1853 - Senior Linux Engineer - Onsite - Top Secret Clearance Required - Bonus Eligible

Rollout Systems; Bethesda (MD); On-site; USD 140,000 - 180,000; Full time

Job summary

Rollout Systems, LLC is seeking a highly motivated Senior Linux Engineer to join our onsite enterprise IT team supporting a critical warfighter customer. You will install, configure, and sustain Linux servers across physical, virtual, and cloud environments, manage identity services, and lead outage responses with a focus on security and compliance.

You will develop Ansible playbooks, Python/Bash/Perl scripts, and integrate automation with ServiceNow, Git/GitLab, and monitoring tools.

Qualifications

• 10+ years of hands-on Linux system administration experience.
• 5+ years in operations and maintenance with Linux security expertise.
• 5+ years scripting in Bash and Python; Perl experience preferred.
• 3+ years AAP experience with ansible-builder and Execution Environments.
• 1+ year help desk or direct IT customer support; ServiceNow familiarity.
• Experience with RHEL 8/9 and CentOS-like knowledge.

Responsibilities

• Install, configure, and sustain enterprise Linux servers and workstations across physical, virtual, and cloud environments.
• Manage accounts, groups, permissions, and services; SELinux, LVM, partitions, filesystems.
• Administer LDAP, NFS, DNS, SSH, and Active Directory integration.
• Provide Tier I–III incident support; ServiceNow workflows.
• Lead outage response, root cause analysis, and performance tuning.
• Develop Ansible playbooks and Python/Bash/Perl scripts for automation.
• Maintain GitLab CI/CD, Docker deployments, and RBAC configurations.
• Implement DISA STIGs and NIST RMF controls; perform hardening.

Skills

Linux system administration

Linux security

Python scripting

Bash scripting

Ansible automation

ServiceNow familiarity

Docker/container operations

Tools

Git/GitLab

Red Hat Satellite

Ansible Engine

Job description

Seeking a highly motivated and driven Senior Linux Engineer to work Onsite supporting enterprise IT for our War-fighter customer who upholds America's status as the "Land of the Free" every day, at work, or at play.

RESPONSIBILITIES

• Install, configure, administer, patch, and sustain enterprise Linux servers and workstations across physical, virtual, and cloud environments.
• Manage accounts, groups, permissions, access controls, system services, repositories, SELinux, LVM, partitions, and filesystems.
• Administer and troubleshoot LDAP, NFS, DNS, SSH, and enterprise identity services, including integration with Windows Active Directory.
• Provide Tier I–III operational support, including ServiceNow incident intake, triage, escalation, customer communication, and resolution.
• Diagnose kernel, boot, service, security, networking, and performance issues using system diagnostics and log analysis.
• Lead major outage response, root cause analysis, forensic investigation, and service restoration. Tune CPU, memory, and I/O performance and implement corrective actions to prevent recurrence.
• Administer SAN/NAS storage, RAID, multipathing, backups, and restores.
• Support application deployments, virtualization, high availability, clustering, and disaster recovery; validate recovery procedures.
• Deploy, upgrade, administer, and optimize AAP 2.x, including Automation Controller, Private Automation Hub, Execution Environments, inventories, projects, credentials, templates, workflows, and RBAC.
• Develop, test, troubleshoot, and maintain Ansible playbooks, roles, collections, and Python, Bash, and Perl scripts for provisioning, patching, configuration management, diagnostics, reporting, and routine operations.
• Build Execution Environments using ansible-builder and modernize legacy Tower/AWX workflows.
• Integrate automation with ServiceNow, Git/GitLab, Red Hat Satellite, Splunk, Dynatrace, vulnerability-management platforms, and monitoring tools.
• Maintain GitLab CI/CD, GitOps, configuration-as-code practices, and Docker container operations.
• Implement and automate DISA STIG configurations, ACAS remediation, Linux hardening, and compliance activities supporting RMF and NIST SP 800-53 controls.
• Maintain architecture diagrams, operational procedures, configuration records, and recovery instructions.
• Mentor Tier I and Tier II personnel in administration, troubleshooting, escalation, and customer support.

REQUIREMENTS

• 10+ years of hands-on Linux system administration experience.
• 5+ years of full-time operations and maintenance experience demonstrating expert knowledge of Linux security and network/distributed computing concepts.
• 5+ years of experience writing and maintaining Linux shell and Perl scripts, with expert scripting ability, strong Python and Bash skills, and experience diagnosing scripting errors.
• 3+ years of hands-on AAP experience, including platform administration, complex playbooks, roles, custom collections, reusable automation content, and Execution Environments built with ansible-builder.
• 1+ year of help desk or direct IT customer support experience, demonstrating communication, teamwork, and customer service skills; familiarity with ServiceNow incident workflows.
• Experience with Deep RHEL internals knowledge, including RHEL 8/9, and working knowledge of Cent