System Administrator

• Install, configure, administer, maintain, and decommission physical and virtual Windows and Linux servers
• Perform operating-system installation, configuration, patching, hardening, upgrades, and lifecycle maintenance
• Administer virtualized environments, including creating, configuring, monitoring, migrating, and retiring virtual machines and associated resources
• Diagnose and resolve system, operating-system, application, virtualization, storage, network-connectivity, and performance issues
• Coordinate with hardware, network, cybersecurity, database, storage, and application-support personnel
• Configure and maintain authentication, directory, domain, DNS, DHCP, file, print, and logging services
• Monitor server health, performance, capacity, availability, event logs, and security alerts
• Implement security configurations, vulnerability remediation, security patches, endpoint-security tools, and compliance settings
• Support cybersecurity vulnerability and misconfiguration assessment and remediation
• Maintain privileged-access controls, account administration, group memberships, and role-based access
• Support enterprise applications and middleware installation, configuration, and sustainment
• Perform software installation, licensing support, version upgrades, and configuration changes
• Develop and maintain SOPs, system-administration guides, configuration baselines, and troubleshooting documentation
• Document system configurations, dependencies, maintenance actions, incidents, changes, and recovery procedures
• Support EOL/EOS planning, technology refresh, migration planning, and replacement-technology market research
• Participate in change-management, maintenance-window, outage-notification, and service-restoration processes
• Support Portable Operating Data Center (POD) systems, including installation, configuration, monitoring, maintenance, and upgrades
• Perform other related duties as assigned