👨‍💻 Prasanna

1. Trianz, Bangalore | Senior Technical Lead (Jan 2024 – Dec 2025)

Apply all pending OS updates, including security patches, kernel updates, and performance enhancements.
Deploy the latest security patches to mitigate vulnerabilities and protect systems from cyber threats.
Upgrade server packages, dependencies, and configurations to ensure compatibility, stability, and performance improvements.
Perform validation checks, reboot servers if needed, and monitor logs for any anomalies post-update.
Ensure data backups are in place before updates and have a rollback plan in case of critical failures.
Ensure the OS level validations like file systems mounted, services running, and ports open etc.
Create & maintain separate repositories for RHEL8, 9 & 10 and schedule the regular sync.
Maintain Ansible playbooks for full patching, security patching, and automation tasks from ansible-cli and tower.
Simple automation tasks with Python Paramiko module on Linux servers, like daily reports and monitoring dashboards.
Backing up the router and other network devices configuration files into Linux server with Python netmiko module.
Health check reports on all Linux servers using Python script.
Vulnerability mitigation with respect to the Rapid7 tool suggestions from the security team.

2. Future Focus Infotech | Technical Lead (Aug 2022 – Apr 2023)

Take care of vulnerability remediation via periodic patching through weekly CABs:

Coordinated patching with DB team for quarterly periodic reboots
PHP upgrade on Windows servers:

Created Confluence documentation for VMware Tools upgrade on CentOS 7
Developed simple playbooks in Git to fetch server details:

Handled monthly PagerDuty shifts and resolved on-call issues
Commissioned new CentOS 7 servers using Terraform code provided by DevOps team
Performed physical builds for DB team
Managed decommissioning of servers not remediated from critical vulnerabilities and ensured proper migration

3. QuessCorp on Wipro, Bangalore. SME on Linux (Apr 2021 – Mar 2022)

Patching CentOS/RedHat systems via Red Hat Satellite server using Ansible playbooks
Managed monthly vulnerability remediation across Linux environments
Improved server hardening for both existing and newly provisioned instances
Created dynamic dashboard using shell script to report backup status and file sizes
Developed daily health check script that generates Excel reports
Performed REIP project analysis and integrated data telemetry for system insights

4. IBM India Pvt. Ltd, Bangalore. SME on Linux(Jan 2020 – Mar 2021)

Performed periodic vulnerability remediation via patching based on CVEs provided by the security team
Executed patching through Red Hat Satellite server
Configured Kickstart servers for hands-free workstation installation with custom profiles, scripts, and package suites
Developed shell automation scripts and beginner-level Ansible patching playbooks
Handled AWS daily operations including load balancer changes, CloudWatch alarms, and monitoring tasks
Resolved day-to-day tickets involving:
- LVM and swap analysis/expansion
- User creation and parameter modification
- Disk space monitoring and coordination for filesystem expansion or housekeeping
Managed CRs and weekend on-call duties as per team roster
Coordinated with vendors for patching and firmware upgrades on ILO and iDRAC interfaces
Created internal monitoring dashboards using shell scripts for pre-monitoring team visibility
Monitored Nagios, Dynatrace, and ScienceLogic dashboards
Applied basic networking knowledge to set up VLANs and gateways with support from storage and network teams

5. Schneider, Electric R&D, BGRT, Bangalore via Techsystems, Run Expert (Apr 2019 – Dec 2019)

Monitoring Nagios, Dynatrace, and CloudWatch tools; taking necessary actions to rectify alerts
Installation and maintenance of Apache; coordinating with application teams during release cycles
Vulnerability management using OpenSCAP and OpenVAS scanning tools
Periodic vulnerability remediation based on Rapid7 Nexpose recommendations from the security team
Handling L3 requests from the Run team Jira queue
Coordinating patching activities for RedHat and Windows systems with the CloudOps team
Collaborating with the DevOps team for Dynatrace and other agent installations
Monitoring and maintaining AWS run environments
Maintaining a data center with VMware access using provided sudo privileges
Writing simple shell scripts for internal environment requirements

6. Medgenome Labs Ltd, Bangalore. Sr.Linux Administrator (Sep 2017 – Apr 2019)

Deployment and maintenance of various ﬂavors of Linux VMs (Redhat, Ubuntu) systems.
Tools monitoring, Problem management.
Vulnerability management. Automation via shell scripting, Backup management.
RedHat Satellite Spacewalk server maintenance.

7. Wipro Technologies, Bangalore Lead Administrator(Jul 2014 – Sep 2017)

Deployment and maintenance of various Linux VM flavors (RedHat, Ubuntu/Debian, SUSE)
OS customization:
- Ubuntu/Debian via Remastersys
- RedHat via Kickstart (KS)
- SUSE via KIWI
Basic configuration and administration of DNS, Samba, and NFS
Apache server configuration and maintenance
Periodic vulnerability remediation through CRs
Hardening newly built VMs
Applying security patches from Satellite server
Upgrading lower versions via Satellite server
Monitoring and troubleshooting performance-related issues
User management and administration
Swap space management
Job scheduling and automation using CRON
Configuring and monitoring disk mirroring and striping using LVM
Managed a 7-member team including L1 and L2 engineers
Periodic customer communication via emails and meetings (CRM)
Delegated tasks to appropriate team members
Accountable for customer deliverables
Shared knowledge through SOPs and KT sessions
Handled problem management including RCA and outage resolution

8. Cisco Inc. via Ariveguru Technology Solutions Lab Admin / Sr. System Administrator(Mar 2013 – Jul 2014)

Configured virtual machines across various Linux and Windows flavors; provided support across all levels
Performed kernel and OS upgrades; automated tasks using cron jobs
Handled physical-to-virtual server migrations, VM cloning, and replacements
Managed backups using NetBackup for RHEL 5 & 6 and Bacula for Ubuntu 12.04 LTS
Troubleshot Linux and Windows servers to improve performance and stability
Supported and maintained VMware ESXi in the testing lab; provided vSphere access to users
Configured terminal servers and various Cisco routers
Set up multiple types of PDUs with access switches; managed PDUs via PowerIQ software
Maintained inventory using the Eitms tool

9. Jetking Infotrain Limited, Sadashiva Nagar, Bangalore - Linux Trainer & System Administrator(Jan 2011 – Mar 2013)

Handled Red Hat Enterprise Linux 6, Windows 7, and Network Essentials (N+) batches for Jetking students
Installed and maintained DNS, DHCP, WINS, RIS, IIS, LAN routing, and NAT servers
Installed and maintained Samba Server, NFS Server, Kickstart, IP forwarding, and VNC Server
Set up RHEL5 on USB stick, PXE installation server, Sendmail server, and virtualization environments
Provided operational and technical support to computer users; interacted with external technology suppliers
Installed and configured computers and peripherals on data networks
Guided and assisted students in resolving technical problems and responding to queries
Served as the first point of contact for all computer hardware and software issues
Analyzed technical and operational problems and delivered workable solutions

10. IBM India Private Limited, Bangalore IT Security Analyst(Mar 2009 – Mar 2010)

Provided Level 2 support for Identity Access Management at IBM
Performed daily server health checks to ensure operational stability
Tools used:
- WRT: Work Request Tool (ticketing system)
- URT: User ID Revalidation Tool
- MS Excel 2007 for file manipulation and reporting
Managed periodic compliance activities under Q2 Flexi Pool: Rhythm
Executed specified scripts on servers; stored formatted output in temp directories
Processed formatted files in Excel according to User ID Revalidation format until zero syntax errors were achieved
Performed regular server vulnerability checks to maintain security compliance

11. Network Labs, Jayanagar, Bangalore Linux System Administrator(Oct 2008 – Feb 2009)

Installed and maintained DNS, Samba, DHCP, and PXE servers
Handled Red Hat Enterprise Linux 5, Windows 7, Windows Server 2003, and Network Essentials (N+) batches for students
Tools used: Putty, Remote Desktop Environment

12. Candor Solutions, Rajajinagar, Bangalore Linux System Administrator(Sep 2007 – Sep 2008)

Installed and maintained DNS, Samba, HTTP, SquirrelMail, DHCP, and PXE servers on RHEL 5.0
Tools used: Putty, Remote Desktop Environment

13. Kodaikanal Christian College, Kodaikanal, Lecturer (July 2005 – Jul 2007)

Worked as a Lecturer. Handling classes for Linux Operating System, Compiler Designer, Microprocessor and Databases as well as Java Language.

14. RVS College of Engg & Tech, Dindigul. | Network Lab in-charge (June 2003 – May 2005)

Cable crimping, Installing & Maintain the OS, Setting security policies.
Tools used: Putty, Remote Desktop Environment

15. Axis Systems, Kodambakkam, Chennai. | Network Lab in-charge (June 2001 – May 2003)

Cable crimping, Installing & Maintain the OS, Setting security policies.
Tools used: Putty, Remote Desktop Environment

🎓 Education

M.Sc Computer Science – St. Joseph’s College, Bharathidasan University, Trichy, TN. (2001 – 70.02%)
PGDCSA – St. Joseph’s College, Bharathidasan University, Trichy, TN. (1999 – 76.67%)
B.Sc Statistics – St. Joseph’s College, Bharathidasan University, Trichy, TN. (1998 – 74.06%)
HSC First Group – St. Mary’s HSS, Dindigul, TN. (1995 – 72.83%)
SSLC State Board – St. Mary’s HSS, Dindigul, TN. (1993 – 83.2%)

🎵 Extra-Curricular

Nature Club participant
Writes Tamil poems, sings, listens to music, Photography

Personal Details

DOB: 1^stJun 1978
Linguistic: English, Tamil & Kannada