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# Linux Systems Administrator

- **Company:** ASRC Federal Holding Company
- **Location:** Aberdeen Proving Ground, MD, United States
- **Experience:** Expert
- **Contract:** Contract
- **Skills:** Active Directory, Apache HTTP Server, Bash Shell, Oracle WebLogic Server, Software as a Service, Information Systems, Databases, Linux, Multi-Factor Authentication, Middleware, Identity and Access Management, Lightweight Directory Access Protocols (LDAP), PostgreSQL, Linux System Administration, Logical Volume Manager, MongoDB, Oracle Databases, Performance Tuning, Public Key Infrastructure, Red Hat Enterprise Linux, Ansible, Samba (Software), Systems Integration, Software Vulnerability Management, SC Clearance, Selinux, Information Technology, Nessus, Data Management, Network Server, Block Storage
- **Published:** October 30, 2026
- **Apply:** https://www.careerbuilder.com/job-details/linux-systems-administrator-aberdeen-proving-ground-md--f5b24c46-01fc-4707-99ad-8d4c4819a87e

## About the Role

Linux Administration, Linux Administration, Defense Information Systems Agency (DISA), Automation, Red Hat Linux Operating System, Systems Administration/Management, Application Hosting, Identity Data Management, Analysis Skills, United States Army, Bachelor's degree (BA/BS) in Computer Science, Information Technology, Engineering, or a related field or a related field or additional years of relevant work experience.4+ years of experience3 years of RedHat experience, RedHat certificationLinux+ certificationDoD and RHEL system integration experienceDoD vulnerability remediation experienceActive Secret clearance, Minimum of an active or interim DoW SECRET clearance, or the ability to obtain and maintain a DoW SECRET clearance within the necessary timeframe required by applicable contract., Bachelor's degree in information technology, Computer Science, or a related field or additional years of relevant work experience.4+ years of experience8+ years of related work experience in lieu of a degree, DoDI 8140.03 qualification for DCWF Work Role 451 Systems Administrator- Intermediate. Accepted foundational qualifications include certifications mapped to Work Role 451 Systems Administrator- Intermediate in the current DoD 8140 Qualification Matrix, such as Cloud+, Security+, and SSCP.

## Description

ASRC Federal is looking for a Linux System Administrator to support their work with DEVCOM-CBC and the Transformation Decision Analysis Center (TDAC) organization. The Senior Linux Systems Administrator serves as a technical subject matter expert responsible for the engineering, deployment, configuration, security compliance, and lifecycle maintenance of enterprise Red Hat Enterprise Linux (RHEL 7, 8, and 9) infrastructure supporting U.S. Army operations. The candidate will manage system automation, identity management, storage configuration, application hosting integration, and vulnerability remediation in accordance with DoD and DISA standards.KEY RESPONSIBILITIES

Architect, deploy, configure, maintain, and decommission enterprise RHEL 7, 8, and 9 servers. Manage kernel updates, system upgrades, and package lifecycles via yum/dnf repositories integrated with Red Hat Satellite and centralized automation pipelinesDevelop, test and execute Ansible playbooks to automate day-to-day administrative tasks, configuration drifts, and routine maintenance. Write and maintain Bash scripts for system automationManage systemd service orchestration, enforce strict SELinux policies in enforcing mode, and manage container runtime environments using DockerConfigure and administer local block storage utilizing Logical Volume Manager (LVM). Deploy, secure, and maintain enterprise network share services including Samba and NFSProvide infrastructure level hosting support, system tuning, and OS prerequisites for enterprise middleware and database tiers, including Oracle Database, Oracle WebLogic, Apache HTTP Server, PostgreSQL, and MongoDB instancesApply and validate DISA
Security Technical Implementation Guides (STIGs) across all Linux nodes. Perform vulnerability remediation using automated and manual methods based on ACAS/Nessus scan results to maintain continuous IAMV and STIG complianceIntegrate RHEL systems with enterprise identity providers (LDAP / Active Directory) enforcing CAC/PKI-based multi-factor authentication. Issue, deploy, and maintain DoD PKI SSL/TLS certificates for server identification, secure communications, and client authenticationMonitor system health, performance metrics, and logs using enterprise monitoring tools. Conduct root cause analysis on system degradation or outages, implementing performance optimizations and corrective actions