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Principal Software Security Engineer

RTX
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McKinney, TX, USA
Sep 29, 2026

Date Posted:

2026-09-28

Country:

United States of America

Location:

US-TX-MCKINNEY-513PW ~ 2501 W University Dr ~ PW 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:

Active and existing security clearance required on day 1

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.

At RTX, the world 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.


We are currently seeking a Principal Software Security Engineer to join our Software Product Assurance team in McKinney, TX.


What You Will Do:

  • Our mission is to provide world class Security Software to be used in developing and supporting deployed sensor systems on various platforms.
  • Implement Software Security principles to embedded software design, development, integration, and testing of real-time sensor software.
  • Develop software applications using C and C++ languages on a variety of computing platforms
  • Ensure the SW Product Assurance processes are followed on our programs
  • Understand real-time software design and the performance implications associated with specific System Security implementations.
  • Work closely with cross functional Engineering teams to define and implement Test Driven Multidisciplinary Capability (TDMC) based execution development and deployment requirements.
  • Work in a common development environment to support and facilitate program ability to leverage specific capabilities.
  • Interface with customer community to review technical design and support verification of system maturity.

Qualifications You Must Have:

  • Typically requires a Bachelor’s in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 8 years of relevant software experience
  • Expertise with C / C++
  • Experience with Static analysis concepts, methods & tools
  • Experience with Xilinx UltaScale+ MPSoC, Versal, or similar Embedded Processors
  • Experience with embedded OS like VxWorks, Embedded Linux, or similar
  • Experience using scripting languages like Python, Perl, or similar
  • Embedded Software Security experience
  • Active and transferable U.S. Government issued Secret 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 with Secure boot, containerization and software hardening
  • Experience with Cryptographic Algorithms
  • Experience in a technical leadership role to grow and lead a small technical team
  • Experience/knowledge of any of the following:
  • Designing, implementing, testing, or fielding real-time security-oriented solutions on Department of War (DoW) programs (embedded experience highly preferred)
  • Kernel or Device Driver development
  • Petalinux/Yocto operating systems
  • Agile/Scrum/Kanban frameworks and DevSecOps environments
  • Knowledge of modern computer architecture and hardware technologies including:
  • ARM Architecture
  • Interface protocols: PCIe, GPIO, I2C, SATA
  • Field Programmable Gate Arrays (FPGAs)
  • Application-Specific Integrated Circuits (ASICs)
  • Using software configuration management and bug tracking tools
  • Experience with validation and verification of software applications


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, 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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Job ID

01877781

Security Clearance

SECRET
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