Description The System Administrator provides Tier-3 operational and maintenance support for enterprise IT and data center monitoring systems. This role ensures system availability, security compliance, and continuous monitoring across regional and global infrastructures. Key Responsibilities • Administer and maintain enterprise monitoring and logging platforms including: • Nagios (multi-region) • NetFlow/sFlow collectors • HP Network Node Manager (HPNMi) • HP Network Automation (HPNA) • Syslog and Cribl • Maintain regional and global instances to ensure continuous availability and mission support. • Perform system scaling, configuration changes, and performance tuning as operational requirements evolve. • Execute patching and upgrades of applications and systems for: • Security compliance • Bug remediation • Provide advanced troubleshooting and root cause analysis for mission-impacting incidents. • Assist with alert tuning, false positive reduction, and onboarding of new monitoring alerts. • Support enterprise environmental logging and monitoring infrastructures to meet uptime SLAs. • Track incidents, service requests, and changes • Support log retention, storage, and restoration processes. • Assist users with software installation, usage, and operational best practices. Requirements Top Secret SCI w/ Polygraph Clearance Required Required Skills • Linux system administration • Enterprise monitoring tools (Nagios, NetFlow, Syslog) • Network troubleshooting fundamentals • Patch and configuration management • Incident response and operational support in secure environments