Principal Linux Administrator (Onsite - TS/SCI w Poly Required)

Date Posted:

2025-11-19

Country:

United States of America

Location:

TX190: 2501 West University, McKinney 2501 West University , McKinney, TX, 75070 USA

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:

TS/SCI with Polygraph

RTX Corporation is an Aerospace and Defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses – Collins Aerospace Systems, Pratt & Whitney, and Raytheon. Its 185,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, VA.

The following position is to join our RTX Enterprise Services team:

Role Overview:

RTX is seeking a Principal Linux Administrator to support a highly virtualized Enterprise infrastructure with a focus on Linux-based systems. The role involves working under the supervision of technical team leaders in collaboration with team members across multiple sites.

This role is ideal for candidates with specialized expertise in Linux system administration, a commitment to collaboration, and the ability to work in a high-security environment.

This role is onsite in either McKinney, TX or Tucson, AZ. It requires an active TS/SCI with CI Poly clearance in order to be considered.

What You Will Do:

• Install and manage Linux server hardware, operating systems, and software.
• Perform software upgrades, patching, and system maintenance on Linux systems.
• Troubleshoot issues and apply security policies specific to Linux environments.
• Conduct information assurance testing and vulnerability mitigation for Linux systems.
• Maintain data storage and monitor server operations.
• Manage backup systems and provide Tier 2 support to the IT Service Desk.
• Document processes and ensure compliance with organizational policies.
• Provide remote support for systems across multiple locations.

Qualifications You Must Have:

• Typically requires a University Degree or equivalent experience and a minimum 5 years of experience, or an Advanced Degree and a minimum 3 years experience.
• Experience supporting Linux operating systems in enterprise environments.
• Experience managing VMWare virtual environments.
• Clearance: Active TS/SCI with CI Poly Clearance.
• Certification: Existing DoD 8570 security certification (e.g., Security X, Security+, CISSP), or the ability to obtain one within 6 months of starting.

Qualifications We Prefer:

• Familiarity with Agile tools such as Atlassian Jira and Confluence.
• Knowledge of security policies related to IT systems in secure environments, with a focus on Linux.
• Proficient in performing system maintenance, installations, upgrades, and backups on Linux systems.
• Team-oriented with strong collaboration skills across multiple sites.
• Ability to learn and follow documented policies and standards.
• Excellent customer service, communication, and process documentation skills.

What We Offer: Whether you’re just starting out on your career journey or are an experienced professional, we offer a robust total rewards package with compensation; healthcare, wellness, retirement and work/life benefits; career development and recognition programs. Some of the benefits we offer include parental (including paternal) leave, flexible work schedules, achievement awards, educational assistance and child/adult backup care.

Learn More & Apply Now!
Work Location: Onsite - McKinney, TX or Tucson, AZ - Relocation assistance can be offered for qualified candidates
Please consider the following role type definition as you apply for this role:

Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations