Senior Linux System Administrator at Prodevans Technology Pvt Ltd (2025-10 – Present)
- Administer and maintain RHEL 7/8/9 servers across a 3,000+ node enterprise banking environment, ensuring 99%+ uptime under strict SLA commitments.
- Perform in-place OS upgrades from RHEL 7→8 and 8→9 using the LEAPP utility on both VMs and physical servers, including Dell BIOS and firmware upgrades.
- Develop and maintain Ansible playbooks to automate server provisioning, patching, and configuration management, reducing manual effort by ~40%.
- Configure and manage LVM (PVs, VGs, LVs) for flexible storage provisioning; extend logical volumes and file systems with zero downtime.
- Install and configure security and monitoring agents: DS Agent, SIEM, DAM, and additional compliance agents per banking security standards.
- Handle incident management: analysis, troubleshooting, resolution, and post-incident RCA reporting.
- Performed change implementation activities as per approved change requests.
- Created and updated POA (Plan of Action) in Server Manager for planned and unplanned activities.
- Closed requests received from RF after validation and successful completion.
- Scheduled cron jobs for job automation.
- Manage user accounts, groups, sudo permissions, ACLs, and file access controls as per security policies.
- Performed hardening and security baseline implementation on all Linux servers following CIS benchmarks.
- Performed monthly OS patching using Red Hat Satellite for enterprise Linux servers.
- Perform system performance monitoring using top, ps, netstat, iostat, and cpuinfo; proactively address CPU, memory, and disk bottlenecks.
- Maintain scheduled backups using tar and gzip; execute Data Center (DC) to Disaster Recovery (DR) drills.
System Engineer (Linux) at Tata Consultancy Services (TCS) (2023-04 – 2025-09)
- Managed 80+ RHEL Linux servers with 99% uptime, covering monitoring, user administration, disk management, access control, performance, and troubleshooting.
- Led OS upgrade project for 80+ servers from RHEL 7 to RHEL 8, completing all upgrades with zero production incidents.
- Automated routine operational tasks using Ansible and Bash shell scripts, reducing ticket resolution time by ~30%.
- Performed monthly RHEL patching using BMC Patch Management tool across all managed servers within defined maintenance windows.
- Installed and configured DS Agent, DAM Agent, and Splunk (SIEM) services on all servers per SBI security compliance requirements.
- Managed LVM configuration, logical volume extension, and file system operations for production databases and application servers.
- Administered user accounts (create/modify/delete), password policies, sudo rules, and ACL permissions aligned to least-privilege principles.
- Performed hardening and security baseline implementation on all Linux servers following CIS benchmarks.
- Troubleshot network connectivity, space issues, memory utilization, and boot failures; escalated P1 incidents with RCA within SLA.
- Mentored L1 engineers, conducted knowledge-transfer sessions, and groomed new team members to work independently within 3 months.
- Executed Data Center (DC) to Disaster Recovery (DR) drills; collaborated with application owners and security teams on vulnerability remediation.
Linux System Administrator at Dolat Capital (Nirshilp Security Pvt. Ltd.) (2023-02 – 2023-04)
- Monitored all applications, servers, network connectivity, storage, database connectivity, daily backups, and scheduled script execution for a trading firm.
- Maintained near-zero downtime for trading applications; communicated real-time updates to traders during any service degradation.
- Configured LVM and managed volumes; coordinated with development, networking, and IT teams to resolve issues quickly.
- Maintained incident log and resolution knowledge base for future reference and faster recovery.
Senior Analyst — Linux Administration at Capgemini India (2021-06 – 2022-08)
Client: PSA Bank, France.
- Performed daily health checks on disk, CPU, and memory utilization across Linux/Unix production servers.
- Conducted vulnerability scanning, applied security patches, and implemented server hardening for a French banking client.
- Provided RCA reports for production incidents; collaborated with development and application teams for automated daily tasks.
- Managed user accounts with ACL permissions; configured logical volumes and performed file system operations.
- Handled 24x7 production monitoring and incident resolution; used Uniview for job scheduling and resource management.
- Upgraded server resources based on service requests; troubleshot network issues and escalated alerts to relevant support groups.
Associate — Linux Systems at One97 Communications Ltd. (Paytm) (2019-08 – 2021-06)
- Administered user and group permissions; installed RPMs, applied patches, and managed software packages on Linux servers.
- Monitored system logs and performed routine health checks; configured IP addresses and resolved networking issues.
- Managed LVM partitions and file system operations; performed regular backups using scp, rsync, and tar.
- Conducted server uptime checks and login audits; supported infrastructure for high-availability payment processing services.
