Linux Systems Administrator

Linux Systems AdministratorAt BWXT Technologies, Inc., we are People Strong, Innovation Driven. A U.S.-based company, BWXT is a Fortune 1000 and Defense News Top 100 manufacturing and engineering innovator that provides safe and effective nuclear solutions for global security, clean energy, environmental restoration, nuclear medicine and space exploration. With more than 7,800 employees, BWXT has 14 major operating sites in the U.S., Canada and the U.K. We are the sole manufacturer of naval nuclear reactors for U.S. submarines and aircraft carriers. Our company supplies precision manufactured components, services and fuel for the commercial nuclear power industry across four continents. Our joint ventures provide environmental restoration and operations management at a dozen U.S. Department of Energy and NASA facilities. BWXT's technology is driving advances in medical radioisotope production in North America and microreactors for various defense and space applications.Welcome to BWXT. We believe in empowering our employees and cultivating a dynamic workplace that fosters growth, collaboration, and technical excellence. At our Oak Ridge, Tennessee Enrichment Operations site, you will join teams working at the forefront of advanced nuclear manufacturing, precision engineering, and mission-critical national security programs. Whether you're an experienced professional or just starting your career, you'll find opportunities to challenge yourself, partner with seasoned experts, and contribute to innovation shaping the future of nuclear technology.Position Overview: As our Linux Systems Administrator, you will support secure, high-availability computing environments essential to engineering, manufacturing, simulation, and analytics operations at the Oak Ridge Enrichment Operations site. You will maintain, configure, and optimize Linux-based systems, storage solutions, user environments, and automation frameworks. Operating in a DOE/NNSA high-security environment, you will ensure reliability, cybersecurity compliance, and performance across mission-critical computing infrastructure.Location: On-site in Oak Ridge, Tennessee (Q Clearance Required)Your Day to Day as a Linux Systems Administrator:Install, configure, harden, and maintain Linux systems (RHEL, Rocky, Ubuntu, or similar) supporting engineering and manufacturing operations.Manage authentication services, user/group permissions, identity controls, and privileged access workflows.Implement secure configurations aligned with DOE/NNSA cybersecurity requirements.Administer storage environments, NFS/SMB shares, file systems, backups, and disaster recovery procedures.Monitor system performance, troubleshoot infrastructure issues, and optimize compute environments.Develop scripts and automation using Bash, Python, or Ansible to streamline administrative tasks.Manage patching, update cycles, OS lifecycle management, and package repositories.Support virtualization or container tooling (VMware, KVM, Docker/Podman).Work closely with cybersecurity teams to conduct audits, monitor compliance, and resolve findings.Provide technical support for engineering workloads, simulation tools, HPC environments, or manufacturing systems.Maintain secure documentation including system configurations, runbooks, network diagrams, and compliance records.Assist in rollout of new servers, infrastructure upgrades, and modernization initiatives.Collaborate with cross-functional engineering, IT, operations, and security teams.Required Qualifications:Bachelor's degree in Computer Science, Information Technology, Cybersecurity, Engineering, or related field (or equivalent experience).Minimum 3+ years of experience administering Linux systems in production environments.Proficiency with Linux administration, shell scripting, networking fundamentals, and system monitoring.Experience with automation tools (Ansible, Bash, Python) and system-hardening practices.Knowledge of virtualization or container technologies.Experience maintaining secure environments and applying compliance frameworks.Strong troubleshooting and documentation skills.Must be a U.S. citizen with ability to obtain and maintain a DOE Q clearance.Must be able to obtain and maintain a DOE security clearance.Preferred Qualifications:Experience in classified, regulated, or high-security IT environments.Familiarity with HPC systems, cluster management, or distributed computing.Experience with CI/CD tooling, Git, or automated deployment pipelines.Knowledge of monitoring platforms such as Nagios, Prometheus, Grafana, or Elastic.Experience with identity management tools (FreeIPA, Active Directory integration, LDAP).Certifications such as RHCSA, RHCE, CompTIA Linux+, or Security+.Experience supporting engineering simulation workloads or manufacturing IT infrastructure.What We Offer:Competitive salary and benefits package.Flexible schedules and paid time off (as applicable for IT roles).Professional training, certification support, and career development pathways.Inclusive, collaborative culture with cross-generational teamwork.Opportunities to directly support mission-critical DOE/NNSA operations.Continuous learning and exposure to advanced high-security computing environments.Pay: $70,000 - $103,000