Linux Systems Administrator

ResponsibilitiesJob title: Tier I Linux Systems Administrator Sabre is seeking a skilled Tier I Linux Systems Administrator to support a mission-critical Department of Defense (DoD) program dedicated to high-performance computing operations. This role offers the opportunity to collaborate with senior engineers and system administrators to maintain and optimize advanced computing infrastructure. (This position is for potential upcoming work and does not represent an active opening at this time. Qualified candidates will be contacted once the position becomes available.) Duties include but not limited to: Perform general Systems Administrator functions supporting all HPC users with courteous responses to their HPC system operations and maintenance activities issues. Support Senior Systems Administrators (SA) in optimizing the functionality and performance of hardware and software components. Ensure availability, integrity, efficiency, and reliability of servers, workstations, and data storage systems (Lustre, Bright Cluster) Support other System Administrators (SA) in creating, administering, and managing Linux user accounts. Triage Tier 1 Service desk tickets and produce service ticket reports and performance metrics. Support Linux SA and Engineering team in the installation and testing of HPC system components, including setup and configuration of: Hardware and software Computing and data storage servers Networking equipment Computing peripherals Provide responsive backup management, security issues, set up and configuration of Linux servers and software. Perform timely hardware replacement not covered by third-party vendor maintenance agreements. Assist Network personnel in the configuration of networking equipment, ensuring network security, and managing firewalls. Implement necessary measures to comply with all Program security requirements. Adhere to all IT policies, processes, and procedures. Manage changing priorities. Location: The selected candidate will be required to work onsite in Arlington, VAQualificationsJob Requirements: Bachelor's degree in STEM discipline (e.g., CS, Engineering, Information Technology, etc.) and 5+ years of relevant experience Current DoD 8140 IAT II Certification (e.g., Security+ CE) VMware vSphere 6 and up Scripting (BASH, Python, or Perl) Familiarity with Kubernetes, containerized technology, Ansible, and PostgreSQL Familiarity with the Risk Management Framework (RMF), and securing and hardening Linux systems to meet RMF controls. Knowledge of CUDA, Google TensorFlow, or similar toolsets. Clearance Requirements: This position requires an active Top Secret DoD security clearance (U.S. Citizenship Required) Compensation: At Sabre Systems, LLC, compensation is based on factors such as location, qualifications, experience, and contract-specific requirements. The general salary range for this position is $70,000 - $150,000; however, final compensation will be determined by individual qualifications and applicable contract terms. #LI-CS3Compensation Statement At Sabre Systems, LLC, compensation is based on factors such as location, qualifications, experience, and contract-specific requirements; however, final compensation will be determined by individual qualifications and applicable contract terms. The general salary range for this position is as follows: $70,000.00 - $150,000.00 Sabre OverviewSabre Systems, LLC, has been providing innovative technological solutions and services for Department of Defense, Federal Civilian, and commercial customers for more than 35 years. We support the ever-evolving areas of advanced communication technologies, cyber, systems and software engineering, and digital transformation. With over three decades in business, Sabre Systems, LLC remains committed to our small business values and a people-first philosophy. We foster a welcoming, inclusive culture that values diverse perspectives and encourages open communication. Our collaborative environment supports continuous learning and professional growth at all levels. We prioritize the health, well-being, and success of our employees, offering comprehensive, evolving benefits designed to meet their diverse needs. Join us and be part of a thriving, people-driven culture. We respect the unique perspectives that a diverse workforce of minorities, women, individuals with disabilities, and protected veterans brings not only to our company, but also to our customers. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, gender identity and sexual orientation), national origin, age, disability or genetic information. EEO Minorities/Females/Disability/Veterans; VEVRAA Federal Contractor Beware of employment scams-Sabre Systems will never request payment, extend offers without an interview, or contact you from an email that doesn't end in @sabresystems.com; always apply directly at