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
Come break things (in a good way). Then build them smarter.
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:October 7, 2025For 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.
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.
Top Skills
What We Do
We Are Leidos
For 50 years we have been tackling some of the biggest problems that face our nation and our world.
OUR MISSION
Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020.
Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.
Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.
Your most important work is ahead.
