Technical Expert - Linux

Job Summary We are looking for an experienced OS/System Administrator to manage and support Linux (RHEL) and Windows server environments. The ideal candidate should have hands-on experience in server administration, virtualization, OS patching, performance tuning, security hardening, automation, and troubleshooting in enterprise data center environments. Key Responsibilities Administer and maintain Linux (RHEL) and Windows Server environments. Manage physical servers and virtual machines (VMware/Hyper-V/OpenStack or similar). Install, configure, upgrade, patch, and maintain operating systems. Perform daily health checks for CPU, memory, storage, filesystem, and server performance. Monitor system logs, audit logs, backup logs, and troubleshoot OS-related issues. Perform server performance monitoring, tuning, and capacity planning. Configure and manage user accounts, groups, permissions, and security policies. Implement OS security hardening, access controls, firewall configurations, and security best practices. Manage Logical Volume Management (LVM), mount points, storage, shared storage, and SFTP. Perform OS patch management and vulnerability remediation. Handle backup and restore activities. Support DR drills and Disaster Recovery activities. Coordinate with OEMs, virtualization teams, storage teams, network teams, and application teams for issue resolution. Configure and troubleshoot DNS, NTP, NFS, Proxy, and related infrastructure services. Integrate servers with SIEM, SCD, ITAM, DAM, monitoring, and logging tools. Perform audit compliance activities including VAPT, IS Audit, CSR, and security compliance. Develop Shell Scripts/Bash scripts for automation. Install and configure enterprise software and server applications. Monitor server availability and maintain high uptime. Maintain technical documentation, SOPs, and operational procedures. Manage cluster services including resource configuration, log monitoring, cluster startup/shutdown, and maintenance. Required Skills Linux Administration (RHEL 7/8/9) Windows Server Administration (2016/2019/2022) VMware / Virtualization Server Installation & Configuration OS Patch Management Performance Monitoring & Tuning Shell Scripting / Bash User & Group Administration LVM & File System Management DNS, NTP, NFS, Proxy Backup & Restore Server Security Hardening Firewall Configuration SIEM Integration VAPT Remediation Audit Compliance Disaster Recovery (DR) Cluster Administration Server Monitoring Tools Troubleshooting Documentation Shift Willingness to work in 24x7 rotational shifts and provide production support.