Linux Administrator

The Linux Administrator provides administration, security hardening, maintenance, and operational support for Linux-based systems within a Department of Defense (DoD) environment. The position is responsible for maintaining secure, reliable, and compliant Linux infrastructure while supporting day-to-day operations, vulnerability remediation, system patching, and DoD cybersecurity requirements

Responsibilities

• Install, configure, administer, and maintain Linux servers, including Red Hat, Ubuntu, and CentOS environments.
• Secure Linux systems in accordance with DoD cybersecurity requirements, security policies, and industry best practices.
• Apply, validate, and remediate applicable DISA Security Technical Implementation Guides (STIGs).
• Perform operating system and security patching, system updates, and vulnerability remediation.
• Review vulnerability scan results, investigate findings, and implement corrective actions to maintain system compliance.
• Monitor system performance, availability, capacity, and security using appropriate monitoring and management tools.
• Troubleshoot and resolve operating system, application, configuration, performance, and connectivity issues.
• Manage user accounts, groups, permissions, privileged access, and access controls.
• Configure and maintain Linux-hosted services, including web servers, databases, file systems, and related infrastructure services.
• Implement and maintain backup, recovery, and disaster recovery capabilities.
• Automate routine system administration and maintenance activities using scripting languages such as Bash, Perl, and Python.
• Support application and infrastructure deployments and collaborate with DevOps, engineering, cybersecurity, and development teams.
• Maintain system documentation, configuration records, standard operating procedures, and technical documentation.
• Support configuration management, audit logging, security monitoring, and other controls required to maintain secure DoD computing environments.
• Ensure systems remain compliant with applicable DoD security policies, technical standards, and approved configuration baselines.

. Knowledge of and experience with installation, configuration, and integration, backups, troubleshooting, and problem resolution for servers associated with an Active Directory domain, such as DHCP and DNS

Target Requirements

• Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, Engineering, or a related technical discipline.
• Six (6) years of relevant professional experience administering and supporting Linux systems.
• Demonstrated experience securing and hardening Linux systems.
• Experience applying and validating DISA STIGs and remediating associated findings.
• Experience with Linux operating system patching, vulnerability remediation, and configuration management.
• Working knowledge of Linux system administration, access controls, system monitoring, backup/recovery, and troubleshooting.
• Experience with automation and scripting using Bash, Perl, and Python, or similar technologies.