: Ability to take total technical command during critical production outages and execute high risk recovery actions under executive visibility.
. Strategic Infrastructure Vision: Capacity to balance immediate operational reliability with multi year modernization and platform automation goals.
. Technical Mentorship & Advocacy: Passion for uplifting team capabilities mentoring L2 engineers and evangelizing modern IBM i administrative patterns.e with global engineering teams and operational hubs across multiple time zones.

• AS400 Mapping iSeries
• Azure
• DB2 for z/OS
• IBM AS400 Ldprx
• IBM Cloud

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