Sr.PrincipalSystemAdministrator

**Date Posted:** 2026-06-01 **Country:** United States of America **Location:** US-AZ-TUCSON-805 ~ 1151 E Hermans Rd ~ BLDG 805 **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: Top Secret **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 You Will Do** : * Maintain, configure, and support enterprise IT systems, including servers, networks, and virtual environments. * Monitor system performance and ensure availability, reliability, and security of infrastructure. * Apply system updates, patches, and security configurations in accordance with organizational policies. * Troubleshoot hardware, software, and network issues; provide timely resolution and root cause analysis. * Manage user accounts, permissions, and access controls. * Support backup, recovery, and disaster recovery planning efforts. * Collaborate with cybersecurity and engineering teams to ensure compliance with applicable standards (e.g., STIGs, RMF). * Maintain system documentation, configurations, and standard operating procedures. **What You Will Learn** * Advanced system administration techniques in secure and enterprise environments. * Implementation and maintenance of cybersecurity compliance frameworks. * Hands-on experience with modern tools for monitoring, logging, an