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# Senior System Administrator Clearance (ONSITE)

- **Company:** RTX
- **Location:** Tucson, AZ, United States
- **Experience:** Expert
- **Salary:** $68,900.0 - $131,100.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Active Directory, Cyber Security, System Configuration, Dynamic Host Configuration Protocol, Linux, Domain Name System (DNS), VMware ESX Servers, Red Hat Enterprise Linux, Security Content Automation Protocol, VMware Virtualization, Software Vulnerability Management, Vcenter, Windows Services, Splunk
- **Published:** November 6, 2026
- **Apply:** https://dejobs.org/x/x/C81ECD215F774FFB941552E78776978B/job/

## About the Role

* Typically requires a University Degree or equivalent experience and minimum 2 years of prior relevant experience.
 * Experience with Windows and Linux Operating systems.
 * Experience with helpdesk operations, ticket troubleshooting and resolution.
 * Experience with working in a team environment and collaborating with others.
 * 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

Qualifications We Prefer

 * Experience serving as a technical SME or primary point of contact for patching, vulnerability remediation, or compliance initiatives.
 * Experience with VMware virtualization technologies, including ESXi, vCenter, VM lifecycle management, and host upgrades.
 * Experience with securing system configurations, system hardening, STIG/EVAL STIG implementation, vulnerability remediation, and compliance. Familiarity with cybersecurity and compliance tooling, such as SCAP, Splunk, STIG Viewer, and audit support processes.
 * Experience with enterprise Windows services, including Active Directory, Group Policy, and identity integration.
 * Experience working in a classified environment.

## Description

* Provide IT systems administration in a heterogeneous Microsoft Windows and Redhat Enterprise Linux environment.
 * 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).
 * Work with Cybersecurity professionals to maintain security requirements.
 * Provide documentation and training on advanced IT processes and procedures and other tasks as assigned.
 * This role is 100% ONSITE