Kalesh R

Senior System Administrator and Webhosting Administrator with 10 years of experience across Windows Server administration, web hosting administration, network administration, and hosting infrastructure management in enterprise, hosting, and client-facing environments. Skilled in Active Directory, DNS management (Cloudflare), firewall administration, and control-panel ecosystems (cPanel/WHM, Plesk, IIS), with additional expertise in building-wide low-voltage and communication systems (EPABX/IP PBX, PA, CCTV, biometric access, structured cabling). Independently builds and deploys client-facing websites, manages DNS and traffic routing, and maintains a strong record of maximizing uptime, hardening security posture, and resolving complex incidents under pressure.

Certified in Ethical Hacking and Google IT Support.

Senior System Administrator - Joyra Systems Pvt Ltd - Nagercoil, Tamil Nadu

(2019-05 - 2025-09)

• Administered enterprise hosting infrastructure end-to-end as System Administrator, including billing, NAS, and web servers, maintaining consistent uptime across client environments.
• Configured and hardened RAID arrays and CCTV surveillance systems to safeguard physical and data infrastructure.
• Delivered full-stack hosting and server administration support across Plesk, cPanel, and IIS, managing provisioning, migrations, and troubleshooting for multiple client accounts.
• Diagnosed and resolved complex hardware, software, and network issues as part of IT support and technical support operations, minimizing downtime and escalation volume.
• Designed and maintained LAN/WAN network topology and firewall policy (Sophos, Netfox) to secure perimeter and internal traffic.
• Owned Google Workspace and Microsoft 365 administration and DNS/SSL/email server configuration, ensuring secure and reliable business communications.
• Deployed and managed building-wide communication and surveillance systems, including EPABX/IP PBX, PA systems, biometric attendance, IPTV, and structured cabling.

System Administrator - Vinnbpo India Pvt Ltd - Coimbatore, Tamil Nadu

(2015-01 - 2018-12)

• Deployed and maintained core infrastructure systems as Linux System Administrator, including a production Vici Dial server on Ubuntu.
• Monitored network performance and administered user access controls across the organization.
• Established routine backup and disaster-recovery procedures to protect business-critical data.
• Provided frontline hardware/software troubleshooting and end-user technical support / helpdesk support.

Bachelor of Science - Computer Science - Rathinam College of Arts and Science (2013-06 - 2015-04)