Principal System Administrator

Raytheon; McKinney (TX); On-site; USD 86,800 - 165,200; Full time

Benefits offered by this job

Healthcare benefits

Flexible work schedules

Educational assistance

Job summary

A leading defense contractor in McKinney, TX, is seeking a Principal System Administrator to manage IT systems in a mixed environment. Candidates should have extensive experience with Windows and Linux systems, along with a transferable U.S. government secret clearance. Responsibilities include system administration, cybersecurity collaboration, and ensuring operational continuity. The role requires a Bachelor's degree and at least 5 years of relevant experience. A comprehensive benefits package is offered, including a competitive salary range of $86,800 - $165,200.

Qualifications

• 5+ years of direct system experience or 3 years with a Master's degree.
• Must have a transferable U.S. government issued secret clearance.
• Experience in virtual computing methods.

Responsibilities

• Provide IT systems administration in a mixed environment.
• Work with Cybersecurity professionals.
• Maintain operational systems 24x7.

Skills

Windows experience

Linux experience

Active Directory

Networking administration

VMware

Troubleshooting techniques

Education

Bachelor's degree

Master's degree

Tools

Microsoft Windows Server

Redhat Enterprise Linux

VMware vCenter

SCCM

Exchange

Job description

Join to apply for the Principal System Administrator role at Raytheon.

Location: TX190: 2501 West University, McKinney, TX, 75070 USA

Date Posted: 2026-01-08

What You Will Do

• Provide IT systems administration in a heterogeneous Microsoft Windows and Redhat Enterprise Linux environment.
• Understand and knowledge of Windows Server internals or Linux fundamentals including DNS, DHCP, AD, and server replication methods.
• Work as a team member in a fast‑paced technological environment, using troubleshooting techniques to resolve technical problems of moderate to high scope and complexity, including integration of hardware and OS.
• Understand data RAID, backup uses and technologies. Install and configure software applications requested by end users.
• Work with Cybersecurity professionals to maintain security requirements and provide documentation and training on advanced IT processes and procedures.
• Obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) within 6 months of start date.
• Systems are operational 24x7 and occasionally require work effort beyond standard work hours.
• Travel up to 10%.
• 100% onsite in McKinney, TX location.

Qualifications You Must Have

• Typically requires bachelor’s degree and 5+ years of direct system experience, or master’s degree and 3 years of directly related experience.
• Must have a transferable U.S. government issued secret clearance prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Must have Windows and Linux experience.
• Experience in one of the following: Active Directory, VMware, networking administration experience.

Qualifications We Prefer

• An active DoD Secret clearance.
• Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification and an Operating System Certification).
• Direct working experience with NISPOM, JAFAN, JSIG, DFARS and/or DoD/RMF.
• In-depth working experience in Windows Server.
• Experience with data storage, NAS, and SAN technologies and solutions.
• Experience with using IT project lifecycle management processes.
• Experience using VMWare vCenter, vSphere, ESX and/or other virtual computing methods.
• Experience supporting engineers in software, simulations, and hardware development.
• Experience with Microsoft WSUS, SCCM, and/or Exchange.
• High Performance Computing (HPC) experience in a Linux environment.
• Scripting experience.

Relocation eligible.

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.

Whether you’re just starting or are an experienced professional, we offer a robust total rewards package with compensation; healthcare, wellness, retirement and work/life benefits; career development and recognition programs. Some benefits include parental (including paternal) leave, flexible work schedules, achievement awards, educational assistance and child/adult backup care.

The salary range for this role is $86,800 - $165,200 USD. The range is a good faith estimate representative of all experience levels.

Hired applicants may be eligible for benefits including 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 and 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.

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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