Principal Windows System Administrator

RTX; El Segundo (CA); On-site; USD 120,000 - 170,000; Full time

Job summary

RTX seeks an experienced IT Professional to manage Windows Enterprise environments, monitor security, and support DoD clearance requirements at our El Segundo facility.

You will collaborate with multiple stakeholders to plan and implement modern IT infrastructure, ensure BC/DR readiness, and maintain comprehensive technical documentation. A DoD Secret clearance and citizenship are required.

Qualifications

• Requires university degree or equivalent experience and 5+ years of prior relevant experience or an Advanced Degree in a related field with minimum 3 years experience.
• Active and transferable U.S. government issued Secret security clearance is required prior to start date.
• Experience administering Active Directory, Exchange, WSUS, Server Virtualization, Group Policy, or backup and Recovery.
• Must obtain DoDD 8140 / 8570 Certification (CompTIA Security+ CE or equivalent) within a reasonable timeframe.

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

Security clearance

Citizenship required

Education

University degree or equivalent experience

Advanced Degree in related field

Tools

Active Directory

Exchange

WSUS

Hyper-V

VMware

Group Policy

Backup and Recovery

Job description

Date Posted

2026-10-01

Country

United States of America

Location

US-CA-EL SEGUNDO-R01 ~ 2000 E Imperial Hwy ~ BLDG R01

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 freedom and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

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