Leidos has a new and exciting opportunity for a Principal Linux Systems Administrator in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA).  Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more.  Join us and make a difference in National Security!  

Job Summary:

Leidos is seeking a Principal Linux Systems Administrator with demonstrated experience supporting and optimizing hybrid infrastructure environments. The ideal candidate will bring strong expertise in Linux system administration, infrastructure automation, and modern HCI platforms, along with foundational Windows support.

Responsibilities Include:

Administer and maintain Linux systems across enterprise environments

Create and manage automation scripts using Ansible for provisioning and configuration

Support Windows Server environments to ensure cross-platform compatibility

Deploy and manage containerized workloads using Docker and Kubernetes

Operate and optimize hyperconverged infrastructure platforms, including Rancher and Harvester

Integrate Proxmox virtualization into existing systems and workflows

Implement identity and access controls using Centrify across hybrid deployments

Basic Qualifications:

Bachelor’s degree in a relevant field with 15+ years of experience, or No degree with 20+ years of related professional experience and IAT Level II certification (e.g., Security+ CE, SSCP)  

Quantifiable Linux Systems Administration experience in enterprise environments  Strong proficiency in Ansible scripting for automation and provisioning  Foundational experience in Windows Systems Administration  Hands-on exposure to virtualization tools including ProxMox  Familiarity with container technologies and orchestration (Docker, Kubernetes, Rancher, Harvester)  Operational understanding of HCI platforms (e.g., Nutanix, Dell VxRail, Azure Stack HCI, etc.)  Clearance Required:  Must have an active TS/SCI with Polygraph

At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today!

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We're the tech company everyone calls when things get weird. We don’t wear capes (they’re a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for “how it’s always been done.”

Original Posting:July 30, 2025

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:Pay Range $112,450.00 - $203,275.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.