Senior Linux Systems Administrator, Large-Scale Cluster

Reflexive Concepts, LLC; Fort Meade (MD); On-site; USD 140,000 - 190,000; Full time

Job summary

Reflexive Concepts, LLC is seeking a System Administrator III to sustain a large-scale Linux computing environment supporting a critical mission. You will install and maintain software, monitor operations, and resolve issues across compute, network, memory, and storage components while ensuring security compliance.

Required qualifications include TS/SCI with FS Poly, extensive experience as a systems administrator, and Security+ certification.

Qualifications

• Experience using the Linux CLI and scripting in Bash or Python.
• Proven background installing, configuring, and supporting COTS/GOTS/FOSS in large Linux clusters.
• Familiarity with SSO policies and enterprise security procedures.
• Experience with virtualization and infra automation tools.

Responsibilities

• Install, configure, and maintain software across a large-scale Linux environment.
• Monitor system health, troubleshoot issues, and perform day-to-day operations.
• Configure network, compute, memory, and storage components for reliability.
• Maintain security integrity and implement OS enhancements for performance.

Skills

Linux CLI

Bash/Python scripting

System administration

Security compliance policies

Monitoring & troubleshooting

Infrastructure as Code

Education

Bachelor's degree in a technical discipline

20 years of relevant experience in lieu of degree

Tools

Red Hat Satellite

Splunk

VMware ESXi

SaltStack

Ansible

HPE OneView

Nagios

Docker

Kubernetes

Jira

Confluence

Job description

Reflexive Concepts, LLC is seeking a System Administrator III to sustain a large-scale Linux computing environment supporting a critical mission. You will install and maintain software, monitor operations, and resolve issues across compute, network, memory, and storage components while ensuring security compliance.

Required qualifications include TS/SCI with FS Poly, extensive experience as a systems administrator, and Security+ certification.