Unix Linux System Engineer Jobs in Frisco, TX (NOW HIRING)

Date Posted:

2026-07-01

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

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.

What is YOUR Mission?
Empowering a global business. Providing affordable solutions. Delivering competitive discriminators by unleashing deep expertise. These are just some of the many ways the Digital Technology team at Raytheon creates success for our customers. Joining our team will allow you to collaborate with RTX organizations to enable business growth, speed, and agility through business innovation, technical proficiency, and operational excellence.
 
Our Digital Technology (DT) organization ensures that Raytheon teammates across the globe are able to communicate, collaborate and innovate for customer success. We create leading-edge technology solutions to prevent security threats, protect the integrity of our systems and support RTX’s  infrastructure around the world.
 

Job Summary:
Raytheon has an exciting IT position available that supports the Raytheon mission of making the world a safer place.  We are currently seeking a Principal Systems Administrator, based in McKinney, TX 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: RedHat Linux 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, strategizing disaster recovery, updating virus definitions and security patches, teaming with our brilliant engineers on how to improve their processes, and more.
Responsibilities to Anticipate:

• You will provide System Administration in a heterogeneous Windows & RedHat Enterprise Linux environment.
• Advanced understanding and knowledge of Windows infrastructure services and Linux distributions to include DNS, File sharing protocols, DHCP, AD integration via LDAP, file system structures and permissions.
• Working as a team member in a fast-paced technological environment.  Use troubleshooting techniques to resolve technical problems of a moderate to high scope and complexity to include the integration of hardware and operating systems (OS).
• Data backup uses and technologies.
• Install and configure software applications requested by end users.
• Work with Cybersecurity professionals to maintain security requirements.
• Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) or be able to be certified within 6 months of hire date
• Full time 100% onsite position

Qualifications You Must Have:

• Typically requires a bachelor’s degree and 5 years of experience, or master’s degree and 5 years of prior relevant experience.
• Must have an active and in-scope US DoD secret clearance. US citizenship is required as only US citizens are eligible for security clearance
• Must have Linux experience
• Experience in one of the following: Active Directory, VMware, system hardening, disaster recovery

Qualifications We Value: 

• Experience with NISPOM, JAFAN, JSIG, DFARS and/or DoD/RMF
• Familiarity with High Performance Computing (HPC) Environments
• Experience with Enterprise Active Directory (AD) & LDAP
• Experience with security posturing using tools like SCAP, Nessus, Splunk, Symantec and other AV solutions, and system hardening.
• Experience supporting engineers in software, simulations, and hardware development.
• Able to real-time troubleshoot and develop solutions with documentation to a variety of technical problems.

We are offering relocation!

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.

Learn More & Apply Now!

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select 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 86,800 USD - 165,200 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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