Principal Linux System Administrator (Onsite) at RTX in Tucson, AZ

Principal Linux System Administrator (Onsite) Location: US-AZ-TUCSON-802 ~ 1151 E Hermans Rd ~ BLDG 802 Date Posted: 2026-05-08 Country: United States of America Location: US-AZ-TUCSON-802 ~ 1151 E Hermans Rd ~ BLDG 802 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date.​ 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 on day 1 At RTX, the world 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. At Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. We bring 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. Our team solves tough, meaningful problems that create a safer, more secure world. We are hiring for a Principal Systems Administrator to join our Digital Technology (DT) team in Tucson, AZ. The DT organization ensures that Raytheon teammates across the globe are able to communicate, collaborate and innovate for customer success. We create leading-edge technology solutions to prevent security threats, secure the integrity of our systems and support IT infrastructures around the world. The Principal System Administrators collaborate across the business to support exciting, critical programs with classified information system capabilities. Success in this role means you can develop, implement and maintain secure, cost-efficient environments across various classified programs. Program teams rely on your collaboration and guidance to define computing requirements and create end-to-end solutions to solve complex IT infrastructure problems. What You Will Do: Provide IT systems administration in a heterogeneous Microsoft Windows and Red Hat Enterprise Linux environment, with a strong focus on RHEL systems management and lifecycle support. Apply solid understanding of Linux fundamentals, including systemd, SELinux, networking, DNS, DHCP, and integration with Active Directory for authentication. Support interoperability between Linux and Windows systems using established identity management tools. Work as part of a collaborative team in a fast‑paced, air‑gapped, classified environment. Use advanced troubleshooting techniques to resolve moderate to complex technical issues involving operating systems, virtualized workloads, and hardware integration. Support Linux provisioning and configuration tasks including kickstart deployments, automated configuration using Ansible, package management, and container workloads using Podman. Assist with patching processes in a closed network environment where updates are manually introduced. Perform routine backup, restore, and RAID-related tasks as needed. Install and configure software packages requested by end users, ensuring systems remain compliant with cybersecurity requirements. Partner closely with Cybersecurity professionals to maintain required security posture, support RMF/NISPOM/JSIG-aligned processes, and deliver documentation, guidance, and training on advanced IT procedures. Develop solutions and technical documentation for a wide variety of Linux and Windows issues. Systems operate 24x7 and may require occasional work outside standard hours. Position requires up to 5% travel and is a full-time onsite role. Qualifications You Must Have: Typically requires a Bachelor’s degree and minimum of 5 years of relevant experience, or a Master’s degree with 3 years of experience Linux experience and Red Hat Enterprise Linux Experience supporting Windows systems in an enterprise environment Experience in one or more of the following areas: Active Directory administration, VMware virtualization, database, or network administration Must be able to obtain DoD 8140/8570 certification requirements (CompTIA Security+ CE or equivalent) within 6 months of start Qualifications We Prefer: VMware experience, including vCenter, ESXi, and virtual machine lifecycle management Active DoD TS/SCI with Polygraph or prior SCI/program eligibility Current DoD 8140/8570 certifications, including Security+ CE or equivalent OS-level certifications Experience with NISPOM, JAFAN, JSIG, DFARS, or Risk Management Framework (RMF) processes Experience with Red Hat ecosystem tools such as Ansible, Podman, SELinux, kickstart provisioning, and Linux automation Experience administering Windows Server technologies including WSUS or Exchange in a classified environment Knowledge of data storage concepts, including SAN/NAS solutions and NFS implementations Exposure to containerization and early-stage adoption of Kubernetes or Rancher Experience supporting engineers working with software development, simulations, or hardware development workflows Experience scripting in Bash, Ansible, or PowerShell for automation and tooling HPC environment support experience 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. What We Offer: Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Trust, Respect, Accountability, Collaboration, and Innovation. 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. This position is offering relocation assistance. Learn more about our Tucson site location here: Raytheon Tucson, AZ Location This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm 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 86,800 USD - 165,200 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. Privacy Policy and Terms: Click on this link to read the Policy and Terms