Arunachalam Ilangovan

Provide L1/L2 server and application support in hybrid enterprise environments. Perform installation, configuration, and troubleshooting of Windows Server (2012-2022). Manage Active Directory users, groups, and Organizational Units (OUS), including password resets, account unlocks, and access control. Support DNS and DHCP, including IP reservations, scope management, and network connectivity troubleshooting. Diagnose server and network issues using ping, tracert, ipconfig, nslookup, and event logs. Monitor server health, services, and system performance; respond to alerts and incidents within SLA. Manage endpoint and server-related configurations using Microsoft Intune. Configure and support Zscaler ZIA and ZPA to enable secure, zero-trust access to internal applications. Collaborate with application, network, and security teams during incident resolution and escalations

Installed and configured Windows OS on 100+ endpoints, optimizing system performance and reducing downtime by 20%.handling a wide range of IT infrastructure and software issues. Led the troubleshooting of complex VDI, BitLocker, and Active Directory issues, achieving a 98% issue resolution rate within SLAs. Implemented and managed Group Policies to enforce security configurations, system updates, and access restrictions across different Organizational Units (OUS), reducing security incidents by 25%. Managed over 500+ Active Directory user accounts, including creation, modification, and removal of users across multiple domains, ensuring seamless access control and compliance with organizational policies. Implemented multi-factor authentication for remote access, enhancing security for over 500+ users. Documented system configurations and procedures for knowledge sharing within the team. Provided on-call support for critical issues and worked on root cause analysis for incident resolution