Linux Systems Administrator

Top Secret SCI w/ Polygraph Clearance required

We are seeking a highly skilled Systems Administrator / Infrastructure Engineer to support, maintain, and optimize complex enterprise infrastructure environments. The ideal candidate will have strong experience in Red Hat Enterprise Linux (RHEL) administration, network engineering, monitoring solutions, workflow automation, and Public Key Infrastructure (PKI).

This role requires a technically versatile professional who can administer and troubleshoot enterprise systems, automate operational processes, manage infrastructure monitoring tools, and support Commercial Off-the-Shelf (COTS) applications within secure or specialized environments. The successful candidate will work across systems and network infrastructure to ensure availability, reliability, security, and optimal performance.

• Develop, implement, and maintain automated workflows and data processes using scripting languages such as Bash, Python, or similar technologies.
• Administer, configure, maintain, and optimize Nagios monitoring solutions to support infrastructure health, system availability, and performance monitoring.
• Perform advanced system administration within Red Hat Enterprise Linux (RHEL) environments, including command-line operations, configuration management, troubleshooting, and system optimization.
• Support Public Key Infrastructure (PKI), including certificate management, installation, renewal, troubleshooting, and lifecycle maintenance.
• Perform network engineering and troubleshooting activities involving routing, switching, TCP/IP, and enterprise-scale network infrastructure.
• Install, configure, maintain, and troubleshoot Commercial Off-the-Shelf (COTS) applications and tools within secure or specialized environments.
• Monitor system performance, identify infrastructure issues, and implement corrective actions to improve reliability and operational efficiency.
• Troubleshoot complex hardware, software, operating system, and network-related issues across interconnected infrastructure environments.
• Collaborate with engineering, cybersecurity, network, and operations teams to support infrastructure stability and mission-critical services.
• Develop and maintain technical documentation, operational procedures, and system configuration records.