Location: Oak Ridge, TN
Cap-Exempt H-1B Position — No lottery required
Requisition Id 15958 **Overview** **This job posting represents multiple potential openings for senior-level roles across ORNL’s high-performance computing ecosystem.** Oak Ridge National Laboratory (ORNL) is seeking Senior HPC (High-Performance Computing) Linux Systems Engineers to serve as technical leaders supporting some of the most advanced computing environments in the world. Senior HPC Linux Systems Engineers are recognized experts who lead the design, implementation, and optimization of complex HPC infrastructure. They manage large-scale technical projects, guide technical direction for their teams, and serve as trusted advisors to scientific and operational leadership across ORNL. **Major Duties and Responsibilities** - Provide technical leadership in the design, integration, and administration of large-scale Linux-based HPC clusters, high-speed networks, and storage systems. - Lead medium to large technical projects, coordinating requirements, schedules, and deliverables across internal and external stakeholders. - Architect and deploy advanced infrastructure solutions supporting exascale-class and mission-critical computing environments. - Serve as a technical mentor for HPC engineers, guiding best practices in automation, performance tuning, and system security. - Develop, implement, and maintain configuration management and automation frameworks (e.g., Ansible, Puppet, Salt) to enhance reliability and reproducibility. - Perform advanced system performance analysis, troubleshooting, and optimization, ensuring system scalability and long-term sustainability. - Manage critical vendor and partner relationships, representing ORNL’s technical requirements during procurement, integration, and system acceptance. - Contribute to strategic planning and technology roadmaps, influencing unit goals and technical direction. - Collaborate closely with scientists, researchers, and IT specialists to align infrastructure capabilities with research and security objectives