Linux Systems Administrator – Security Clearance Required

Company Overview

Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact, advancing science and technology to strengthen U.S. security and promote global stability.

Linux Systems Administrator – provides advanced technical infrastructure support for Linux systems in a complex classified and unclassified computing environment. serves as a subject matter expert, collaborates with customers and technical partners to define requirements, design solutions, and leads resolution of complex system issues. Part of the Information Technology Operations (ITO) Division within the Computing Directorate.

• Provide Tier 3 support for Linux and storage systems, including incident resolution, root cause analysis, and long‑term remediation on classified and unclassified networks.
• Architect, implement, and maintain diskless Linux environments, including PXE booting and provisioning, and identity and authentication services such as FreeIPA.
• Implement technical standards for Linux hardening aligned with STIGs, CIS benchmarks, and security baseline standards.
• Monitor and optimize system performance, capacity planning, reliability engineering, and lifecycle management across Linux platforms.
• Create and maintain documentation for system architectures, procedures, runbooks, and troubleshooting guides.
• Collaborate with cybersecurity teams to support vulnerability management, incident response, and audit activities on both classified and unclassified systems.
• Perform installation of software releases, patches, and third‑party or open‑source software.
• Collaborate with management, customers, and team members to evaluate and recommend procurement of Linux hardware and software.
• Perform other duties as assigned.

• Act as internal and external consultant, advising on Linux architecture, security, performance, and operational strategy.
• Implement highly advanced designs in collaboration with data scientists and infrastructure architects.
• Lead advanced projects from concept through implementation, coordinating technical scope, milestones, risks, and customer communication.
• Provide technical direction on complex operational and project‑based work to team members.

• Active DOE Q clearance (or active Top Secret clearance) with ability to obtain and maintain SCI access.
• Ability to successfully complete a lifestyle polygraph.
• Bachelor’s degree in Computer, Information Technology, or Engineering, or equivalent technical training and experience.
• Strong understanding of networking fundamentals (TCP/IP, DNS, routing, firewalls) as they relate to Linux.
• Broad and in‒depth knowledge of Linux operating systems and related hardware.
• Experience supporting diskless Linux infrastructure, including PXE booting.
• Experience applying security hardening standards in strict compliance environments.
• Experience with complex troubleshooting and patching operating systems.
• Advanced ability to set priorities and independently resolve complex problems.
• Proficient interpersonal and communication skills, able to work independently and interact with multi‒disciplinary staff.

• Experience architecting and deploying Linux infrastructure for high‑security environments.
• Highly advanced knowledge of Linux, virtual environments, and related hardware.
• Experience working on cross‑functional technical efforts involving systems, storage, network, and cybersecurity teams.
• Recognized subject matter expert, defining technical standards and participating in technical reviews, audits, or customer engagements.

• Enterprise support tools experience for management, patching, backup, or software distribution.
• Experience writing intermediate to advanced shell scripts.
• Experience with one or more of SPLUNK, Tenable, Nessus, Puppet, Ansible, Nagios, RHN Satellite, PKI, Active Directory, Scripting, GIT, BIND, DNS, Perl, CSH/BASH, Docker, Podman, or other container technologies.

Level 393.1: $125,310 – $153,444 annually.

Level 393.2: $151,620 – $185,640 annually.

• Flexible Benefits Package
• 401(k) matching
• Relocation…