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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Linux Systems Administrator - **Company:** TRINZIC CORP - **Location:** Huntsville, AL, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Active Directory, Application Layers, User Authentication, Bash Shell, Configuration Management, Software Documentation, Cyber Security, Linux, Desktop Environments, Monitoring of Systems, Identity and Access Management, Python (Programming Language), Kerberos (Protocol), Lightweight Directory Access Protocols (LDAP), Linux System Administration, Local Security Policy, Logical Volume Manager, Package Management Systems, Public Key Infrastructure, Red Hat Enterprise Linux, Ansible, Smart Cards, Software Configuration Management, Software Deployment, Software Engineering, Systems Integration, Virtualization Technology, Software Vulnerability Management, Scripting, Selinux, Information Technology, Modeling and Simulation, Patch Management, Nessus, 3-tier Architectures, Splunk, Scap Compliance Checker, Ansible Tower - **Published:** October 26, 2026 - **Apply:** https://www.techcareers.com/job.asp?id=3472066452&tx=YT606CYT&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54 ## About the Role * U.S. Citizenship required. * Active Secret clearance required. * Bachelor's degree in Information Technology, Computer Science, Engineering, Cybersecurity, or related STEM field with 8+ years of relevant experience. Equivalent experience may be considered. * Experience administering RHEL servers and workstations in an enterprise environment. * Experience implementing and maintaining DISA STIG hardening and SELinux on RHEL systems. * Experience with configuration management and automation using Ansible, Bash, or Python. * Experience with Linux patch management, package management (DNF/YUM, RPM), and repository management. * Experience integrating Linux systems with enterprise identity, authentication, and directory services. * Experience troubleshooting complex issues spanning the OS, storage, networking, authentication, and application layers. * Experience developing and maintaining technical documentation and standard operating procedures., * Red Hat Certified System Administrator (RHCSA), Red Hat Certified Engineer (RHCE), Red Hat Certified Architect (RHCA), or other relevant industry certifications. * DoD 8140 / 8570 IAT Level II certification (e.g., Security+ CE) * Experience supporting classified Department of Defense environments, including air-gapped and disconnected networks. * Experience implementing RMF-compliant systems and controls, including NIST 800-53, SCAP Compliance Checker, ACAS/Nessus, and vulnerability management practices. * Experience administering Red Hat Satellite, including content views, lifecycle environments, and disconnected content synchronization. * Experience with Red Hat Identity Management (IdM), SSSD, Kerberos, and CAC/PKI smart card authentication on Linux. * Experience with Ansible Automation Platform or Ansible Tower/AWX. * Experience with RHEL workstation support for engineering, modeling and simulation, or software development users, including GPU drivers and specialized application deployment. * Experience with containers and virtualization technologies on RHEL. * Experience with Splunk, rsyslog, ELK, or comparable log aggregation and monitoring platforms. ## Description As a Senior Linux Systems Administrator, you will serve as the technical lead and subject matter expert for Red Hat Enterprise Linux (RHEL) servers and workstations supporting classified and unclassified mission environments. This role focuses on the build, configuration, hardening, administration, and sustainment of RHEL systems across the full lifecycle, from provisioning and baseline development through patching, compliance, and decommissioning. The successful candidate will be responsible for maintaining secure, stable, and standardized Linux environments while leading automation efforts, supporting cybersecurity compliance requirements, and mentoring junior administrators. Working closely with cybersecurity personnel, infrastructure engineers, program leadership, and end users, you will help ensure reliable, scalable, and secure operation of Linux systems supporting mission execution. Key Responsibilities * Design, deploy, administer, and troubleshoot RHEL servers and engineering workstations in physical, virtual, and air-gapped environments. * Develop and maintain standardized RHEL server and workstation baselines, configurations, and golden images. * Administer provisioning, content, subscription, and patch management tooling, including in disconnected environments. * Implement and maintain DISA STIG configurations and security controls, perform compliance scanning, and remediate vulnerabilities across Linux systems. * Administer workstation desktop environments including GNOME configuration and lockdown, session security settings, and peripheral and display support. * Integrate RHEL systems with identity and authentication services including Red Hat IdM, Active Directory via SSSD, Kerberos, LDAP, and CAC/PKI smart card authentication. * Develop and maintain Ansible playbooks, roles, and shell or Python scripts to automate configuration management, compliance enforcement, and routine administration. * Manage storage and file services on Linux systems including LVM, XFS, NFS, and multipath configurations. * Monitor system performance, capacity, availability, and log data, and perform root cause analysis on complex system issues. * Plan and execute OS upgrades, migrations, and modernization initiatives supporting resiliency and automation. * Coordinate with Information Assurance and Cybersecurity personnel to maintain compliance with RMF, NIST 800-53, DISA STIG, and organizational security requirements, and support system accreditation activities. * Develop and maintain system documentation, hardware and software inventories, and standard operating procedures. * Serve as Tier 2 and Tier 3 escalation point for Linux issues and mentor junior administrators on RHEL administration, security hardening, and automation practices. * Serve as a technical advisor to program leadership regarding Linux architecture, lifecycle planning, technology refresh, and risk reduction efforts.