Principal Linux & Windows Administrator- Must have a TS/SCI active clearance

Prattwhitney; El Segundo (CA); On-site; USD 96,000 - 182,000; Full time

Benefits offered by this job

Medical

Dental

Vision

Life insurance

401(k) match

Flex spending accounts

Flexible work schedules

Employee assistance program

Paid time off

Job summary

RTX in El Segundo, CA is seeking a Principal Linux & Windows System Administrator to support classified programs. You will administer Windows and Red Hat environments, work with Cybersecurity to ensure security compliance, and document complex IT processes.

A DoDD 8140/8570 compliant certification pathway (Security+) is required or expected. The role is on-site with relocation considerations and a comprehensive benefits package, including health and retirement offerings, aligned to business

Qualifications

• Typically requires a bachelor’s degree and minimum of 5 years of prior relevant experience or a master’s degree and minimum of 3 years of prior relevant experience
• Must have an active and transferable U.S. government issued TS/SCI clearance prior to start date.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Experience systems administration in a heterogeneous Microsoft Windows and RedHatEnterpriseLinuxenvironment.
• Experience with RHEL Server setup, RHEL system security management, perform data backup and restore.
• Experience Windows Desktop Operating System (OS) and Windows Server OS
• Experience with Net App

Responsibilities

• Provide IT systems administration in a heterogeneous Microsoft Windows and Redhat Enterprise Linux environment.
• Collaborate with Cybersecurity professionals to maintain security requirements and provide documentation and training on advanced IT processes and procedures.
• Develop solutions and documentation about a variety of technical problems.
• Participate in team collaboration and manage virtualized environments

Skills

Windows OS administration

Red Hat Linux

VMware ESXi

Active Directory

Ansible automation

Security+

Education

Bachelor’s degree

Master’s degree

Tools

NetApp

Job description

Date Posted: 2026-09-03 Country: United States of America Location: US-CA-EL SEGUNDO-E01 ~ 2000 E El Segundo Blvd ~ BLDG E01 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: TS/SCI - Current Security Clearance Status: Active and existing security clearance required on day 1 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 freedom and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense. Principal Linux & Windows System Administrators, based in El Segundo, CA, 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

Provide IT systems administration in a heterogeneous Microsoft Windows and Redhat Enterprise Linux environment. Collaborate in a fast-paced environment, using troubleshooting skills to resolve complex technical issues, including hardware and OS integration, while adapting to evolving challenges as part of a team. Working with Cybersecurity professionals to maintain security requirements and provide documentation and training on advanced IT processes and procedures and other tasks as assigned. Develop solutions and documentation about a variety of technical problems. Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ or equivalent certification) Participate in team collaboration, Manage virtualized environments Full-time 100% Onsite position

Qualifications You Must Have

• Typically requires a bachelor’s degree and minimum of 5 years of prior relevant experience or a master’s degree and minimum of 3 years of prior relevant experience
• Must have an active and transferable U.S. government issued TS/SCI clearance prior to start date.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Experience systems administration in a heterogeneous Microsoft Windows and RedHatEnterpriseLinuxenvironment.
• Experience with RHEL Server setup, RHEL system security management, perform data backup and restore.
• Experience Windows Desktop Operating System (OS) and Windows Server OS
• Experience with Net App

We Prefer

• Experience with data storage, NAS, and SAN technologies and solutions.
• Familiarity with Ansible and system automation
• Experience with Linux and Windows Operating Systems.
• Experience with VMware administration including ESXi hypervisors and VSphere management interface.
• Microsoft Windows Active Directory Services administration and support (e.g. user and computer objects administration, Group Policy).
• Experience with supporting desktop / workstation hardware.
• Experience with backup technologies such as tape libraries and backup software (NetBackup or the like).
• Experience with an IT incident/service request system.

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

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 95,500 USD - 181,700 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.

• 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
• 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:

RTX 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, Pratt & Whitney, and Raytheon. Its 195,000 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, Virginia.