Satheeshkumar Vaithilingam

Having 14+ years of experience in IT industries (4+ Years in Trianz Digital Consulting Pvt.Ltd working as a Senior Technical Lead and 6+ Years in TCS working as an Assistant Team Lead and 3 Years in WIPRO ) with UNIX System Administration With a brilliant professional record and I aspire to join as a leading System Administrator where in my diligence and extensive expertise contribute to the growth of the organization.

Senior Technical Lead - Trianz Digital Consulting Pvt.Ltd

Enterprise Systems Administrator and Technical Lead specializing in IBM AIX, Red Hat Enterprise Linux (RHEL), PowerVM hypervisors, and server automation. Responsible for end-to-end server lifecycle management, security vulnerability remediation, infrastructure delivery, and large-scale enterprise automation.

• Managed and maintained complex enterprise IBM AIX (6.x/7.x) and RHEL (6/7/8/9) server environments, ensuring high availability and system stability.
• Administered IBM PowerVM hypervisors, Hardware Management Console (HMC), Virtual I/O Servers (VIOS), and Logical Partitions (LPARs).
• Handled high-volume operational demands, successfully processing over 1,060+ Change Requests (CRs), server builds, and system decommissions.
• Configured and debugged virtual networking and storage, including Shared Ethernet Adapters (SEA), VLAN tagging, Virtual Fibre Channel (vFC/NPIV), and SAN multipathing.
• Led security compliance initiatives, successfully identifying and resolving 1,000+ system and security vulnerabilities across enterprise server fleets.
• Executed enterprise-wide OpenSSL and TLS protocol/cipher upgrades to meet strict corporate security standards.
• Managed Centrify DirectControl agent deployments and SSH daemon integrations for centralized enterprise authentication.
• Developed, optimized, and deployed automated Bash and KornShell (ksh) scripts for routine system administration tasks.
• Created modular automation tools for bulk filesystem creation, volume group mirroring, system health checks, and user account management.
• Streamlined system configuration management across RHEL environments using NetworkManager keyfiles and custom systemd services.
• Provided technical leadership on cross-functional infrastructure projects, system migrations, and kernel parameter tuning (e.g., THP/Grubby).
• Coordinated with global architecture, network, and storage teams to execute complex infrastructure changes with minimal downtime.
• Authored Standard Operating Procedures (SOPs) and technical documentation to standardize team workflows and operational hygiene.

IT analyst ( Assistant Team Lead ) - TCS

(2015)

Client: New York Life Insurance Ltd. Environment: UNIX - Linux, AIX & Solaris.

• Updating Day to day Activities/Issues in the Daily status report in the Customer Call from Unix end.
• Worked on RHEL 6 to 7 Migration for more than 50+ servers including Prod and Non prod Servers
• Worked on more than 35+ servers for DB Migration from physical to Virtual servers Including Prod and Non Prod servers.
• Worked on More than 100+ Appliance server builds with OVA file , ISO file and Disk file.
• Worked on Linux RHEL 6, 7 & 8 server build More than 500+ servers include Production and Non production servers.
• I have worked on OS patching for Linux, AIX & Solaris (More than 600+ servers )
• Involved DR activity and Moved the servers from one Data Center to another data Center for both Physical and Virtual servers.
• Worked on Storage Reclaim Activity and UCS Move activity for the project Activity.
• Installation and Configuration of Linux servers Maintenance and system Administration.
• Provisioned and Configured Linux Operating systems on VMware ESXi Platform
• Strong Technical background in Logical Volume Manager Configuration which involves creating, modifying file system related activities and handling LV,PV,VG in LVM.
• Working Experience in Increase/reduce system resource like CPU/RAM in VM’s
• Having Good Experience on OS related networking like Assigning IP/Gateway/Netmask/VLAN and troubleshooting regular issues.
• Assigning and reserving a IP address in the infoblox for new server build.
• Migrate a virtual server from One ESXi Host to Another ESXi Host.
• Assigning Existing Disk, New disk, New network adapter, RDM disk,CD/ROM device to Virtual servers in the VMware console.
• Taking/Managing snapshots on OS level and disk level for system upgrade activity.
• Administrate the faulty hardware parts - System Boards,disk,Power supply , Memory and drives by coordinating with Vendors.
• Managing package installation/upgrade using YUM and RPM
• Investigating the System Logs and identifying the hardware/Software related issues.
• Experience in Performance tuning ,networking,system security,IO monitoring and analysis.
• User Management - User creation,Deletion, Password Management and User/Group Permission related Experience and Knowledge
• OS Hardening and working with Security related settings.
• Handling the User/Group account Locally and Centrify.
• Handling SUDO permissions for user/group based on project requirements.
• Handling and Managing Virtual servers in VMware/Vsphere console.
• Changing/Modifying Kernel Parameters based on application requirements.
• Configuring and Managing VXVM ( Filesystem, DG, Disk Management)
• Good working Experience In VCS concept in two mode cluster)
• Troubleshooting the day- to-day issues in ALL servers (Linux, AIX, Solaris).
• Analyzing the Log files and Checking the error report and taking proactive action to resolve the issues.
• Provided customer support,help/troubleshoot users to resolve servers, Networking and other system-wide problems.
• Troubleshoot and coordinate with other teams like storage team, backup team, Network team, DBA team and Middleware team and all application team to fix the UNix related Issues.
• Administration of AIX 5.3, 6.1, 7.1 Servers.
• Creating and managing Paging Space.
• Analysis on errors from HACMP machines.
• Knowledge about user administration related task..
• Working Knowledge in vio concepts.
• LPAR Creation, OS installation and Configuration
• Technology level upgrade.
• Configuring HACMP on AIX servers.
• Administration of VIO Servers and Creation of VLPARs and Managing DLPARs
• Troubleshooting HACMP Cluster issues.
• Performing the Servers move from LPAR to VLPAR, LPAR to LPAR,VLPAR to VLPAR & LPM.
• RRT(Regular Restoration Testing)

Project Engineer - WIPRO

(2012 - 2015)

Client: Nestle. Environment: AIX with VIO servers, HACMP cluster.

• Handling day-to-day AIX/HACMP/VIO issues. Creating volume groups, logical volumes, filesystems and NFS mounts in cluster and standalone systems, Creating, changing and deleting file systems in AIX/HACMP environment.
• Backup Administration, File system Backup and Application Backup Operating System Backup through mksysb and TSM.
• Creation and installation of LPAR and virtualized partitions.
• OS level migration using Alternate disk method and OS TL upgrade using multibos method.
• Setting up NFS servers, exporting shares to clients, performing NFS mounts and troubleshooting.
• NIM Management/Managing physical servers in HMCand OS installation and upgrade on AIX servers.
• PowerHA Administration:Configure and Install / Upgrade High Availability / Clustering environment. C-SPOC activities like Start/Stop Cluster services, Resource Group and Concurrent Logical Volume Management.
• Virtual I/O Server administration activities: Create VIO server partition and Install the VIO software. Creating a Shared Ethernet Adapter and Setting up virtual SCSI disks and virtual optical devices.
• Carrying out scheduled tasks and planned outages and Adherence to SLA.
• Worked on Incident Management & Request Management tickets generated in Service manager tool.
• Server Decommissioning and updating server details CMDB Inventory.
• File system management and monitoring like increasing FS size, removing old files after taking backup, and compressing files for space management.
• Managing paging space, changing attributes of paging space, increasing paging space.
• Network File system Administration for Servers and Clients, Exporting File systems, Tr