Principal Windows System Administrator

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

Benefits offered by this job

Medical, dental, vision

401(k) match

Paid time off

Flexible spending accounts

Job summary

RTX in El Segundo, CA seeks an experienced IT Infrastructure professional to manage Windows Enterprise environments, security hardening, and capacity planning. The role collaborates with program management, security, and vendors to design and implement new IT infrastructure solutions, with a focus on compliance and threat response.

Candidates must hold a DoD Secret clearance and be eligible for U.S. citizenship.

Qualifications

• Typically requires a University degree or equivalent experience plus 5 years of relevant IT security or infrastructure work.
• Active and transferable U.S. government Secret clearance is required prior to start date.
• Experience administering AD, Exchange, WSUS, and server virtualization (Hyper-V/VMware).
• Must obtain DoD 8140/8570 certification (Security+ CE or equivalent) within 6 months.

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 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

Hyper-V

VMware

Security+ CE

DoD 8140/8570

Education

University degree or equivalent

Tools

Ivanti

Splunk

Tenable

SEP

HPE MSA

NetApp

VMware vCenter

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 1At 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 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.

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attendselect 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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