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# Sr. Principal Systems Administrator, LINUX (ONSITE)

- **Company:** RTX
- **Location:** El Segundo, CA, United States
- **Experience:** Expert
- **Salary:** $118,300.0 - $224,900.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Antivirus Softwares, Backup Devices, Bash Shell, CompTIA Security+, System Configuration, Linux, File Server, Identity and Access Management, Windows Servers, Red Hat Enterprise Linux, Ansible, Server Administration, Service Pack, Scripting, Data Storage Management, Data Storage Technologies, Virtual Computing, Information Technology, Hardware Infrastructure, National Industrial Security Program Operating Manual (NISPOM), Multiplatform
- **Published:** October 30, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9277836/sr-principal-systems-administrator-linux-onsite

## About the Role

* Experience using Linux, Windows Servers, and Virtual computing methods.

 * 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
 * U.S. Citizen - the ability to obtain and maintain a government active and existing Secret security clearance, required after day 1 as only U.S. citizens are eligible for a security clearance.

 * Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) within a reasonable amount of time

Qualifications We Prefer

 * Active DoD T/S clearance, or the ability to obtain one

 * Direct working experience with NISPOM, JAFAN, JSIG, DFARS and/or DoD/RMF

 * In-depth working experience in RedHat Enterprise Linux

 * Experience with data storage, NAS, and SAN technologies and solutions

 * Scripting Experience (Ansible, Bash)

## Description

Raytheon currently has an exciting IT position available that supports the Raytheon mission of making the world a safer place. We are currently seeking a Systems Administrator that will be working onsite in a highly collaborative, multi-platform and multi-disciplined environment. The Systems Administrator is required to have an active secret security clearance as they will be responsible for deploying and maintaining classified IT infrastructures. The candidate's day-to-day activities include but are not limited to: Server management; storage management; file server management; access management; data backup; software and license configuration; and workstation support. Each day in the life of a Systems Administrator can bring something new - building a new IT infrastructure for a group of engineers, restoring files due to an outage, updating virus definitions and security patches, teaming with our brilliant engineers on how to improve their processes, and more.

What You Will Do

 * Provide IT systems administration in a heterogeneous RedHat Enterprise/Microsoft Windows and environment.

 * Lead and coordinate infrastructure installation and configuration.

 * Collaborate with teams and mentor junior admins.

 * Work as a team member in a fast-paced technological environment. Use troubleshooting techniques to resolve technical problems of moderate to high scope and complexity to include the integration of hardware and operating systems (OS).

 * Participate and lead technical meetings with team members and program personnel representing the organization in functional area matters.

 * Responsible for provisioning, installation/configuration, operation, and maintenance of systems hardware and software related to a Linux/Windows infrastructure for classified programs. Duties include, but are not limited to, server management (software and hardware); storage management (logical and physical); cross platform authentication and access management; data backup and restoration; software and license configuration; and workstation support

 * Systems are operational 24x7 and occasionally require work effort beyond standard work hours

 * Full-time 100% Onsite position