Principal Embedded Software Security Engineer -S3E

Prattwhitney; Tucson (AZ); On-site; USD 108,000 - 205,000; Full time

Benefits offered by this job

Medical, dental, vision

401(k) match

Flexible work options

Job summary

RTX's Software Security Sensors and Effectors (S3E) Department seeks a Senior Software Security Engineer in Tucson, AZ. You will design, develop, and test real-time missile software with a focus on security, using C/C++ on multiple platforms, and collaborating with Systems Security Engineering to ensure program success.

The role requires a Bachelor’s in STEM and 8+ years of relevant experience, U.S. citizenship, and the ability to obtain interim Secret clearance.

Qualifications

• Bachelor’s degree in Science, Technology, Engineering, or Mathematics (STEM) with a minimum of 8 years of software experience.
• Proficient in C/C++ programming.
• Experience with embedded processors such as Xilinx UltaScale+ MPSoC or Versal.
• Experience with embedded OS like VxWorks or Embedded Linux.
• Ability to obtain and maintain interim Secret U.S. security clearance; U.S. citizenship required.

Responsibilities

• Provide real-time missile software design, development, integration and testing.
• Apply system security principles to missile software applications.
• Develop software using C and C++ across various computing platforms.
• Understand real-time software design and performance implications for security implementations.
• Collaborate with Systems Security Engineering to define and implement requirements.
• Review and develop source-code-level solutions; understand the big picture of the missile system.
• Interface with the customer to review design and support verification of maturity.
• Work in a common development environment to leverage capabilities.
• Communicate with the customer community to review technical design.

Skills

C / C++

Embedded processors

Embedded OS

Security clearance

US citizenship

Education

Bachelor’s in STEM

Job description

Date Posted: 2026-10-30 Country: United States of America Location: US-AZ-TUCSON-801 ~ 1151 E Hermans Rd ~ BLDG 801 (External Site) 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 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.

Software Security Sensors and Effectors (S3E) Department is looking to hire a Senior Software Security Engineer in Tucson, AZ. Raytheon Tucson, AZ Location

Our Culture | RTX Careers

What You Will Do:

• Our mission is to provide world class Security Software to be used in deployed missile systems.
• This position requires understanding of real-time software design and the performance implications associated with specific System Security implementations.
• Involve with application and embedded software design, development, integration, and testing of real-time missile software.
• Apply System Security principles to the design and implementation of Missile software applications.
• Develop software applications using C and C++ languages on a variety of computing platforms.
• Understand real-time software design and the performance implications associated with specific System Security implementations.
• Able to understand how position's efforts affect the “big picture” of the missile system and be able to develop or review detail solutions at the source code level.
• Work closely with the Systems Security Engineering team to define and implement 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.
• Experience with C / C++.
• Experience with Xilinx UltaScale+ MPSoC, Versal, or similar Embedded Processors.
• Experience with embedded OS like VxWorks, Embedded Linux, or similar.
• The ability to obtain and maintain an interim Secret Level U.S. security clearance is required prior to start date with the ability to obtain program access after start.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

We Prefer:

• Embedded Software Security experience.
• Experience/Knowledge of any of the following: Linux/Unix environment.
• Interfacing with FPGAs.
• Interfacing with low-level memory drivers.
• Inter-processor communication.
• ARM Architecture.
• Secure boot concepts.
• Cryptographic Algorithms.
• Experience designing, implementing, testing, or fielding real-time security-oriented solutions on Department of Defense (DoD) programs (embedded experience highly preferred).
• Experience using security-relevant tools and devices for security auditing, network security, host/server security, communication security, or policy management.
• Experience in Agile and DevSecOps environments.
• Experience in an Agile/Scrum/Kanban frameworks and development environments.
• Experience using software configuration management and bug tracking tools.
• Experience with Python / Perl.
• Knowledge of modern computer architectures and hardware technologies including: PCIe, GPIO, I2C, SATA.
• Field Programmable Gate Arrays (FPGAs).
• Application-Specific Integrated Circuits (ASICs).

What We Offer:

• Whether you’re just starting out on your career journey or is 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.
• Hired applicants may be eligible for benefits, including 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.

Location Information:

This position is onsite at our campus in beautiful Tucson, AZ. Tucson has a friendly, caring, and laid‑back atmosphere, combined with the innovation and energy of a metropolitan region, and recognized as one of America’s 10 Best Small Cities. Surrounded by beautiful mountains, colorful Sonoran Desert landscape and majestic saguaro cacti, Tucson is blessed with some of nature’s best work. Tucson is known for its bright blue skies, and with more than 310 sunny days per year, Tucson’s fantastic weather lets residents enjoy the outdoors year‑round.

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.

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. This position requires a security clearance.

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.

DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm

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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RTX 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, Pratt & Whitney, and Raytheon. Its 195,000 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, Virginia.