System Administrator III

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 is seeking a skilled System Administrator III to join our team!

Reflexive Concepts is looking for a System Administrator III to sustain a large-scale Linux computing environment supporting a critical mission. In this role you will install and maintain COTS/GOTS/FOSS software, handle day-to-day operations, monitoring, and problem resolution across the compute, network, memory, and storage components of the system. You will also maintain the security integrity of the environment, configure network components, and implement operating system enhancements that improve reliability and performance.

Qualifications:

• Active TS/SCI + FS Polygraph
• Fifteen (15) years of experience as a Systems Administrator in programs and contracts of similar scope, type, and complexity, plus a Bachelor's degree in a technical discipline from an accredited college or university OR
• Twenty (20) years of experience as a Systems Administrator in programs and contracts of similar scope, type, and complexity, in lieu of a Bachelor's degree (five (5) years of additional Systems Administration experience may be substituted for the degree).
• Security+ certification

Required Skills + Experience:

• Experience using the Linux CLI
• Experience developing scripts using Bash/Python
• Experience in performing System Administration including installation, configuration, and support of COTS/GOTS/FOSS software in a large-scale Linux cluster environment
• General technical knowledge regarding compute, network, memory, and storage system components
• Experience with Red Hat Satellite systems management solution
• Familiarity using Splunk for ingesting, indexing, searching, monitoring, and analyzing big data
• Experience with the sustainment and support of large Linux clusters including day-to-day operations, monitoring and problem resolution
• Experience configuring and sustaining VMware ESXi/Virtualization environments
• Experience with IaC (Infrastructure as Code) principles and automation tools such as SaltStack and Ansible
• Experience with corporate STE/STN security compliance policies and procedures
• Experience using system monitoring tools such as HPE One View and Nagios
• Experience with containerization technologies such as Docker

Desired Skills + Experience

• Experience with container orchestration technologies such as Kubernetes
• Experience with distributed files systems such as Weka, CEPH, GPFS, and HDFS
• Experience with the Atlassian Suite of Tools such as Jira and Confluence