Senior HPC Linux Systems Engineer

COMPANY OVERVIEW XCEL Engineering, Inc. is an award-winning small business that provides trusted information technology, engineering, consulting and project management solutions and services to federal agencies and organizations. Originally founded in 1971 by professional engineers at the University of Tennessee, XCEL was acquired in 2003 by U.S. Army and Navy veterans and in 2023 became a MartinFed company. XCEL Engineering is a part of IT Lab Partners (ITLP) which was created to support a leading research facility in the East Tennessee region in recruiting the best and the brightest technical talent. Considering joining our impressive team today! JOB OVERVIEW XCEL Engineering is seeking a qualified applicant for a Senior HPC Linux Systems Engineer to work for the National Center for Computational Sciences (NCCS) at Oak Ridge National Lab (ORNL), which hosts several of the world's most powerful computer systems, is seeking a highly qualified individual to play a key role in improving the security, performance, and reliability of the NCCS computing environments. This includes supporting one of the fastest supercomputers in the world, Frontier, along with numerous commodity clusters and specialized programs and partnerships. Frontier is one of the scientific research community's most powerful computational instruments for exploring solutions to some of today's most challenging problems. ESSENTIAL FUNCTIONS Install, integrate, and administer HPC Linux clusters and high-speed networks Diagnosing system operational problems quickly and effectively Coordinating with vendors to resolve hardware and software problems Recommending, planning, and coordinating hardware and software changes with customer participation using change management processes Porting and writing system management tools Documenting system administration procedures for routine and complex tasks Participating in a 24-hour, 7-day on-call support rotation and off-hours maintenance windows System implementation/integration into the NCCS environment and systems performance Lead system deployment, integration and troubleshooting of a large-scale computer Participate in relevant systems topics with the internal and external community of peers contributing experiences and solutions. Mentor junior-level staff as they join the Deliver ORNL's mission by aligning behaviors, priorities, and interactions with our core values of Impact, Integrity, Teamwork, Safety, and Service. BASIC QUALIFICATIONS Bachelor's Degree in a scientific or technical field 8+ years of Linux systems experience is required An equivalent combination of education and experience will be considered DESIRED QUALIFICATIONS Experience managing Linux operating systems in a large-scale system environment Solid understanding of networked computing environment concepts Experience with Linux Cluster Administration Ability to develop and maintain programs and scripts that aid in the operation and automation of administrative tasks using various shell and scripting languages (bash, Python, Go) Experience with Lustre and GPFS file systems Experience with batch schedulers (particularly SLURM) Experience deploying and maintaining automated configuration management software such as Puppet Strong interpersonal and communication skills Ability to work as a team player Proactive and solution-oriented problem solver Prior project and/or team leadership experience PHYSICAL REQUIREMENTS & ENVIRONMENTAL CONDITIONS Inside office environment. Working on a computer for long periods of time. May involve long period of sitting at a desk. The work environment is fast-paced and sometimes involves extreme deadline pressures. OTHER DUTIES This job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice. Xcel Engineering is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regards to race, color, religion, religious creed, gender, sexual orientation, gender identity, gender expression, transgender, pregnancy, marital status, national origin, ancestry, citizenship status, age, disability, protected Veteran Status, genetics or any other characteristics protected by applicable federal, state or local law. If you are a qualified individual with a disability or disabled veteran, you have the right to request a reasonable accommodation if you are unable or limited in your ability to use or access Xcel Engineering's current openings as a result of your disability. You can request reasonable accommodations by calling 855.212.1810. Thank you for your interest in Xcel Engineering. All positions at Xcel Engineering, Inc. are contingent upon passing both a background check and drug screening prior to a start date and are subject to random drug screenings during the employment period. In addition, Xcel Engineering is an E-Verify employer.

Created: 2026-03-04