Principal Windows System Administrator

Raytheon; El Segundo (CA); On-site; USD 95,000 - 130,000; Full time

Job summary

Raytheon is seeking a Windows System Administrator in an onsite role in El Segundo, CA to manage Windows Enterprise environments and ensure secure, compliant operations handling classified data. The role requires active DoD Secret clearance and citizenship.

The ideal candidate will deploy, monitor, and harden systems, collaborate with cross-functional teams, and drive infrastructure improvements while maintaining documentation and readiness for capacity planning and project execution.

Qualifications

• 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 administering one or more of the following: Active Directory, Exchange, WSUS, Server Virtualization (Hyper-V, VMware), Group Policy, or backup and Recovery.
• 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.

Responsibilities

• Manage Windows Enterprise environments including system management, performance monitoring, process automation, security hardening, and technical troubleshooting.
• Maintain compliance standards, monitor security systems, and proactively respond to threats using enterprise security tools such as Ivanti, Splunk, Tenable, and SEP.
• Apply Business Continuity principles, including working knowledge of enterprise backup hardware and software platforms, data backups and system recovery.
• Collaborate with program management, application, security, vendor, and executive stakeholders to plan, design, and implement new IT infrastructure solutions.
• Conduct short-term and long-term capacity planning for technology modernization.
• Plan and execute small to medium sized projects.
• Create, update, and maintain IT documents and technical artifacts.

Skills

Active Directory

Exchange

WSUS

Group Policy

Backup & Recovery

Security Hardening

Education

University degree or equivalent experience

Advanced degree in related field

Tools

Hyper-V

VMware

vCenter

vSphere

ESXi

VDI

Microsoft Hypervisor

Ivanti

Splunk

Tenable

Nessus

Job description

Date Posted:
2026-08-05
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.
What You Will Do:

• Manage Windows Enterprise environments including system management, performance monitoring, process automation, security hardening, and technical troubleshooting.
• Maintain compliance standards, monitor security systems, and proactively respond to threats using enterprise security tools such as Ivanti, Splunk, Tenable, and SEP.
• Apply Business Continuity principles, including working knowledge of enterprise backup hardware and software platforms, data backups and system recovery.
• Collaborate with program management, application, security, vendor, and executive stakeholders to plan, design, and implement new IT infrastructure solutions.
• Conduct short-term and long-term capacity planning for technology modernization.
• Plan and execute small to medium sized projects.
• Create, update, and maintain IT documents and technical artifacts.

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 administering one or more of the following: Active Directory, Exchange, WSUS, Server Virtualization (Hyper-V, VMware), Group Policy, or backup and Recovery.
• 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.

Qualifications We Prefer:

• Implementing and enforcing information security compliance standards and policies.
• Experience managing large Storage environments (HPE MSA or NetApp).
• Experience with Ivanti, Symantec, Splunk, Tenable and Nessus products.
• Experience working with NISPOM, DFARS, JSIG, RMF, handling classified information, and working with compliance teams.
• Experience managing core network and infrastructure like domain controllers, global catalogs, DNS, and DHCP.
• Experience in patch management, vulnerability remediation, operating system upgrades, computer security, system monitoring and logging.
• Managing environments with multi-server, multi-tenant, and large storage footprints.
• Experience working with geographically dispersed teams.
• Experience using VMWare vCenter, vSphere, ESXi, Virtual Desktop Infrastructure (VDI), and Microsoft Hypervisor.
• Automation and task orchestration through scripting and off-the-shelf tools experience.

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.

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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