Senior Linux SysAdmin – DoD TS, Automation & Security

ASEC, Inc; Naval Air Station Patuxent River (MD); On-site; USD 135,000 - 155,000; Full time

Benefits offered by this job

ESOP

11 paid holidays

Medical/dental/vision coverage

HSA/FSA options

401(k) with company match

Tuition assistance

Veteran-friendly employer

Job summary

ASEC, Inc. is seeking a Senior Linux System Administrator to ensure secure configurations, generate accreditation artifacts, and maintain hardened baselines.

You will emphasize reliability and long-term system assurance across DoD-classified networks at NAS Patuxent River, MD. The role requires DoD Top Secret clearance, with OCONUS-like collaboration internally, and a focus on automated, repeatable processes using Ansible, RMF/NIST, and industry-standard tooling.

Qualifications

• 7 years of DoD classified networks experience required or equivalent.
• Deep knowledge of Red Hat Enterprise Linux (RHEL) required.
• Experience with Confluence and Jira required.
• Active DoD Top Secret clearance preferred or required.

Responsibilities

• Apply DISA STIGs to secure Linux configurations and avoid audits.
• Run ACAS and EvaluateSTIG for accreditation artifacts and ATO readiness.
• Maintain and harden VMware ESXi hosts and patch levels.
• Automate tasks using Red Helm Ansible Automation Platform.
• Apply monthly RHEL updates to keep the environment secure.
• Collaborate with DevOps and security teams to improve automation.
• Release quarterly RHEL hardened templates with documentation and ATO.
• Monitor Linux/ESXi for performance, availability, security.
• Support RMF/NIST 800-53/DoD SRG compliance efforts.
• Document in Confluence and track work in Jira.

Skills

RHEL expertise

Confluence & Jira

VMware ESXi

Ansible Automation

ACAS EvaluateSTIG

RMF NIST 800-53

Education

Bachelor's degree in STEM

MS in Engineering or related field (preferred)

Tools

SolarWinds

Ansible Automation Platform

Job description

ASEC, Inc. is seeking a Senior Linux System Administrator to ensure secure configurations, generate accreditation artifacts, and maintain hardened baselines.

You will emphasize reliability and long-term system assurance across DoD-classified networks at NAS Patuxent River, MD. The role requires DoD Top Secret clearance, with OCONUS-like collaboration internally, and a focus on automated, repeatable processes using Ansible, RMF/NIST, and industry-standard tooling.