Senior System Engineer

Job Description – AIX L3 System Administrator

About Us

Ensono is a hybrid IT services provider that sees a world in transformation. We understand the world of business has become more complex, layered, and interdependent because we’re enabling the IT infrastructure for that transformation. Our clients are some of the most innovative and forward-thinking companies in the world and we help keep their businesses thriving. With nearly 50 years of experience, we optimize and modernize IT infrastructure by amplifying the power of mainframes and mid-range servers with the agility of cloud. Check us out at www.ensono.com.

Job Summary

The AIX L3 System Administrator is responsible for expert‑level administration, engineering, and support of IBM AIX and pSeries environments. This role acts as the highest technical escalation point, owning complex troubleshooting, performance tuning, migrations, virtualization, and lifecycle management while ensuring system stability, security, and availability in mission‑critical environments.

Key Responsibilities

AIX & pSeries Administration

• Install, configure, administer, and maintainIBM AIX servers in enterprise environments

• PerformAIX OS administration, kernel management, and LVM management

• Manageuser administration, security policies, password, and identity management

• Administer system services such asNIS, NFS, Samba, and printer services

Virtualization & Power Platform

• Strong expertise inPowerVM / VIOS, HMC, and AIX virtualization

• Build and administerVIOS servers

• ManageHMC administration and upgrades (Version 9 & 10)

• Deep knowledge ofPower8, Power9, and Power10/11 pSeries architectures

• Expert understanding of:

  • DLPAR

  • LPM (Live Partition Mobility)

  • Virtual networking

  • Virtual storage

  • SR‑IOV, vNIC adapters

• Hands‑on experience withNPIV and SAN‑attached storage

Build, Migration & Lifecycle Management

• PerformAIX server build and configuration using best practices

• ManageNIM (Network Installation Manager) for OS deployment and maintenance

• ExecuteOS patching, upgrades, and VIOS upgrades

  • Lead and executeAIXOS migrations: 6.1, 7.1, 7.2, 7.3.

• Performhardware refresh, storage migration, and platform migrations

• Experience inpSeries hardware commissioning and implementation

Performance, HA & DR

• Analyzeresource utilization and system performance

• Performperformance tuning and capacity planning

• Strong experience instorage management,SAN environments, andHA concepts

• Design and supportFault Tolerant systems,Business Continuity, andDisaster Recovery planning

Incident, RCA & Operations

• Act asfinal escalation point for complex AIX and hardware‑related issues

• Strong inhardware and OS‑level troubleshooting

• LeadMajor Incident troubleshooting and RCA

• Performtrend analysis, identify recurring issues, and drive corrective actions

• Coordinate withhardware vendors for issue resolution

• Plan, schedule, and execute changes; coordinate with cross‑functional stakeholders

• Prepareweekly and monthly operational status reports

• Adhere toITIL processes, quality, and security standards

Automation & Documentation

• DevelopShell / Perl scripts to automate day‑to‑day administration tasks

• Maintain and updatetechnical documentation, SOPs, and knowledge base

• Support continuousknowledge acquisition and documentation updates

Leadership & Collaboration

• Providetechnical SME support across projects and operations

• Work closely with application, database, storage, network, and cloud teams

• Communicate effectively with interdisciplinary technical and non‑technical teams

• Work inrotational shifts and on‑call support models

Required Skills & Experience

• 8–12+ years of hands‑on experience inIBM AIX and pSeries administration

• Deep understanding ofIBM AIX OS and Power Systems architecture

• Strong experience withPowerVM, VIOS, HMC

• Excellent troubleshooting skills forOS and hardware issues

• Strong scripting skills (Shell, Perl)

• Experience inenterprise production environments

Preferred Qualifications

• IBM Certifications in:

  • AIX System Administration

  • pSeries Hardware

  • Performance Tuning

  • Network Administration

• Experience inlarge, mission‑critical environments

• Exposure tohybrid or cloud‑integrated IBM Power workloads

Professional Attributes

• Strong analytical and problem‑solving skills

• Ability to diagnose and resolve issues quickly under pressure

• Excellent communication and documentation skills

• Proactive, detail‑oriented, and ownership‑driven mindset

• Team‑oriented approach with mentoring and knowledge‑sharing attitude

Shift timing- 1:30 PM to 10:30 PM

We are an equal opportunity employer. All qualified applicants will be considered for employment without regard to caste, colour, creed, religion, gender, gender identity, sexual orientation, age, disability, HIV status, or any other status protected by law. Candidates with disabilities who require accommodations during the recruitment process are encouraged to contact our Talent Acquisition team to place a request.