Hiring: Sr. Linux Systems Administrator Company: Astrion Location: Columbia, MD Job Posted Time: 2026-09-17 13:19:51 Employment Type: Full-time / On-site Target Skills & Keywords : Ansible, Azure, Bash, Configuration Management, Git, Kubernetes, Linux, Podman, Project Management, Python, RHEL, Red Hat, Risk Management, SIEM, Security Clearance, Systems Engineering, Zero Trust About the job Experience: •8+ years of Linux systems administration experience within DoD/DoW or classified environments Required Skills: •8+ years of Linux systems administration experience within DoD/DoW or classified environments •RHEL administration (installation, patching, performance tuning, kernel and systemd, storage, and networking) •Scripting and automation (Bash, Python, Ansible) •Linux identity and authentication (LDAP/SSSD, Kerberos, FreeIPA or AD integration) •Demonstrated experience implementing and maintaining DoD STIG compliance on Linux •Hands-on experience administering an HPC cluster (workload scheduler such as PBS Professional or similar) •RMF (Risk Management Framework) •DISA security requirements and accreditation processes Qualifications: •Active TS/SCI security clearance (required) •Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience) •Active DoD 8140 (formerly DoD 8570) compliant baseline certification (e.g., Security+ CE, CISSP) Compensation: •$145,000 - $165,000 / year Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!