Senior Linux Systems Administrator (NDA 4)

Leidos has a new and exciting opportunity for a Senior 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:

Our LOE program provides our customer's Operations organization with the best possible solutions for their mission needs. We achieve this through rapid prototyping, new development, and advanced technology research. From leading-edge visualizations to analytic development, we're always pushing the boundaries to find new and better data sources and tradecraft to answer intelligence questions. With a focus on collaboration and a fast-paced environment, our prototype development program is the ideal place to grow your skills and make a real impact. Click here to learn more about how this program "Delivers Mission Success!"

Seeking a motivated and experienced Linux System Administrator for a small, diverse team that provides end-to-end software, systems, and network engineering services to support Integrated Discovery Operations (IDO). You will lead, evolve, and maintain a dynamic, modern DevOps architecture, often based on open-source technology and not relying on corporate baselines, to support software developers, phased system upgrades, compliance, and improvements aimed at ensuring continued execution of the IDO mission. We aim to improve availability and reliability, reduce latency, and optimize performance, while maintaining the security posture.

Job Responsibilities/Qualifications:

• Mission Focus: Design, maintain, and support operations and maintenance (O&M) activities of a large enclave comprised of various hardware, software, and network components to include server architecture, virtual machines, managed switches, NAS, VLANs, and VPNs. Develop and carry out strategies to migrate existing customers to new architecture and technology with minimal impact. Evaluate new technologies or equipment that can be added to Agency standard solutions.
• Technical Proficiency: Network administration including installing, configuring, and maintaining net devices; configuring various routing protocols, troubleshooting multi-hop connectivity, throughput, and latency; setting up firewalls. Responsible for secure infrastructure and vulnerability corrections, data security, compliance, and backups and recovery. Maintain SSPs, STE/STN requirements via RMF, Netseer, SEAR logging, patching, IAVMs, McAfee, and UAM.
• Responsible for user-level support, including interacting with system-savvy developers and analysts, resolving network, computer, and virtual system issues & anomalies.
• Maintain enclave documentation (network diagram, system names, IP addresses, barcodes, etc.); provide monthly activity report to include system outages.
• Experience deploying and maintaining nginx; system monitoring platforms like OpenVAS, Prometheus and Grafana; SELinux and FIPS
• Knowledge of LatteArt/Biscotti, Netseer, SEAR logging
• Qualifications: Bachelor's degree plus eleven (11) to fifteen (15) years of relevant systems administration experience or equivalent.
• Security Clearance: Candidates must possess an active TS/SCI with Polygraph to be considered for this role.
• Desirable Skills: Familiarity with Docker, MongoDB, and Elastic Search; Ansible and GitLab; RedHat Satellite. Working knowledge of software-defined networks.

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!

Careers.leidos.com

Conmd

At Leidos, we don't want someone who "fits the mold"-we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, "what's next?" before the dust settles on "what's now."

If you're already scheming step 20 while everyone else is still debating step 2... good. You'll fit right in.

Original Posting:
October 7, 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 $116,350.00 - $210,325.00

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.