Linux Systems Administrator

ASRC Federal; Aberdeen (MD); On-site; USD 90,000 - 120,000; Full time

Job summary

ASRC Federal is seeking a Senior Linux Systems Administrator to support DEVCOM-CBC and the Transformation Decision Analysis Center (TDAC) with enterprise RHEL infrastructure. You will engineer, deploy, secure, and maintain systems supporting U.S.

Army operations, leveraging automation pipelines and strict security controls. The role focuses on hands-on administration, Ansible playbooks, SELinux enforcement, and integration with LDAP/AD IAM.

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related field or additional years of relevant work experience.
• 4+ years of experience in Linux administration and support.
• 3 years of Red Hat experience.

Responsibilities

• Architect, deploy, configure, maintain, and decommission enterprise RHEL 7, 8, and 9 servers with kernel updates and lifecycle management.
• Develop, test, and execute Ansible playbooks to automate tasks and maintenance; write Bash scripts for automation.
• Manage systemd services, SELinux in enforcement mode, and Docker container runtimes.
• Configure and manage local storage using LVM; deploy Samba and NFS shares for enterprise use.
• Provide infrastructure hosting support for middleware and databases (Oracle, WebLogic, Apache, PostgreSQL, MongoDB).
• Apply DISA STIGs and perform vulnerability remediation using ACAS/Nessus results to maintain IAMV and STIG compliance.
• Integrate RHEL with LDAP/AD for CAC/PKI-based MFA and manage DoD PKI certificates.
• Monitor health and performance; perform root-cause analysis and implement optimizations.

Skills

Ansible automation

Bash scripting

RHEL administration

Security compliance

LDAP/AD IAM

Education

Bachelor’s degree in CS/IT

Tools

Red Hat Satellite

Docker

ACAS/Nessus

PKI / CAC

Job 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 pipelines
• Develop, test and execute Ansible playbooks to automate day-to-day administrative tasks, configuration drifts, and routine maintenance. Write and maintain Bash scripts for system automation
• Manage systemd service orchestration, enforce strict SELinux policies in enforcing mode, and manage container runtime environments using Docker
• Configure and administer local block storage utilizing Logical Volume Manager (LVM). Deploy, secure, and maintain enterprise network share services including Samba and NFS
• Provide 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 instances
• Apply 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 compliance
• Integrate 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 authentication
• Monitor 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

REQUIRED QUALIFICATIONS

• 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 experience
• 3 years of RedHat experience

PREFERRED QUALIFICATIONS

• RedHat certification
• Linux+ certification
• DoD and RHEL system integration experience
• DoD vulnerability remediation experience