Senior Linux System Admin – DoD TS, ATO, Automation

ASEC; Maryland; On-site; USD 135,000 - 155,000; Full time

Benefits offered by this job

ESOP

Comprehensive benefits

401(k) matching

Tuition assistance

Veteran-friendly

Thriving culture

Job summary

ASEC is seeking a Senior Linux System Administrator at NAS Patuxent River, MD, to ensure secure configurations, maintain hardened baselines, and deliver accreditation artifacts supporting ATO compliance. The role emphasizes reliability, process discipline, and long-term system assurance in a DoD environment.

The successful candidate will apply DISA STIGs, manage ACAS/EvaluateSTIG assessments, patch VMware ESXi, automate tasks with Red Helm Ansible Platform, and maintain RMF/NIST alignment.

Qualifications

• 7 years of experience in DoD networks required (bachelor's in STEM may substitute).
• Deep knowledge of Red Helm Enterprise Linux (RHEL).
• Experience with Confluence and Jira required.
• Familiarity with SolarWinds monitoring/auditing tools preferred.
• Familiarity with Red Helm Ansible Automation Platform preferred.

Responsibilities

• Apply DISA STIGs to secure Linux configurations and prevent audit issues.
• Manage vulnerability assessments with ACAS and EvaluateSTIG to maintain ATO compliance.
• Maintain and secure VMware ESXi hypervisors, including patching and hardening.
• Automate routine admin tasks using Red Helm Ansible Automation Platform.
• Apply monthly RHEL updates to keep environment secure and up-to-date.
• Refine processes to align with policy and collaborate with DevOps and security teams.
• Release quarterly RHEL hardened templates with documentation and ATO submissions.
• Monitor Linux and ESXi for performance, availability, and security issues.

Skills

DoD networks experience

RHEL expertise

Confluence & Jira

SolarWinds experience

Ansible Platform

Education

Bachelor's degree in STEM

Tools

Confluence

Jira

SolarWinds

VMware ESXi

Red Helm Ansible Platform

Job description

ASEC is seeking a Senior Linux System Administrator at NAS Patuxent River, MD, to ensure secure configurations, maintain hardened baselines, and deliver accreditation artifacts supporting ATO compliance. The role emphasizes reliability, process discipline, and long-term system assurance in a DoD environment.

The successful candidate will apply DISA STIGs, manage ACAS/EvaluateSTIG assessments, patch VMware ESXi, automate tasks with Red Helm Ansible Platform, and maintain RMF/NIST alignment.