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.

• Install, configure, administer, and maintain IBM AIX servers in enterprise environments
• Perform AIX OS administration, kernel management, and LVM management
• Manage user administration, security policies, password, and identity management
• Administer system services such as NIS, NFS, Samba, and printer services

• Strong expertise in PowerVM / VIOS, HMC, and AIX virtualization
• Build and administer VIOS servers
• Manage HMC administration and upgrades (Version 9 & 10)
• Deep knowledge of Power8, 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 with NPIV and SAN‑attached storage

• Perform AIX server build and configuration using best practices
• Manage NIM (Network Installation Manager) for OS deployment and maintenance
• Execute OS patching, upgrades, and VIOS upgrades
  
  
  • Lead and execute AIX OS migrations: 6.1, 7.1, 7.2, 7.3.
• Perform hardware refresh, storage migration, and platform migrations
• Experience in pSeries hardware commissioning and implementation

• Analyze resource utilization and system performance
• Perform performance tuning and capacity planning
• Strong experience in storage management, SAN environments, and HA concepts
• Design and support Fault Tolerant systems, Business Continuity, and Disaster Recovery planning

• Act as final escalation point for complex AIX and hardware‑related issues
• Strong in hardware and OS‑level troubleshooting
• Lead Major Incident troubleshooting and RCA
• Perform trend analysis, identify recurring issues, and drive corrective actions
• Coordinate with hardware vendors for issue resolution
• Plan, schedule, and execute changes; coordinate with cross‑functional stakeholders
• Prepare weekly and monthly operational status reports
• Adhere to ITIL processes, quality, and security standards

• Develop Shell / Perl scripts to automate day‑to‑day administration tasks
• Maintain and update technical documentation, SOPs, and knowledge base
• Support continuous knowledge acquisition and documentation updates

• Provide technical 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 in rotational shifts and on‑call support models

• 8-12+ years of hands‑on experience in IBM AIX and pSeries administration
• Deep understanding of IBM AIX OS and Power Systems architecture
• Strong experience with PowerVM, VIOS, HMC
• Excellent troubleshooting skills for OS and hardware issues
• Strong scripting skills (Shell, Perl)
• Experience in enterprise production environments

• IBM Certifications in:
  
  
  • AIX System Administration
  • pSeries Hardware
  • Performance Tuning
  • Network Administration
• Experience in large, mission‑critical environments
• Exposure to hybrid or cloud‑integrated IBM Power workloads

• 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