Principal System Administrator Windows or Linux

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

Benefits offered by this job

Medical, dental, vision insurance

401(k) match

Paid time off

Flexible spending accounts

Job summary

RTX is seeking an IT Systems Administrator in El Segundo, onsite, to manage Windows and Linux environments and container deployments. You will implement automation, support ESXi/vCenter, and collaborate with Cybersecurity to uphold security requirements.

Must hold Top Secret clearance, be a U.S. citizen, and obtain DoDD 8140/8570 certification within 6 months. Travel up to 10% may be required; full-time onsite position.

Qualifications

• Active and transferable U.S. government issued Top Secret clearance required before start.
• U.S. citizenship required for eligibility for security clearance.
• Experience with Windows and/or Linux operating systems.
• Typically a university degree or equivalent with 5+ years experience (3+ years with advanced degree).

Responsibilities

• Provide IT systems administration for Windows and Red Hat Enterprise Linux.
• Design, develop and deploy containers and automation tooling.
• Manage ESXi, vCenter and Windows domains.
• Collaborate with Cybersecurity to meet security requirements.
• Travel up to 10% domestically; on-site, 100% onsite role.
• Support installation, testing, documentation and handoff with engineering teams.

Skills

Windows

Linux

Containers

Automation

Networking

Security

Education

University degree or equivalent experience

Advanced degree (optional)

Tools

Ansible

Active Directory

VMware ESXi

DNS/DHCP

DoD 8570/8140

Job description

Date Posted: 2026-06-15

Country: United States of America

Location: US-CA-EL SEGUNDO-E04 ~ 2006 E El Segundo Blvd ~ BLDG E04

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: Top Secret - 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 freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

What You Will Do:

• Provide IT systems administration in a heterogeneous Microsoft Windows and RedHatEnterpriseLinuxenvironment.
• Experience with troubleshooting techniques to resolve technical problems of moderate to high scope and complexity to include the integration of hardware and operating systems.
• Execute actions as directed by senior staff and project management.
• Engage in cross-team collaboration and align with expectations of leadership team.
• Design, develop and deploy containers.
• Participate in all phases of Engineering software installation and support, with emphasis on testing, documentation, and acceptance phases
• Manage ESXi, VCenter and Microsoft Windows domains
• Experience with Windows Server internals or Linux fundamentals to include DNS, DHCP, AD, and server replication methods.
• Experience with hardware RAID, hardware and software encryption and server management tools.
• Perform data backup and restore, using industry best practice.
• Install and configure software applications requested by end users.
• Work with Cybersecurity professionals to maintain security requirements.
• Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) within 6 months of start date.
• Systems are operational 24x7 and occasionally require work effort beyond standard work hours.
• Travelrequiredas businessneedsdictate to other US Domestic locations, up to 10% per year.
• Full time 100% Onsite position.

Qualifications You Must Have:

• Typically requires a University degree or equivalent experience and a minimum of 5 years of prior relevant experience or an Advanced Degree in a related field and minimum 3 years experience.
• Active and transferable U.S. government issued Top 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 Windows and/or Linux.

Qualifications We Prefer:

• Experience Deploying Windows workstations and migrating end-user data.
• Experience with cloning techniques.
• Use and guide use of automation tools e.g. Ansible.
• Experience with operating system concepts and implementations.
• Microsoft Windows Active Directory Services administration and support (e.g. user and computer objects administration, Group Policy).
• Experience with network services related to Microsoft Windows environment (e.g. DC, DNS, DHCP, etc.).
• Experience with supporting desktop / workstation hardware.
• Experience with an IT incident/service request system.

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.

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. 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.

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