Principal Linux System Administrator

Principal Systems Administrator – McKinney, TX

Location:

McKinney, TX. Full‑time, onsite (100% onsite).

Security Clearance:
Active Secret clearance required prior to start date (U.S. citizenship mandatory).

Raytheon seeks a Principal Systems Administrator to support our mission by deploying and maintaining classified IT infrastructures. The role involves working in a collaborative, multi‑disciplinary environment with both Windows and Red Hat Enterprise Linux systems.

• Manage Red Hat Linux servers.
• Storage management.
• File server management.
• Access management.
• Data backup.
• Software and license configuration.
• Workstation support.
• Build new IT infrastructures for engineering groups.
• Strategize disaster recovery.
• Update virus definitions and security patches.
• Team with engineers to improve processes.
• Provide system administration in a heterogeneous Windows & Red Hat Enterprise Linux environment.
• Advanced understanding of Windows infrastructure services (DNS, file sharing protocols, DHCP, AD integration via LDAP, file system structures and permissions) and Linux distributions.
• Use troubleshooting techniques to resolve moderate to high‑scope technical problems, including OS and hardware integration.
• Perform data backup operations using appropriate technologies.
• Install and configure software applications requested by end users.
• Work with Cybersecurity professionals to maintain security requirements.
• Meet DoDD 8140 / 8570 certification requirements (CompTIA Security+ CE or equivalent) or obtain certification within 6 months of hire.

• Bachelor’s degree with 5 years of experience OR master’s degree with 5 years of prior relevant experience.
• Active, in‑scope U.S. DoD Secret clearance.
• U.S. citizenship.
• Strong Linux administration experience.

• Experience with Active Directory, VMware, system hardening, disaster recovery.
• Knowledge of NISPOM, JAFAN, JSIG, DFARS and/or DoD/RMF.
• Familiarity with High Performance Computing (HPC) environments.
• Experience with Enterprise Active Directory (AD) & LDAP.
• Experience with security posturing tools such as SCAP, Nessus, Splunk, Symantec and other AV solutions.
• Experience supporting engineers in software, simulations, and hardware development.
• Ability to troubleshoot and develop solutions with documentation.

Salary range: $86,800 – $165,200 USD (good‑faith estimate). Benefits include medical, dental, vision, life insurance, short‑term and long‑term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, parental leave, paid time off, holidays, and incentive compensation programs where applicable.

Relocation assistance is offered.

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, veteran status, or any other 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.