> Markdown version of [/jobs/ext/1625665-principal-systems-administrator-must-have-a-active-secret-clearance](https://www.wearedevelopers.com/jobs/ext/1625665-principal-systems-administrator-must-have-a-active-secret-clearance). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Systems Administrator- Must have a active secret clearance - **Company:** RTX - **Location:** Tucson, AZ, United States - **Experience:** Expert - **Salary:** $86,800.0 - $165,200.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Backup Devices, CompTIA Security+, Cyber Security, System Configuration, Dynamic Host Configuration Protocol, Linux, RAID, Domain Name System (DNS), VMware ESX Servers, Hardware Design, Identity and Access Management, Windows Servers, MySQL, Red Hat Enterprise Linux, VMware VSphere, Scripting, Data Storage Management, Data Storage Technologies, High Performance Computing, Virtual Computing, Information Technology, Vcenter, Hardware Infrastructure, National Industrial Security Program Operating Manual (NISPOM), Wsus, Vmware - **Published:** July 2, 2026 - **Apply:** https://www.careerjet.com/job/us141117c0eddf376bd29f9576491b399f/eaa ## About the Role * Typically requires a bachelor's degree and minimum of 5 years of prior relevant experience or a master's degree and minimum of 3 years of prior relevant experience * Must have a active 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 Linux and Windows experience * Experience in one of the following: Active Directory, VMware, MySQL, networking administration experience. Qualifications We Prefer: * 5 years of full time Linux experience highly desired! * An active DoD TS * Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification and an Operating System Certification) * 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 Information Technology project lifecycle management processes. * Experience using VMWare vCenter, vSphere, and ESX and/or other virtual computing methods. * Experience supporting engineers in software, simulations, and hardware development. * Experience with Microsoft WSUS, SMECP, and/or Exchange * High Performance Computing (HPC) experience in a Linux environment * Scripting Experience ## Description Principal System Administrators, based in Tucson, AZ, infrastructure Workplace Services, collaborate with many teams to support exciting, critical programs with classified information system capabilities. Success in this role means you can develop, implement and maintain secure, cost-efficient environments across various classified programs. Program teams rely on your collaboration and guidance to define computing requirements and create end-to-end solutions to solve complex IT infrastructure problems. What You Will Do: * Provide IT systems administration in a heterogeneous Microsoft Windows and Redhat Enterprise Linux environment. * Lead and coordinate the Red Hat Installation and configuration. * 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 * Understanding and knowledge of Windows Server internals or Linux fundamentals to include DNS, DHCP, AD, and server replication methods. * 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). * Understanding data RAID, data 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 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) . * Must be able to develop solutions and documentation to deal with a variety of technical problems. * Systems are operational 24x7 and occasionally require work effort beyond standard work hours. * Travel required up to 5% * Full time 100% Onsite position, 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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