Principal Software Operating System Security Engineer
RTX· enterprise· Defense· Sep 14, 2026 · 1mo ago
Woburn, MA
In office
Full-time
Principal
$170K–$236K est.
8+ years exp
Job description
Date Posted:
2026-09-14 Country:
United States of America Location:
US-MA-WOBURN-WB2 ~ 225 Presidential Way ~ GODDARD BLDG 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: Secret Security Clearance Status:
Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date
At RTX, the world s largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.
Raytheon brings 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. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.
What You Will Do
• Design, deploy, and maintain RHEL-based systems in production and development environments.
• Implement OS hardening standards and security controls across Linux systems.
• Develop and maintain automated configuration workflows using Ansible or other IaC/CM tools.
• Write and maintain scripts to support system configuration, monitoring, and operational tasks.
• Apply systems engineering principles to requirements analysis, design documentation, verification, and lifecycle support.
• Troubleshoot complex issues across Linux/Windows hosts, networks, infrastructure services, and applications.
• Collaborate with cross-functional engineering teams to ensure system reliability, security, and scalability.
• Participate in technical reviews, architecture discussions, and design planning.
Qualifications You Must Have
Typically requires a bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, Software Engineering, or related field and minimum 8 years of experience
Demonstrated hands-on experience with RHEL administration.
Demonstrated background in OS hardening, security baselines, and compliance frameworks (e.g., STIGs, CIS Benchmarks)
The ability to obtain and maintain an Interim Secret U.S security clearance is required. U.S. citizenship is required as only U.S. citizens are eligible for a security clearance
Qualifications We Prefer
Proficiency in scripting languages such as Bash, Python, or similar.
Experience with Ansible or equivalent IaC/configuration management tools (e.g., Puppet, Chef, SaltStack).
Solid understanding of Linux and Windows networking fundamentals (DNS, DHCP, routing, firewalls, services).
Ability to approach problems with systems engineering thinking, including structured analysis and clear documentation.
Familiarity with virtualization or containerization technologies (KVM, VMware, Docker, Podman) is a plus.
Ability to work both independently and collaboratively in a fast-paced engineering environment.
Experience in secure enterprise or government environments.
Knowledge of CI/CD pipelines and automated testing.
Understanding of reliability, maintainability, or other systems engineering specialty areas.
Relevant certifications (RHCSA/RHCE, Security , Network , etc.).
Learn More & Apply Now
Please ensure the role type defined below is appropriate for your needs before applying to this role. This position is classified as:
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, regardless of whether the role is designated as on-site, hybrid or remote.
The salary range for this role is 107,500 USD - 204,500 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.
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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Benefits
Benefits detected in the listing.
Dental
Vision
401(K)
Paid Time Off
Parental Leave