Principal Linux Systems Administrator

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 can communicate, collaborate and innovate for customer success while the Principal System Administrator supports critical classified programs by developing, implementing and maintaining secure and cost‑efficient IT environments.

• Provide IT systems administration in a heterogeneous Microsoft Windows and Red Hat Enterprise Linux environment, focusing on RHEL systems management and lifecycle support.
• Apply Linux fundamentals including system, SELinux, networking, DNS, DHCP, and integration with Active Directory for authentication; support interoperability between Linux and Windows with established identity management tools.
• Work as part of a collaborative team in a fast‑paced, air‑gapped, classified environment, using advanced troubleshooting techniques to resolve moderate‑to‑complex technical issues involving operating systems, virtualized workloads and hardware integration.
• Support Linux provisioning and configuration tasks: 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 the 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.

• University degree or equivalent experience with a minimum of 5 years of prior relevant experience; an advanced degree with a minimum of 3 years experience is also acceptable.
• Active and transferable U.S. government‑issued Secret security clearance prior to start date; U.S. citizenship is required.
• Linux experience and/or Red Hat Enterprise Linux.
• 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.

• Experience supporting Windows systems in an enterprise environment.
• 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.
• Experience with data storage concepts, including SAN/NAS solutions and NFS implementations.
• Experience with 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 Power Shell for automation and tooling.
• HPC environment support experience.

Salary range for this role is 86,800 USD – 165,200 USD. Hired applicants may be eligible for benefits including medical, dental, vision, life insurance, short‑term and 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. Benefits depend on the specific business unit and may be subject to collective‑bargaining agreement.

Hired applicants may be eligible for short‑term and long‑term incentive compensation programs depending on the level of the position and coverage by a collective‑bargaining agreement.

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.