Install, configure, maintain, and support Linux operating systems (e.g., RHEL, CentOS, Rocky, Ubuntu)
Monitor system performance, availability, and security; proactively resolve issues
Apply system patches, updates, and security hardening in accordance with STIGs and organizational policies
Manage user accounts, permissions, and access controls
Support system backups, recovery procedures, and continuity planning
Troubleshoot hardware, software, and network-related issues
Maintain system documentation, configuration baselines, and standard operating procedures
Collaborate with cybersecurity, network, and application teams to ensure system reliability and compliance
Participate in on-call or after-hours support as required

Requirements

U.S. Citizenship Required
Active Secret Clearance Required (must be current and maintainable)
3+ years of experience as a Linux System Administrator or similar role
Strong knowledge of Linux system internals, file systems, and command-line tools
Experience with system monitoring, logging, and performance tuning
Familiarity with DoD security requirements, STIGs, and RMF processes
Scripting experience (Bash, Python, or similar)
Ability to work in a classified, regulated environment
Must be able to work a hybrid schedule onsite in Norco, CA

Benefits

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Linux operating systemsRHELCentOSRockyUbuntusystem monitoringscriptingBashPythonperformance tuning

Soft Skills

collaborationtroubleshootingproblem-solvingcommunicationadaptability

Certifications

Active Secret Clearance