Senior Linux System Administrator - Remote (Secret)

ASRC Federal Holding Company; United States; Remote; USD 80,000 - 160,000; Full time

Job summary

Agile Decision Sciences LLC seeks a Senior Linux System Administrator to lead day-to-day administration, hardening, and modernization of enterprise Linux environments in support of DoD missions. Remote role, US-based, with Secret clearance requirement and EST business hours.

The position emphasizes patch management, automation (Ansible/Terraform), and collaboration across security and network teams to sustain mission-critical systems.

Qualifications

• Bachelor's degree in computer science, computer engineering, information systems, or related technical discipline; four additional years of equivalent experience considered in lieu of degree.
• Active Secret clearance or higher; TS/SCI strongly preferred.
• Minimum 5 years of hands-on Linux system administration, with at least 3 years in senior/lead capacity.
• Experience in mission-critical Linux environments in DoD or federal settings.
• Experience administering and troubleshooting RHEL in on-prem and cloud.
• Ability to communicate technical concepts clearly to technical and non-technical stakeholders.
• DoD 8570/8140 baseline certification (Security+ CE or higher) required at hire or within 6 months.

Responsibilities

• Administer, maintain, and harden enterprise RHEL environments on-prem and in AWS GovCloud.
• Operate high-availability clusters, load-balanced services, and CECOM ASIC software delivery workflows.
• Lead patching, hardening, and STIG/ACAS compliance; coordinate vulnerability remediation.
• Develop and maintain Infrastructure as Code using Ansible, Terraform; create automation scripts (Bash, Python).
• Collaborate with security, network, and app teams to support ATO and continuous authorization.
• Mentor junior admins and contribute to architecture and lifecycle decisions.
• Support CI/CD pipelines and software delivery processes for Army units.

Skills

RHEL administration

AWS GovCloud

Automation

Scripting

CI/CD tools

Vulnerability remediation

DoD compliance

Security clearance

Education

Bachelor's Degree in CS/Engineering

Experience in lieu of degree

Tools

RHEL

AWS GovCloud

Ansible

Terraform

Bash

Python

GitLab CI

Jenkins

Job description

Agile Decision Sciences LLC seeks a Senior Linux System Administrator to lead day-to-day administration, hardening, and modernization of enterprise Linux environments in support of DoD missions. Remote role, US-based, with Secret clearance requirement and EST business hours.

The position emphasizes patch management, automation (Ansible/Terraform), and collaboration across security and network teams to sustain mission-critical systems.