Linux System Administrator

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.

• 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.

• 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.