Principal Linux System Administrator
$149,000–$184,000 year
On-siteAurora, Colorado, United States
Job Summary
Lead the System Administrator group by providing mentorship, overseeing operational excellence, and managing the installation, configuration, and maintenance of Red Hat Enterprise Linux workstations and servers. Implement security hardening, integrity monitoring, backups, and auditing in accordance with STIG and SCAP baselines. Perform patch and package management for third-party software, monitor system health, and troubleshoot hardware and software issues. Support virtualized environments including VMware, Podman, and Docker, while configuring networking across mixed Linux and Windows stacks. Document all system configurations, procedures, and changes strictly per policy. Collaborate with security personnel and end users to resolve operational issues and drive continuous improvement through automation and modernization efforts. Maintain an Active Top Secret clearance and work within a mission-focused defense environment supporting missile warning and intelligence programs.
Required Qualifications
- U.S. citizenship
- 8+ years of professional experience administering Linux systems
- Active Top Secret clearance
- Ability to obtain and maintain a Secret security clearance
- Installation and configuration of RHEL 8 servers and workstations
- System security, hardening (STIG), auditing, and backup strategies
- Patch and package management
- Virtualization technologies including VMware, Podman, Docker, Image registries, Red Hat Openshift/Kubernetes
- Hardware and software troubleshooting
- Networking in heterogeneous (Linux/Windows) environments
- Strong oral and written communication skills
- Detail oriented
- Proven ability to work collaboratively in a team environment
- Self-motivated, detail-oriented, and able to own issues through completion
Desired Qualifications
- RHEL preferred
- Bachelor's degree in Information Technology, Network Engineering, Computer Engineering, or a related technical field
- Dell servers, switches, and SAN solutions
- VMware vSphere
- Root Cause Analysis and documenting findings
- DISA SCAP Compliance Checker and DISA STIG implementation
- RHEL 8/9/10
- NAS and/or SAN configuration and maintenance
- Configuration management, Automation, Scripting (Ansible, Bash, Python)
- Git/GitLab and CI/CD pipelines
- Containers and orchestration (Podman/Docker, RHOCP/Kubernetes, minikube, image registries)
- Security+
- RHCSA / RHCE / LPIC-1
- Relevant certifications
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