Full-Time

Principal System Administrator

Updated on 8/24/2026

RTX

RTX

10,001+ employees

Defense and commercial aerospace conglomerate

Compensation Overview

$86.8k - $165.2k/yr

+ Annual incentive compensation

No H1B Sponsorship

Tucson, AZ, USA

In Person

Travel to other U.S. domestic locations may be required, up to 10% per year. This is a 100% onsite position.

US Citizenship, US Top Secret Clearance Required

Bachelor's

Category
IT & Security (1)
Required Skills
Kubernetes
Microsoft Azure
OpenShift
High Performance Computing (HPC)
LDAP
CompTIA Security+
Microsoft Windows
Computer Networking
Operating Systems
Docker
Cybersecurity
Cryptography
Jenkins
VMWare
Linux/Unix

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Requirements
  • A university degree and at least 5 years of relevant experience, or an advanced degree in a related field and at least 3 years of experience.
  • Ability to obtain and maintain an active U.S. government-issued Secret security clearance before the start date; U.S. citizenship is required.
  • Experience with Linux or Windows.
  • Experience with Active Directory, VMware, or networking administration.
Responsibilities
  • Provide information technology systems administration in a heterogeneous Microsoft Windows environment supporting information systems.
  • Troubleshoot and resolve technical problems of basic to moderate scope and complexity, including integration of hardware and operating systems.
  • Manage virtualized environments.
  • Administer Windows Server internals, including DNS, DHCP, Active Directory, and server replication methods.
  • Manage hardware RAID, hardware and software encryption, and server management tools.
  • Perform data backup and restoration using industry best practices.
  • Install and configure software applications requested by end users.
  • Work with cybersecurity professionals to maintain security requirements.
  • Obtain DoDD 8140/8570 certification requirements, such as CompTIA Security+ CE or an equivalent certification, within six months of the start date.
  • Support systems that operate 24x7 and occasionally work beyond standard hours.
  • Travel to other U.S. domestic locations as business needs dictate, up to 10% per year.
Desired Qualifications
  • An active and transferable U.S. government-issued Secret security clearance.
  • Experience with containerization technologies such as OpenShift, Kubernetes, Docker, Tanzu, and Rancher.
  • Experience with continuous integration and continuous delivery tools such as GitLab, Jenkins, and Azure DevOps.
  • DoDD 8140/8570 certification requirements, including CompTIA Security+ CE or an equivalent certification and an operating system certification.
  • Experience with NISPOM, JAFAN, JSIG, DFARS, and/or DoD/RMF.
  • Experience with networking administration, data storage, NAS, and SAN technologies.
  • Experience using VMware vCenter, vSphere, and ESX or other virtual computing methods.
  • Experience with Microsoft WSUS, MECM, and/or Exchange.
  • High Performance Computing experience in a Linux environment.

RTX is a large aerospace and defense company formed by the 2020 merger of Raytheon Technologies and United Technologies’ aerospace businesses. It develops and delivers defense systems, advanced radar, missiles, and cybersecurity solutions, as well as commercial aircraft engines, avionics, and related aerospace technologies. Its products combine sensors, weapons, propulsion, and software to enable both military and civilian aviation. RTX differentiates itself through scale and a diversified portfolio that spans high-end defense capabilities and broad commercial aerospace, offering end-to-end systems from engines to electronic systems and software. The company aims to invest in future aerospace technologies such as hypersonics, artificial intelligence, and sustainable aviation, while managing a large backlog of orders and navigating global supply chains to serve both defense and commercial customers.

Company Size

10,001+

Company Stage

IPO

Headquarters

Arlington, Virginia

Founded

2022

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Simplify Jobs

Simplify's Take

What believers are saying

  • RTX raised 2026 sales guidance to $95–$96 billion after Q2 organic growth.
  • Tomahawk output rises toward 1,000 annually, with $22.9 billion Navy funding secured.
  • Commercial aftermarket sales rose 18%, boosting cash flow as engine deliveries recovered.

What critics are saying

  • Pratt & Whitney’s GTF defects grounded airline fleets and keep Airbus threatening damages.
  • Airbus seeks compensation in 2026, and ITA Airways weighs litigation over Pratt faults.
  • Powder-metal GTF repairs still cost RTX about $150 million quarterly, pressuring margins.

What makes RTX unique

  • RTX combines Pratt engines, Collins avionics, and Raytheon missiles across one platform.
  • RTX backlog reached $289 billion in Q2 2026, spanning defense and commercial demand.
  • Raytheon’s Tomahawk contract and classified awards cement RTX’s scale in munitions.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

401(k) Company Match

401(k) Retirement Plan

Flexible Work Hours

Remote Work Options

Paid Vacation

Paid Sick Leave

Paid Holidays

Parental Leave

Family Planning Benefits

Fertility Treatment Support

Adoption Assistance

Employee Assistance Plan

Wellness Program

Gym Membership

Tuition Reimbursement

Student Loan Assistance

Home Office Stipend

Phone/Internet Stipend

Short-term Disability

Long-term Disability

Employee Scholar Program

Three weeks of vacation for newly hired employees

Generous 401(k) plan that includes employer matching funds

Ovia Health, fertility, and family planning

Bright Horizons, child and elder care services

Doctor on Demand, virtual doctor visits

Teladoc Medical Experts, second opinion program

Growth & Insights and Company News

Headcount

6 month growth

7%

1 year growth

7%

2 year growth

7%
PR Newswire
Aug 17th, 2026
RTX's Raytheon wins $22.9B contract to accelerate Tomahawk missile production

Raytheon, an RTX business, has secured a seven-year, $22.9 billion contract from the US Navy to accelerate production of Tomahawk cruise missiles. The agreement, part of the Department of War's Arsenal of Freedom initiative, will support ramping annual production to over 1,000 missiles. RTX has already tripled Tomahawk deliveries in the first half of 2026 compared to the same period in 2025. The contract will enable the company to expand capacity and work with hundreds of suppliers nationwide to scale output. Tomahawk cruise missiles provide long-range strike capabilities, allowing the Navy to target hostile forces from hundreds of miles away across multiple launch platforms.

PR Newswire
Aug 10th, 2026
RTX's Raytheon demonstrates new unmanned undersea vehicle with 2,000 nautical mile range

Raytheon, an RTX business, and Composite Energy Technologies have successfully demonstrated HADALUS, a new unmanned undersea vehicle, during a US Navy exercise. The 34-foot UUV completed at-sea missions whilst submerged, marking the first time the Navy has witnessed this integrated capability in water. HADALUS features a carbon-fibre design with over 2,000 nautical miles of endurance. The vehicle costs roughly one-third to one-fifth of comparable long-endurance vehicles. The companies progressed from conceptual sketch to working prototype in under 18 months. The demonstration showcased the UUV's ability to perform detect, reacquire, and engage functions within a single mission. "By tightly coupling design, integration and at-sea experimentation, we've proven we can bring new autonomous solutions to the fleet quickly and cost-effectively," said Jen Gauthier, vice president at Raytheon.

Yahoo Finance
Aug 3rd, 2026
RTX's Raytheon installs first SPY-6(V)4 radar array at Wallops Island for US Navy destroyer upgrade

Raytheon, an RTX business, has installed the first SPY-6(V)4 radar array at the Surface Combat Systems Center at Wallops Island, Virginia. The installation marks a milestone for the US Navy's Flight IIA Destroyer modernisation programme. The land-based test facility will support radar testing and power system integration before installation on USS Pinckney (DDG 91), the first ship scheduled for the SPY-6(V)4 backfit from late 2026 to 2028. Testing will begin later this year and continue through mid-2028. SPY-6 variants are already onboard two commissioned Navy ships, with 11 additional vessels undergoing testing. Over the next decade, more than 50 Navy ships are expected to deploy SPY-6 radars. Raytheon has invested $800 million in manufacturing facilities and aims to double production by 2028.

PR Newswire
Jul 31st, 2026
RTX's Pratt & Whitney secures $1.3B contract for F135 engine spare parts

RTX's Pratt & Whitney has secured a nearly $1.3 billion contract for F135 engine spare parts. The Indefinite Delivery, Indefinite Quantity contract will fund fiscal year 2026 requirements for initial spare parts, deployable packages, depot lay-ins and support equipment for US and international F-35 customers. The F135 engine powers all three variants of the F-35 Lightning II fighter aircraft. Pratt & Whitney maintains a global sustainment network supporting 42 bases and 13 ships worldwide. The company has delivered more than 1,500 F135 production engines to customers across 20 allied nations. The upcoming F135 Engine Core Upgrade will leverage the existing sustainment network to provide enhanced capability and fleet readiness.

Yahoo Finance
Jul 31st, 2026
US Pentagon signs seven-year deals with L3Harris and Lockheed Martin to expand missile defense production

The US Defense Department announced two seven-year agreements with L3Harris Technologies and Lockheed Martin on 27 July to expand propulsion capacity for Patriot and THAAD interceptors, addressing missile defence system shortages driven by Iran tensions. RTX also benefits as a key contractor and supplier for these systems. L3Harris is up 3% this year, whilst RTX and Lockheed Martin have gained more than 17% and 19% respectively. Lockheed reported Q2 revenue of $20.1 billion, up 11% year over year, with a record backlog of $230 billion. Through its Aerojet Rocketdyne business, L3Harris supplies solid-rocket motors for THAAD and Patriot missiles, benefiting from demand regardless of contract awards.