Jagan mohan Reddy

IT professional with around 5 years of experience in AIX System Administration, specializing in server build, configuration, and support in enterprise environments. Hands-on experience in AIX OS installation, customization, LPARs, HACMP clustering, NIM, and VIO environments. Strong exposure to incident, alert, and change management processes in production systems.

System Administrator at Kyndryl (2022-02 – Present)

AIX / Linux System Administrator managing enterprise infrastructure with focus on OS upgrades, LPAR management, and high availability solutions.

• Performed AIX OS upgrades from AIX 7.1 to AIX 7.2 on production servers
• Executed online DLPAR operations without service disruption
• Created and managed file systems, troubleshooting mount point issues
• Hands-on experience in Technology Level (TL) upgrades using multiple upgrade methods
• Performed Linux mount point expansion and memory utilization checks
• Worked extensively on Linux LVM activities (PV, VG, LV management)
• Executed OS patching activities across AIX and Linux servers
• Performed AIX OS upgrades from AIX 6.1 to AIX 7.1 on enterprise servers
• Installed and configured AIX Operating System using installation media and NIM server
• Installed VIO servers and created/managed LPARs
• Performed online DLPAR operations, including dynamic changes to CPU and memory
• Managed LPAR processor settings (minimum, maximum, desired processors and memory)
• Worked with dedicated and shared processors, virtual processors, processing units, and shared processor pools
• Performed mirrorgv creation, disk migration, and storage movement activities
• Troubleshot file system and mount point issues
• Applied Access Control Lists (ACLs) to allow multi-user access
• Took regular system backups using mksysb
• Performed HA failover testing by moving resource groups between cluster nodes
• Troubleshot backup failure issues
• Installed and configured IBM Tivoli Monitoring tools
• Handled incident tickets, performed root cause analysis, and managed escalations
• Actively involved in BAU activities, including Change Management and RFS activities
• Installation, administration, and troubleshooting of Linux (RHEL) systems
• Managed Linux LVM activities: creating and extending VGs, LVs, and file systems
• Performed Linux OS patching and migration
• Created and managed user accounts, groups, and access levels using SUDO
• Monitored system health, disk utilization, and web server availability using Nagios
• Scheduled and managed automated jobs using Crontab
• Troubleshot OS-level and hardware-related issues
• Monitored and optimized system performance, including CPU, memory, virtual memory, swap space, and disk utilization
• Raised and coordinated hardware support calls with IBM vendors
• Created and managed user accounts, groups, home directories, and password administration

System Administrator at Tech Mahindra (2020-10 – 2021-08)

System Administrator responsible for AIX and Linux system administration, performance monitoring, and incident management in production environments.

• Monitored system performance, including CPU, memory, disk, and network utilization using tools such as topas, sar, vmstat, iostat, and netstat
• Performed Linux OS updates and patching on production servers
• Managed paging spaces, including creation, increase, and decrease based on system requirements
• Executed backup activities, including rootvg system backups, user-defined volume group backups, and file system-level backups
• Performed user password resets and Technology Level (TL) patching
• Troubleshot OS-level and hardware-related issues
• Monitored and optimized virtual memory, swap space, CPU, and disk utilization
• Implemented, configured, and managed NFS services
• Configured LVM and managed volume groups, logical volumes, and file systems
• Worked with ITIL processes, primarily Incident Management
• Compressed files and directories using gzip
• Part of Incident Management (IM) team, resolving production outages and ensuring resolution within SLA timelines
• Installed, administered, and troubleshot Linux Operating Systems
• Worked extensively with a ticketing-based support system
• Resolved boot-related issues, including working with boot lists, SMS mode, and bosboot
• Configured and troubleshot Network File Systems (NFS) and network-related issues
• Performed alternate disk installation during OS upgrades and patching activities
• Troubleshot performance-related issues across CPU, memory, network, and storage
• Managed AIX disk storage, including physical and logical volume configuration and maintenance

MBA – Osmania University (2014)