Fulltime Linux Windows System Administrator Jobs in California

Date Posted:

2026-09-03

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:

DoD Clearance: Secret

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.

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. 

Raytheon has an available position for an experienced Windows System Administrator who will work in a highly collaborative, multi-platform and multi–disciplined environment. The System Administrator must possess a secret security clearance as they will be responsible for administering systems that contain classified data.

The candidate is responsible for provisioning, installation/configuration, operation, and maintenance of systems hardware and software related to 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.

What You Will Do:

• Manage hardware and software by analyzing, diagnosing, and troubleshooting technical issues in a Microsoft and Red Hat Enterprise Linux environment.

• Partner with Cybersecurity Specialists to update and maintain security standards, including recurring hardware and software security updates.

• Administer system backups, diagnose and remediate technical issues.

• Collaborate, align, and execute cross-team projects and activities as directed.

• Provide timely technical assistance to users and excellent customer care.

• Configure new systems including hardening security settings and testing.

• Apply best practices to manage physical and virtual servers, storage, and backups.

• Identify, analyze and remediate technical challenges

• This is a Full-Time and 100% Onsite position, with periodic work effort that extends beyond standard work hours.

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 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 supporting Microsoft Windows and/or Linux desktops; including working knowledge deploying workstation hardware, software, system hardening, testing, and migrating end-user data.

• Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification (CompTIA Security+ CE or equivalent certification) within 6 months of start date.

Qualifications We Prefer:

• Experience with configuring, deploying, managing, and supporting workstation hardware and software, including cloning and hardening techniques.

• Experience with installing, updating, and managing security tools and dashboards.

• Experience with patch management software and adhere to compliance standards.

• Experience with Windows command line and related utilities.

• Working knowledge of servers, backup systems, and storage platforms.

• Experience building, configuring and deploying physical and virtual servers.

• Automation experience such as Ansible and scripting.

• Microsoft Windows Active Directory Services administration and support (e.g. user and computer object administration, Group Policy).

• Experience with network services as related to the Microsoft Windows environment (e.g. DC, DNS, DHCP, etc.).

• Experience with IT incident/service desk request systems.

• Experience plannin and executing tasks independently, and across teams.

• Current Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification and an Operating System Certification).

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.

Learn More & Apply Now!

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 75,800 USD - 144,200 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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