Dheeraj Sri

Senior Manager IT

Microsoft • Freelance

May 2015 - Present • 11 yrs 2 mos

I am a highly experienced IT Infrastructure Manager and Senior L3 Linux System Administrator with over 10 years of hands-on experience in enterprise IT infrastructure, Linux and Windows server administration, virtualization, cloud computing, networking, cybersecurity, automation, and technical support. I specialize in designing, deploying, managing, troubleshooting, and optimizing secure and reliable IT environments for businesses of all sizes. My expertise covers on-premises infrastructure, cloud platforms, virtualization, networking, security solutions, backup strategies, disaster recovery, and infrastructure automation. What I Can Do for You Linux Server Administration - SUSE Linux Enterprise Server (SLES) - Red Hat Enterprise Linux (RHEL) - Ubuntu Server - CentOS - AlmaLinux - Linux installation, configuration and troubleshooting - Performance tuning - Patch management - Security hardening - Shell scripting Windows Server Administration - Windows Server 2016/2019/2022/2024 - Active Directory - Group Policy (GPO) - DNS - DHCP - User management - File Server - Remote Desktop Services Virtualization - VMware ESXi - VMware vSphere - Proxmox VE - Virtual Machine deployment - Server migration - High Availability clusters - Infrastructure optimization Cloud Services - Microsoft Azure - Virtual Machine deployment - Cloud networking - Storage management - Cloud infrastructure support Network Administration - TCP/IP - DNS - DHCP - VPN - BGP - OSPF - MPLS - Cisco Switch configuration - Network troubleshooting - Wireless network deployment Firewall & Security - FortiGate Firewall configuration - VPN setup - Endpoint security - Security hardening - Security monitoring - Zscaler - SentinelOne Monitoring & Backup - Nagios Monitoring - WSUS Server - Backup configuration - Disaster Recovery - Infrastructure monitoring - System health monitoring - Alert configuration Python & Automation - Python scripting - Bash scripting - Linux automation