Tamilselvam V
Linux Adiministrator
Chennai
Summary
Experienced Linux System Administrator with over 13 years in IT, including 7 years specializing in enterprise Linux and UNIX systems such as Redhat Linux servers, OEL, and AIX. Proficient in deploying and managing Linux-based servers across both on-premises and Azure cloud environments, with strong expertise in cloud resource provisioning, scaling, and automation. Known for delivering high-performance, secure, and resilient systems in dynamic, mission-critical infrastructures. Recognized for ensuring stability and efficiency in high-demand enterprise environments.
Overview
14
14
years of professional experience
4
4
years of post-secondary education
2
2
Certifications
Work History
Linux System Administrator
Kyndryl Solutions Private Limited
Chennai
06.2022 - Current
- Remotely managed 2,000+ UNIX servers across two European data centers
- Administered RHEL 7/8/9 including OS installation, patching, and application configuration.
- Performed OS patching on AIX 7.3
- PowerHA cluster patching, failover, and fallback operations.
- File system Management via LVM as per request.
- Scheduled
- handled incident and change management via ITIL-based tools such as ServiceNow and Maximo.
- Analyzed and resolved repetitive alerts by addressing root causes, leading to significant alert reduction.
- Involved in deployment of RHEL-based physical servers, kernel tuning, and system hardening activities.
- performed hardware firmware upgrades on Dell and Lenovo x86 servers.
- Migrated ASM disks from IBM storage to Pure Storage at the OS level with minimal downtime.
- Coordinated and worked with onsite data center team and vendors during hardware outage.
- Installed and configured OS monitoring and vulnerability scanning tools as per client compliance requirements.
- Developed simple Ansible playbooks to automate data collection tasks across remote Linux servers.
- Actively participated in major incident resolution, engaging with customers to restore services within defined SLAs.
- Managed user ID lifecycle activities, including creation, deletion, and privilege assignment based on approved requests.
- Enabled, configured, and fine-tuned NFS services across enterprise Linux environments.
- Diagnosed and resolved system performance issues by identifying bottlenecks and applying vendor-recommended best practices.
- Collaborated closely with customers during major application deployments and change implementations to ensure smooth transitions and minimal disruption.
- Created and deployed Rsyslog server for centralized log retention from different devices across the network.
- Participating in on-call rotations, providing prompt response to critical incidents affecting production environments.
Linux System Administrator
Hexaware Technologies
Chennai
08.2021 - 06.2022
- Supported end-to-end migration of Linux servers from on-premises infrastructure to Microsoft Azure.
- Successfully migrated 400+ Oracle Linux 7 servers to the Azure platform.
- Re-hosted 100+ Oracle Linux 7 servers, ensuring minimal downtime and seamless integration.
- Configured Azure Network Security Group (NSG) firewall rules for secure Linux server access.
- Managed incidents and performance tuning during the hyper-care phase post-migration.
- Implemented server backup strategies using Azure Backup services.
- Created detailed technical documentation outlining issues encountered during the migration and the corresponding mitigation actions taken, ensuring knowledge transfer and future reference.
Unix Administrator
IBM India Private Limited
Chennai
06.2015 - 07.2021
- Managed 2000 linux and 100+ Aix servers
- Administered RHEL 7/6, SUSE, and AIX 7.2/7.1, including installation, patching, and application configuration.•
- Planned and implemented upgrades to system hardware and software.
- Monitored system utilization using tools like vmstat, iostat, topas, nmon, and errpt.
- Executed PowerHA cluster patching, failover, fallback activities, and cluster file system management.
- Performed Dynamic LPAR (DLPAR) operations for resource allocation.
- Installed software and applied patches on AIX and RHEL servers following the ITIL process.
- Handled automated and user-raised P1 and P2 incidents.
- Scheduled routine jobs using CRON.
- Automated repetitive tasks using shell scripts.
- Raised NCIs (Non-Compliance Issues) for identified deviations and implemented mitigation measures.
- Performed server hardening as per agreed technical specifications with the customer.
- Worked with ITIL-based ticketing tools such as ServiceNow and Maximo.
- Identified security vulnerabilities using the BigFix automation tool.
- Highlighted and documented security threats and operational risks.
- Performed user administration on Unix servers (AIX and Linux).
- Experienced in designing Backup and Recovery strategy and implementation and maintenance using RSYNC & TAR utilities
- Proficient in working with a wide range of system and network services, including FTP, TCP/IP, NFS, CIFS, SSH, NTP, kdump, routing, DHCP, DNS, VNC, network bonding, and auditing tools.
Customer Support Engineer
USAM Technology Solutions Private Limited
06.2011 - 03.2015
- Hands-on experience in the deployment and maintenance of Linux & Windows servers.
- Installed and configured multiple Linux distributions, including Red Hat Linux, CentOS, and Ubuntu.
- Installed and configured Windows Server and Desktop operating systems with required applications & services as per client request.
- Managed user ID administration on both Linux and Windows operating systems.
- Configured and maintained hardware firewalls, including SonicWall.
- Maintained application servers running OpenSVN.
- Deployed newly procured Linux x86 servers from scratch in data centers.
- Assisted in planning and cabling of Network devices in data centres.
- Managed Critical incidents effectively by coordinating with vendors and client .
- Created Technical Documents on common issues observed to help internal team and customer to resolve issues faster
Education
Bachelor of Science - Computer Science
St. Joseph Arts & Science
Chennai 06.2006 - 03.2009
Higher Secondary Education - Science
Rex Matriculation Higher Secondary School
Chennai, India 06.2004 - 03.2005
Matriculations Exams - Science Education
ST Johns Matriculation Higher Secondary School
Chennai, India 06.2002 - 03.2003
Skills
OS : Red Hat Enterprise Linux 9/ 8/7, OEL 7, 8,IBM AIX 72/71
Performance Monitoring Tools: Topas, Vmstat, Nmon, Iostat,Sar
Ticketing Tools: ServiceNow, Maximo
Server Hardening and Remediation
User and group management
Patch Management via YUM
Filesystem Management via LVM
Firewalld and Nmcli on Network configuration
Services: NFS,FTP,SSH,SYSLOG
Certification
Red Hat Certified Engineer - 160 -039-764
Timeline
Red Hat Certified Specialist in Containers - 160 -039-764
12-2024
Red Hat Certified Engineer - 160 -039-764
03-2024
Linux System Administrator
Kyndryl Solutions Private Limited
06.2022 - Current
Linux System Administrator
Hexaware Technologies
08.2021 - 06.2022
Unix Administrator
IBM India Private Limited
06.2015 - 07.2021
Customer Support Engineer
USAM Technology Solutions Private Limited
06.2011 - 03.2015
Bachelor of Science - Computer Science
St. Joseph Arts & Science
06.2006 - 03.2009
Higher Secondary Education - Science
Rex Matriculation Higher Secondary School
06.2004 - 03.2005
Matriculations Exams - Science Education
ST Johns Matriculation Higher Secondary School
06.2002 - 03.2003
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