Senior Linux Systems Admin for Secure Mission Ops

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

Benefits offered by this job

Paid time off

11 paid holidays

401(k) with company match

Flexible schedules

Discounted stock purchase plans

Technical upskilling

Education and training support

Parental paid leave

Sign-on bonus

Job summary

Leidos LLC is seeking a Systems Administrator to support Linux‑based infrastructure across development, test, and production. The role emphasizes hands‑on Linux administration, security hardening, automation, and collaboration with cross‑functional teams in a mission‑critical environment.

Qualified candidates will have extensive Linux experience, AWS proficiency, and an active TS/SCI clearance with polygraph. This position offers competitive benefits and a sign‑on bonus.

Qualifications

• Bachelor's degree in a technical discipline with 5 years of related experience; or 5 additional years in lieu of a degree.
• Extensive hands-on Linux systems administration in RHEL or equivalent environments.
• Automation/configuration management using Ansible, Bash, Python or similar.
• Experience with AWS services (EC2, ECS, EKS, SSM, CloudFormation).
• Active TS/SCI clearance with polygraph.

Responsibilities

• Administer, configure, secure, monitor, and troubleshoot Linux systems across Development, Test, and Production environments.
• Lead root-cause analysis across OS, applications, storage, authentication, performance, and networking issues.
• Manage lifecycle activities: accounts, permissions, patching, packaging, services, upgrades.
• Implement Linux security controls, hardening, and vulnerability remediation; ensure compliance baselines.
• Develop automation using Ansible, Bash, and Python to improve consistency and efficiency.
• Collaborate with SAs/DBAs/SWEs/SEs and document configurations and runbooks.

Skills

Linux administration

AWS experience

Automation with Ansible

Python/Bash scripting

Troubleshooting

Security clearance TS/SCI

Education

Bachelor's degree in a technical discipline

Tools

Ansible

Bash

Python

Linux command line

Job description

Leidos LLC is seeking a Systems Administrator to support Linux‑based infrastructure across development, test, and production. The role emphasizes hands‑on Linux administration, security hardening, automation, and collaboration with cross‑functional teams in a mission‑critical environment.

Qualified candidates will have extensive Linux experience, AWS proficiency, and an active TS/SCI clearance with polygraph. This position offers competitive benefits and a sign‑on bonus.