Sr. Principal Systems Administrator, WINDOWS (ONSITE)

Prattwhitney; McKinney (TX); On-site; USD 108,000 - 205,000; Full time

Benefits offered by this job

Relocation assistance

Medical/dental/vision

401(k) match

Flexible schedules

Employee Scholar Program

Job summary

RTX in McKinney, TX is seeking a Systems Administrator to manage classified IT infrastructure in a high‑assurance environment. The role demands onsite work, VMware and Windows proficiency, and active clearance on day one.

You will install, configure, and maintain servers, storage, and access controls to support engineers and programs. The position requires DoD certification readiness and a university degree (or equivalent) with 5–8 years’ related experience.

Qualifications

• Must have experience using VMware vCenter, vSphere, and Windows desktops (Win 10/11).
• Must be a U.S. Citizen with active Secret clearance on day 1.
• Must be able to obtain DoDD 8140/8570 certification (Security+ CE or equivalent).
• Typically requires a university degree or equivalent experience with 5–8 years in a related field.

Responsibilities

• Provide IT systems administration in a heterogeneous RedHat/Microsoft Windows environment.
• Lead and coordinate infrastructure installation and configuration.
• Mentor junior admins and participate in technical meetings.
• Maintain systems 24x7 and support classified programs.

Skills

VMware vCenter

VMware vSphere

Windows 10/11

DoDD 8140 / 8570 readiness

Active Secret clearance

Education

Bachelor's degree or equivalent experience

Tools

ESXi

Linux & Windows administration

Storage (NAS/SAN)

Job description

Date Posted: 2026-10-29 Country: United States of America Location: US-TX-MCKINNEY-513WC ~ 2501 W University Dr ~ WING C BLDG 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: Secret - Current Security Clearance Status: Active and existing security clearance required on day 1

Role Overview

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. Raytheon currently has an exciting IT position available that supports the Raytheon mission of making the world a safer place. We are currently seeking a Systems Administrator that will be working onsite in a highly collaborative, multi‑platform and multi‑disciplined environment. The Systems Administrator is required to have an active secret security clearance as they will be responsible for deploying and maintaining classified IT infrastructures. The candidate’s day‑to‑day activities include but are not limited to: Server management; storage management; file server management; access management; data backup; software and license configuration; and workstation support. Each day in the life of a Systems Administrator can bring something new – building a new IT infrastructure for a group of engineers, restoring files due to an outage, updating virus definitions and security patches, teaming with our brilliant engineers on how to improve their processes, and more.

What You Will Do

Provide IT systems administration in a heterogeneous RedHat Enterprise/Microsoft Windows and environment. Lead and coordinate infrastructure installation and configuration. Collaborate with teams and mentor junior admins. Work as a team member in a fast‑paced technological environment. Use troubleshooting techniques to resolve technical problems of moderate to high scope and complexity to include the integration of hardware and operating systems (OS). Participate and lead technical meetings with team members and program personnel representing the organization in functional area matters. Responsible for provisioning, installation/configuration, operation, and maintenance of systems hardware and software related to a Linux/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. Systems are operational 24x7 and occasionally require work effort beyond standard work hours

Qualifications

Full‑time 100% Onsite position

• You Must Have Experience using VMWare vCenter, vSphere, Windows desktops (Windows 10, 11), and ESXi and/or other virtual computing methods.
• U.S. Citizen - Active and transferable U.S. government issued Secret security clearance is required on day 1.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) within a reasonable amount of time.
• Typically, requires a University Degree or equivalent experience and minimum 8 years prior relevant experience, or an Advance Degree in a related field and minimum 5 years experience.

We Prefer

• Active DoD T/S clearance, or the ability to obtain one Direct working experience with NISPOM, JAFAN, JSIG, DFARS and/or DoD/RMF In‑depth working experience with Windows domains Experience with data storage, NAS, and SAN technologies and solutions Scripting 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: Safety, Trust, Respect, Accountability, Collaboration, and Innovation. Relocation assistance is available, provided final candidate meets eligibility requirements.

• The salary range for this role is 107,500 USD - 204,500 USD.
• 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.
• 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.

Location

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 is a U.S.-based role.

Company

RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry‑leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.