Sr. Principal Linux System Administrators (SME)

Job description

**Date Posted:**

2025-10-01
**Country:**

United States of America
**Location:**

AZ848: RMS AP Bldg 848 1151 East Hermans Road Building 848, Tucson, AZ, 85756 USA
**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:**

Secret - Current

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.

Our **Digital Technology (DT** ) organization ensures that Raytheon teammates across the globe can 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.

**Sr. Principal Linux System Administrators (SME),** internally known as Principal Analyst, infrastructure Workplace Services, collaborate with many teams 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** :

+ Serve as a Linux / Red Hat Enterprise Linux (RHEL) designing, implementing, troubleshooting, and maintaining physical and virtual Linux servers across a large-scale enterprise network.

This includes system hardening, patching, automation with Ansible, provisioning with Kickstart, access control management, lifecycle management with Red Hat Satellite, virtualization with KVM, containerization with Podman or Docker, and hybrid cloud integrations with OpenShift and Kubernetes.
+ Collaborate with engineers, software developers, systems administrators, storage, networking, and high-performance computing teams to resolve complex infrastructure and integration challenges.
+ Partner with cybersecurity teams to ensure continuous compliance with regulatory and security frameworks such as DFARS, RMF, and the NIST Cybersecurity Framework.
+ Provide critical, on-site support for mission systems in a closed DoD area, responding to both planned and emergent tasks, with occasional work outside standard hours and up to 10% travel as required.
+ Obtain and maintain DoD 8140 / 8570 certification (e.g., CompTIA Security+ or equivalent) within six months of hire.
+ Must have a interim clearance to set a start date

**Qualifications You Must Have:**

+ Typically requires a bachelor's degree and a minimum of 8 years of prior relevant experience, or an advanced degree and 5 years of direct experience.
+ Active and transferable U.S. government issued secret security clearance is required prior to start date.

U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
+ Experience with Red Hat Enterprise Linux (RHEL), including system installation, administration, patching, and troubleshooting in enterprise environments.
+ Experience with virtualization technologies such as VMWare, ESXi, or similar platforms.
+ Experience with secure system configurations, system hardening, application settings, and tailoring Linux environments

**Qualifications We Prefer:**

+ Strong leadership, teamwork, communication (written and oral), collaboration, and organizational skills.
+ Deep experience with Red Hat Enterprise Linux (RHEL) and its ecosystem, including authentication and identity services (SSSD, LDAP, Kerberos, NIS) and file sharing/integration services (Samba, NFS).
+ Expertise with automation and configuration management tools such as Ansible and Red Hat Satellite, along with strong scripting skills in Bash, Python, Perl, or C to support provisioning, patching, and lifecycle management.
+ Hands-on experience with virtualization and containerization technologies, including VMware vCenter, vSphere, Horizon, ESXi, KVM, Podman, Docker, and Kubernetes/OpenShift.
+ Familiarity with enterprise storage systems (e.g., NetApp) and virtual desktop infrastructure (VDI) technologies such as Horizon, Profile Unity, and NVIDIA GPU virtualization (NLS, DLS).
+ Proficiency with monitoring, vulnerability scanning, and compliance assessment tools (ACAS, Splunk, Nessus, SCAP, STIG, Nagios, SolarWinds) and working knowledge of security frameworks (CMMC, NISPOM, JAFAN, JSIG, DFARS, DoD RMF).

**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.

**Relocation Eligibility**

RTX Corporation is an Aerospace and Defense company that provides advanced systems and services for commercial, military and government customers worldwide.

It comprises three industry-leading businesses – Collins Aerospace Systems, Pratt & Whitney, and Raytheon.

Its 185,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity.

The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, VA.

The salary range for this role is 101,000 USD - 203,000 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 (http://www.rtx.com/privacy/Job-Applicant-Privacy-Notice) to read the Policy and Terms
Raytheon Technologies is An Equal Opportunity/Affirmative Action Employer.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status, age or any other federally protected class.

Required Skill Profession

Other General