Lead Unix/Linux Administrator

Position Overview

Key Responsibilities

• Administer and support enterprise Linux and Unix environments across production and non-production infrastructure.
• Perform installation, configuration, hardening, patching, upgrades, troubleshooting, and lifecycle management of Linux/Unix servers.
• Provide advanced administration for Oracle Linux, Red Hat Enterprise Linux (RHEL), CentOS and Solaris environments.
• Troubleshoot complex OS, kernel, filesystem, networking, performance, boot, package, and service-related issues.
• Manage server provisioning, decommissioning, migration, and infrastructure consolidation activities.
• Perform OS upgrades, kernel upgrades, security remediation, vulnerability remediation, and configuration management.
• Manage LVM, XFS, ext4, ZFS, NFS, iSCSI, SAN, multipath, and enterprise storage environments.
• Troubleshoot storage connectivity, multipathing, filesystem, NFS, and SAN-related issues.
• Manage and troubleshoot DNS, NTP/Chrony, SSH, FTP/SFTP, NFS, TCP/IP, VLAN, routing, firewall, and other core infrastructure services .
• Administer and troubleshoot virtualization environments such as Oracle Linux Virtualization Manager (OLVM), oVirt, VMware, or equivalent platforms .
• Support VM creation, migration, resource allocation, host maintenance, and virtualization infrastructure operations.
• Develop and maintain automation using Ansible and shell scripting .
• Automate repetitive administration, patching, health checks, configuration validation, and operational activities.
• Work with monitoring, logging, backup, vulnerability management, and enterprise infrastructure tools.
• Analyze system performance and capacity, including CPU, memory, disk, I/O, filesystem, and network utilization.
• Prepare detailed technical documentation, operational procedures, and knowledge-base articles .
• Participate in infrastructure migrations, data-center migrations, technology refreshes, and large-scale server consolidation projects.
• Coordinate with application, database, storage, network, security, virtualization, and vendor teams to resolve complex infrastructure issues.
• Implement security best practices and ensure servers comply with enterprise security and vulnerability standards.
• Perform change implementation in accordance with ITIL/change-management processes.
• Participate in on-call and after-hours support for critical production infrastructure when required.