> Markdown version of [/jobs/ext/2273597-linux-engineer-classified-environment](https://www.wearedevelopers.com/jobs/ext/2273597-linux-engineer-classified-environment). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Linux Engineer (Classified Environment) - **Company:** Oak Ridge National Laboratory - **Location:** Oak Ridge, TN, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Active Directory, Artificial Intelligence, Bash Shell, Configuration Management, Cyber Security, Continuous Integration, Linux, General-Purpose Computing on Graphics Processing Units, Python (Programming Language), Kerberos (Protocol), Kernel-Based Virtual Machine, Lightweight Directory Access Protocols (LDAP), Linux System Administration, Performance Tuning, Public Key Infrastructure, Red Hat Enterprise Linux, Virtualization Technology, Software Vulnerability Management, Data Logging, Scripting, High Performance Computing, Software Troubleshooting, Git, SC Clearance, Kubernetes, Build Tools, Machine Learning Operations, Vmware - **Published:** August 27, 2026 - **Apply:** https://jobs.localjobnetwork.com/apply/add/88156237/1 ## About the Role * BS degree in a related technical field and at leastfive years of Linux engineering or administration experience. Equivalent education, experience, and certifications may be considered. * CurrentTop-Secret clearance with Q and SCI eligibility. * Demonstrated expertise withRHEL/Linux engineering, troubleshooting, performance tuning, automation, and scripting. * Experience withAnsible, Python, Bash, enterprise virtualization, identity integration, storage, monitoring/logging, and cybersecurity compliance. * Strong analytical and problem-solving skills with the ability to independently solve complex technical challenges and collaborate across multidisciplinary teams., Experience in one or more of the following: * Classified, Intelligence Community, DoD, DOE, or other highly regulated computing environments. * HPC, AI/ML infrastructure, GPU computing, containers, Kubernetes, or advanced computing platforms. * Infrastructure-as-code, advanced automation, CI/CD, or enterprise configuration management. * Enterprise virtualization, storage, backup, and disaster-recovery architectures. * RMF, NIST 800-53, STIG implementation, vulnerability management, or authorization activities. * Designing or modernizing enterprise Linux environments and introducing emerging technologies. * Relevant Linux, automation, cybersecurity, virtualization, or cloud certifications. Special Requirements: * Visa sponsorship: Visa sponsorship is not available for this position. * Security, Credentials, and Eligibility Requirements: Q clearance with SCI: This position requires the ability to obtain and maintain a Secret Compartmented Information (SCI) clearance from the Department of Energy. As such, this position is a Workplace Substance Abuse (WSAP) testing designated position. WSAP positions require passing a pre-placement drug test and participation in an ongoing random drug testing program. In addition, due the SCI, you may also be subject to random polygraph testing. ## Description The Field Intelligence Operations Division (FIOD) of the National Security Directorate (NSSD), is seeking an exceptional Linux Engineer to help design, build, and advance the secure computing environments behind some of the nation's most consequential national security, intelligence, and scientific missions. You'll have genuine ownership over mission-critical accounts and work closely with a small, focused team trusted to execute with minimal supervision. The position requires Top-Secret Clearance with access to Q and SCI. This is not a traditional Linux administration role. You will work at the intersection of advanced Linux engineering, cybersecurity, high-performance computing, emerging technologies, and classified mission systems-solving complex technical challenges in environments where security, reliability, and performance are critical. As a Linux Engineer, you will help architect, implement, automate, operate, and continuously modernize highly secure Linux infrastructure supporting both current missions and rapidly evolving capabilities. You will work across multiple security domains and collaborate with cybersecurity professionals, systems and network engineers, scientists, researchers, and mission partners to turn demanding requirements into resilient, scalable, and secure computing solutions. We are looking for someone who enjoys building, automating, troubleshooting, experimenting, and solving problems others cannot. The ideal candidate brings deep Linux expertise, a strong engineering mindset, curiosity about emerging technologies, and the drive to continually improve how secure computing environments are designed and operated. If you are a Linux engineer who wants more than routine administration-and you want to apply your skills to technically challenging problems with real national impact-this is an opportunity to build systems that matter., * Engineer and modernize secure Linux infrastructuresupporting classified national security, intelligence, scientific, HPC, and emerging mission environments, primarily using Red Hat Enterprise Linux (RHEL) and related distributions. * Design, build, configure, optimize, and sustain physical and virtual Linux platforms across multiple security domains. * Develop automation usingAnsible, Python, Bash, and Git-based workflowsto improve deployment, configuration, patching, compliance, reliability, and operational efficiency. * Implement cybersecurity requirements includingRMF, NIST 800-53, STIGs, DOE directives, and ICD 503, including system hardening, vulnerability remediation, monitoring, and secure logging. * Integrate Linux environments with enterpriseidentity, virtualization, storage, backup, and monitoringcapabilities, including Active Directory, LDAP, Kerberos, PKI, VMware, and KVM. * Troubleshoot complex technical issues and partner with cybersecurity, networking, storage, application, HPC, and mission teams to develop secure, scalable solutions. * Evaluate and introducenew technologies, architectures, and engineering approachesthat advance infrastructure modernization and emerging mission capabilities. * Support mission-critical operations, planned maintenance, and occasional after-hours requirements. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Generating code with Angular schematics](https://www.wearedevelopers.com/videos/129-generating-code-with-angular-schematics) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Best Countries for Software Engineers](https://www.wearedevelopers.com/magazine/267-best-countries-for-software-engineers) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)