Linux System Administrator

Vets Hired; Clarksburg (WV); On-site; USD 90,000 - 120,000; Full time

Job summary

Vets Hired is seeking a Linux System Administrator (Intermediate-Level) to operate, maintain, secure, and support enterprise Linux systems within a DoD-focused environment. The role emphasizes system availability, cybersecurity compliance, automation, backups, disaster recovery, virtualization, and modernization.

The candidate will harden systems per DoD STIGs, manage users, configure services, and collaborate across cybersecurity, networking, and engineering teams to ensure continuous mission

Qualifications

• Active DoD Secret Clearance required.
• IAT Level II certification or equivalent.
• 3+ years of Linux IT experience with RHEL or derivatives.
• Experience with Bash scripting and automation.
• Experience with security hardening (DoD STIGs) and vulnerability remediation.

Responsibilities

• Monitor system performance, availability, and security.
• Install, patch, and upgrade Linux systems and services.
• Harden systems per DoD STIGs and cybersecurity requirements.
• Develop automation using Bash and Ansible.
• Support VMware and Red Hat Virtualization environments.
• Participate in incident response and root-cause analysis.
• Maintain DoD/compliance documentation and diagrams.
• Collaborate with cybersecurity, networking, and engineering teams.

Skills

Linux administration

Bash scripting

Automation with Ansible

VMware

Red Hat Virtualization

Security hardening

DoD STIGs

DoD 8570/8140 IAT Level II

Clearance (DoD Secret)

Education

DoD 8570/8140 IAT Level II certification

Active DoD Secret Clearance

Tools

Ansible

VMware

RH Virtualization

Job description

Job Summary

The Linux System Administrator (Intermediate-Level) is responsible for operating, maintaining, troubleshooting, securing, and supporting enterprise Linux-based systems and infrastructure. The role focuses on system availability, performance, cybersecurity compliance, vulnerability remediation, automation, backups, disaster recovery, virtualization, and infrastructure modernization within a secure enterprise environment.

Key Responsibilities

• Monitor system performance, availability, and security.
• Identify and resolve system issues to maintain operational readiness.
• Install, configure, patch, and upgrade Linux operating systems, applications, and services.
• Harden Linux systems according to DoD STIGs and cybersecurity requirements.
• Manage user accounts, permissions, authentication, and access controls.
• Configure and maintain DNS, DHCP, NTP, LDAP, SSH, web services, and file-sharing services.
• Troubleshoot complex system, application, network, and performance issues.
• Analyze security scan results and perform vulnerability remediation.
• Develop automation solutions using Bash, Ansible, and configuration-management tools.
• Perform system backups, disaster recovery, and continuity-of-operations activities.
• Support virtualization and cloud infrastructure, including VMware and Red Hat Virtualization.
• Collaborate with cybersecurity, networking, and engineering teams.
• Maintain compliance with DoD, Army, and organizational security requirements.
• Support infrastructure modernization, technology testing, and system improvements.
• Participate in incident response, root-cause analysis, and after-action reporting.
• Provide technical guidance and mentorship to junior administrators and support personnel.

Required Qualifications

• U.S. Citizen with an active DoD Secret Clearance.
• DoD 8570/8140 IAT Level II certification, such as Security+ CE, SSCP, GSEC, or equivalent.
• Minimum 3 years of relevant IT experience with hands-on Red Hat Enterprise Linux (RHEL) or derivative distributions.
• Experience writing, maintaining, and troubleshooting Bash scripts.
• Experience installing, configuring, patching, and maintaining Linux operating systems and enterprise services.
• Experience troubleshooting Linux operating systems, applications, and performance issues.
• Knowledge of Linux user accounts, permissions, file systems, processes, and system logging.
• Ability to work independently and adapt to changing requirements.
• Strong technical writing and documentation skills.
• Experience creating and maintaining technical procedures and system diagrams.
• Strong analytical, problem-solving, and communication skills.