Computing; HPC Administrator, Principal Specialist – P3

About the Role

System Administrator, High Performance Computing (HPC) – Principal Specialist (P3). Onsite position located in Tucson, Arizona. Requires an active U.S. Secret security clearance and U.S. citizenship. The role supports heterogeneous Microsoft Windows and Red Hat Enterprise Linux HPC environments.

• Work as a member of a fast‑paced technological team.
• Help develop and implement new technologies based on industry best practices.
• Use advanced troubleshooting techniques to resolve high‑scope, complex technical problems involving HPC hardware, software, and operating systems.
• Utilize software tools, automated scripts, batch schedulers, hardware, and system‑level troubleshooting to lead and support the engineering community.
• Perform operating‑system tuning to maximize performance on HPC systems.
• Standardize processes and procedures across Digital Technology functions.
• Collaborate with cybersecurity professionals to maintain security compliance requirements.
• Provide documentation and training on advanced Digital Technology HPC processes and procedures.
• Mentor junior team members.

• University degree or equivalent experience with a minimum of 5 years of relevant experience, or an advanced degree with a minimum of 3 years of experience.
• Active U.S. government‑issued Secret security clearance required before the start date.
• U.S. citizenship.
• Experience in Windows Server and/or Linux Server environments, including directory services management and system hardening.
• Experience maintaining a medium‑sized Microsoft Windows Server environment.
• Experience with Red Hat Enterprise Linux.
• Experience with HPC scheduling and monitoring tools.
• Must obtain Department of Defense Directive 8140/8570 certification (CompTIA Security+ CE or equivalent) and an operating‑system certification within 6 months of hire.

• Experience with HPC scheduling and monitoring tools such as SLURM, Grid Engine, and Ganglia.
• Project leadership or management experience in a Digital Technology domain.
• Advanced scripting experience.
• Active DoD Secret or Top‑Secret clearance.
• Advanced hands‑on experience with Windows and Unix security hardening, system integrations, advanced troubleshooting, and authentication integration (LDAP).
• Experience in medium to high‑complexity Unix environments.

• Medical, dental, and vision insurance.
• Life insurance, short‑term and long‑term disability.
• 401(k) match and flexible spending accounts.
• Flexible work schedules and Employee Assistance Program.
• Employee Scholar Program, parental leave, paid time off, and holidays.
• Eligibility for short‑term and long‑term incentive compensation programs based on level.

Relocation support may be provided to the selected applicant if company policy eligibility criteria are met.

RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status. RTX provides affirmative action in employment for qualified individuals with a disability and protected veterans in compliance with the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.