Senior Linux Systems Administrator — TS/SCI Poly

Leidos; Columbia (MD); On-site; USD 73,000 - 133,000; Full time

Benefits offered by this job

Paid Time Off

11 paid Holidays

401K with 6% company match

Flexible schedules

Discounted stock purchase plans

Technical upskilling

Job summary

Leidos is seeking a Systems Administrator to support Linux-based infrastructure across Development, Test, and Production environments. The ideal candidate brings deep hands-on Linux administration experience, security hardening, and automation skills using Ansible, Bash, and Python.

The role requires working with AWS services and cloud deployments, strong troubleshooting, and collaboration with cross-functional teams. A TS/SCI clearance is required for this position.

Qualifications

• Bachelor's degree in a technical discipline with 5+ years of related experience.
• Hands-on Linux administration experience on RHEL or equivalent.
• Experience with automation/configuration using Ansible, Bash, or Python.
• Strong troubleshooting, networking basics, and security hardening knowledge.
• Experience with AWS services and cloud-based deployments.
• Active TS/SCI clearance with polygraph.

Responsibilities

• Administer, configure, secure, monitor, and troubleshoot RHEL/Linux systems across Dev, Test, and Prod environments.
• Lead root-cause analysis across OS, applications, storage, authentication, and networking.
• Manage lifecycle activities: accounts, permissions, patching, services, and maintenance.
• Implement security controls, baselines, vulnerability remediation, and change control processes.
• Develop automation/configuration management using Ansible, Bash, Python to improve reliability.
• Collaborate with SAs, DBAs, SWEs, SEs, testers to create sustainable solutions.
• Develop documentation, SOPs, runbooks, and participate in on-call support.

Skills

Linux administration

Ansible

Bash

Python

AWS

Networking fundamentals

TS/SCI clearance

Education

Bachelor's degree in a technical discipline

Tools

AWS

Terraform/CloudFormation

Kubernetes

Jira/Confluence

Splunk/Elastic

Job description

Leidos is seeking a Systems Administrator to support Linux-based infrastructure across Development, Test, and Production environments. The ideal candidate brings deep hands-on Linux administration experience, security hardening, and automation skills using Ansible, Bash, and Python.

The role requires working with AWS services and cloud deployments, strong troubleshooting, and collaboration with cross-functional teams. A TS/SCI clearance is required for this position.