Senior Linux System Administrator

ASRC Federal

. Administer, maintain, and harden enterprise RHEL environments across on-premises and AWS GovCloud infrastructure .

Posted 9/24/2026full-timeRemote • United StatesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in administering and hardening RHEL environments, with strong capabilities in automation using Bash and Python, and experience in compliance with DoD standards. Proficient in Infrastructure as Code practices and collaboration with cross-functional teams to support mission-critical operations.

Highest-signal resume keywords

RHEL AdministrationInfrastructure as CodeBash ScriptingAnsible Configuration ManagementDoD Compliance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Linux System AdministrationRHEL 8RHEL 9AWS GovCloudSTIG ApplicationACAS ScanningVulnerability RemediationCI/CD ToolingTCP/IP NetworkingSSH Key Management

Soft Skills

MentoringCollaborationTroubleshooting

Tools & Technologies

TerraformRed Hat PacemakerCorosyncGit

Certifications & Qualifications

Secret Security ClearanceSecurity+ CERHCSARHCECompTIA Linux+

Industry Keywords

DoDFederal SettingContinuous AuthorizationCATO ActivitiesMission-Critical Environments

Tech Stack

Tools & technologies

AnsibleAWSCloudDNSEC2LinuxPythonTCP/IPTerraformTypeScript

About the role

Key responsibilities & impact

Administer, maintain, and harden enterprise RHEL environments across on-premises and AWS GovCloud infrastructure
Operate and troubleshoot high-availability architectures, including Red Hat Pacemaker/Corosync clusters and load-balanced services
Lead patch management, system hardening, STIG/ACAS compliance, and vulnerability remediation across production fleets
Support ASIC software delivery workflows, including web-based deployment of software updates to deployed Army units
Develop and maintain Infrastructure as Code and configuration management using Ansible, Terraform, or equivalent
Author and maintain Bash and Python automation scripts for operational tasks, monitoring, and reporting
Collaborate with security, network, and application teams on ATO and Continuous Authorization activities
Mentor junior administrators, lead troubleshooting bridges, and contribute to architecture and lifecycle decisions
Support Linux Engineering Sustainment for the U.S. Army CECOM mission and ASIC

Requirements

What you’ll need

Minimum Secret security clearance required; ability to obtain and maintain TS/SCI strongly preferred
Bachelor’s Degree in Computer Science, Computer Engineering, Information Systems, or related technical discipline preferred; four additional years of equivalent experience in lieu of degree considered
Minimum 5 years of hands-on Linux system administration experience, including at least 3 years in a senior-level or technical lead capacity
Experience supporting mission-critical Linux environments in a DoD or federal setting
Experience administering and troubleshooting RHEL in on-premise data centers and cloud environments
Active Secret security clearance required or higher
DoD 8570/8140 compliant baseline certification, Security+ CE or higher, required at hire or within 6 months
Expert Red Hat Enterprise Linux administration; RHEL 8 required and RHEL 9 strongly preferred
Experience with RHEL workloads in AWS GovCloud, including EC2, S3, IAM, VPC, and EBS
Strong Bash and Python scripting and automation skills; PowerShell a plus
Hands-on Ansible or equivalent configuration management experience
Working knowledge of CI/CD tooling and Git-based source control workflows
Experience with system hardening, STIG application, ACAS scanning, and vulnerability remediation in DoD environments
Understanding of TCP/IP networking, DNS, LDAP/Active Directory integration, PKI, and SSH key management
Linux-focused certification such as RHCSA, RHCE, or CompTIA Linux+ preferred
Understanding of software assurance, applicable STIGs, DoD RMF processes, and Continuous Authorization/cATO activities
Must be U.S. based and able to work Monday-Friday, 8 am to 5 pm EST

Benefits

Comp & perks

Comprehensive medical, dental, vision, life insurance, and short-term/long-term disability plans
Bereavement, military obligation, and parental leave
11 paid holidays annually
401(k) plan with generous company match and immediate vesting
Employee referral bonuses
Professional development funding after 90 days for regular full-time employees
Funding for Associate’s, Bachelor’s, or Graduate Degrees
Funding for industry-standard professional certifications
Funding for professional certificate programs
Professional conference registration fees
Centers of Excellence and Communities of Practice for professional development, knowledge sharing, and collaboration