Linux Systems Administrator Jobs in Arizona (NOW HIRING)

Date Posted:
2026-06-16
Country:
United States of America
Location:
US-AZ-TUCSON-M05 ~ 1151 E Hermans Rd ~ BLDG M05 (External Site)
Position Role Type:
Onsite
U.S. Citizen, U.S. Person, or Immigration Status Requirements:
The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
Security Clearance Type:
DoD Clearance: Secret
Security Clearance Status:
Active and existing security clearance required after day 1
Senior Principal High Performance Computing (HPC) Administrator
(Manager, Information Workplace Services - P4)
Raytheon Digital Technology - Classified Information Services
Tucson, AZ - Onsite position
At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.
Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today's mission and stay ahead of tomorrow's threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.
This High-Performance Computing (HPC) candidate (Manager Information Workplace Services - P4) will provide Raytheon Digital Technology High Performance Computing Administration in a heterogeneous Microsoft Windows and Red Hat Enterprise Linux environment. This candidate will understand Windows Server internals, hardware troubleshooting and knowledge of Linux administration. This position is an onsite role in our Tucson Arizona location. Relocation support will be provided to the selected applicant if they meet company policy eligibility requirements.
What You Will Do:

• Work as a team member in a fast-paced technological environment.
• Help develop and implement new technologies based upon industry best practices.
• Use troubleshooting techniques to resolve technical problems at a high scope and complexity to include the integration, maintenance and troubleshooting of High-Performance Computing hardware, software, and operating systems (OS).
• Understanding software tools, automated scripts, batch schedulers, hardware, and system-level troubleshooting, to lead and support the engineering community.
• Perform OS tuning to maximize system performance on high performance computing systems. Work across DT functions to standardize processes and procedures.
• Work with Cybersecurity professionals to maintain security compliance requirements.
• Provide documentation and training on advanced DT HPC processes and procedures. Be a mentor to junior team members.
• Must be able to obtain required Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification and an Operating System Certification) within 6 months of hire date.

Qualifications You Must Have:

• Typically requires a University Degree or equivalent experience and minimum 8 years prior relevant experience, or An Advanced Degree in a related field and minimum 5 years' experience
• The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
• Experience in Windows and 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

Qualifications We Prefer:

• Experience with High Performance Computing scheduling and monitoring tools as well as hardware troubleshooting
• High Performance Computing (HPC) experience in a Linux environment.
• Experience in Project Leadership, Management, or Project management in a DT domain Basic to advance scripting experience.
• An active DoD Secret or Top Secret Clearance.
• Advanced hands-on experience with Windows and Linux security hardening, systems integration, advanced troubleshooting, and authentication service integration.
• Red Hat Certified System Administrator or Red Hat Certified Engineer
• Knowledge of file system architecture
• Cloud certified to include experience with HPC Cloud management
• Experience with Ansible and automation
• IPMI, iLO, and/or iDRAC Administration
• Advanced knowledge of High-Performance Computing scheduling and monitoring tools such as SLURM, Ganglia, Promethius and Grafana

What We Offer

• Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.

• Relocation Eligibility - this role is relocation eligible according to company policy guidelines.

Learn More & Apply Now!
Please ensure the role type defined below is appropriate for your needs before applying to this role. This position is classified as:
Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.
Candidates will learn more about role type and current site status throughout the recruiting process. For onsite and hybrid roles, commuting to and from the assigned site is the employee's personal responsibility.
As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.
The salary range for this role is 107,500 USD - 204,500 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate's work experience, location, education/training, and key skills.
Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement.
Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company's performance.
This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.
RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.
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, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans' Readjustment Assistance Act.
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