Senior System Administrator

RTX; McKinney (AR); On-site; USD 69,000 - 131,000; Full time

Benefits offered by this job

Medical benefits

Dental benefits

401(k) match

Paid time off

Job summary

RTX in McKinney, TX is seeking an IT Systems Administrator for an onsite role supporting DoD programs. The position requires active Secret clearance and experience with Red Hat Linux, Windows, VMware, and security compliance responsibilities.

The role involves provisioning, installation, operation, and maintenance of mixed Linux/Windows infrastructure, collaboration with Cyber Security and Network teams, and ensuring 24x7 readiness with occasional after-hours work.

Qualifications

• Requires university degree or equivalent plus 2 years of experience.
• Active, transferable Secret clearance required before start date.
• Experience with Red Hat Linux, AD, VMware, and backup/recovery suites.

Responsibilities

• Provide IT systems administration across RedHat and Windows environments.
• Participate in software installation, testing, documentation, and acceptance.
• Collaborate with System Admins, Cyber Security, Network Engineering and Stakeholders.
• Manage Windows/Linux server internals, DNS, DHCP, AD, and replication.
• Provision, install, operate, and maintain Linux/Windows infrastructure for classified programs.

Skills

Red Hat Enterprise Linux

Active Directory

VMware

PowerShell

Bash

Education

University degree or equivalent

Tools

WSUS

SCCM

NetBackup

BackupExec

VMware vCenter/vSphere

Splunk

ESX

Job description

Date posted: 2026-08-14

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

What You Will Do

• Provide IT systems administration in a heterogeneous RedHat Enterprise/Microsoft Windows and environment.
• Participate in all phases of Engineering software installation and support, with emphasis on testing, documentation, and acceptance phases.
• Collaborate with System Admins, Cyber Security professionals, Network Engineering and Program Stakeholders.
• Apply understanding and knowledge of Windows Server internals or Linux fundamentals to include DNS, DHCP, AD, and server replication methods.
• Work 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).
• 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.
• Work with Cybersecurity professionals to maintain security requirements and provide documentation on advanced IT processes and procedures and other tasks as assigned.
• 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.
• Systems are operational 24x7 and occasionally require work effort beyond standard work hours
• Full time 100% Onsite position

Qualifications You Must Have

• Typically requires a University degree or equivalent experience and a minimum of 2 years of prior relevant experience, or an Advanced Degree in a related field.
• 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 with some of, but not limited to, the following technologies: Red Hat Enterprise Linux, Active Directory, WSUS, VMware, BackupExec, NetBackup, prior systems administration experience, Windows or Linux administration, Backup and Recovery enterprise suites.
• Experience with Server architectures and/or troubleshooting methods and ability to assist in developing solutions and documentation to a variety of technical problems.
• Experience with VMWare vCenter, vSphere, Linux Desktops, Windows desktops (Windows 10, 11), Splunk and ESX and/or other virtual computing methods.
• Scripting/ automation PowerShell, Bash experience.

Qualifications We Prefer

• Active and transferable U.S. government issued Top Secret security clearance. U.S. citizenship is required, as only U.S. citizens are eligible for a security 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.
• Experience in RedHat Enterprise Linux.
• Experience with data storage, NAS, and SAN technologies and solutions.
• Experience supporting engineers in software, simulations, and hardware development.
• Experience with Microsoft WSUS, SCCM, and/or Exchange
• Experience using VMWare vCenter, vSphere, and ESX and/or other virtual computing methods.
• High Performance Computing (HPC) experience in a Linux environment.

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.

Benefits

• 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.
• 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.

The salary range for this role is 68,900 USD - 131,100 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.

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.