Senior Embedded Software Security Engineer- S3E

RTX; Tucson (AZ); On-site; USD 87,000 - 165,000; Full time

Benefits offered by this job

Medical insurance

401(k) retirement plan

Flexible work schedules

Paid time off

Job summary

RTX in Tucson, AZ is seeking a Senior Software Security Engineer to join the Software Security Sensors and Effectsors (S3E) team. The role focuses on real-time missile software design, C/C++ development, and security-first engineering for deployed systems.

You will collaborate with Systems Security Engineering, work on embedded platforms, and help ensure secure, reliable missile software. U.S. citizenship and the ability to obtain a DoD security clearance are required.

Qualifications

• Bachelor’s in STEM and 5+ years of software experience.
• Experience with C/C++ on embedded platforms.
• Experience with Xilinx UltaScale+ MPSoC or similar embedded processors.
• Experience with embedded OS like VxWorks or Embedded Linux.

Responsibilities

• Develop real-time missile software in C/C++ on multiple platforms.
• Apply security principles to missile software design and implementation.
• Collaborate with Systems Security Engineering to define and implement requirements.
• Interface with customer to review design and verify system maturity.
• Work in a common development environment to leverage capabilities.

Skills

C/C++

Real-time software

Embedded OS

Security engineering

Python/Perl

Education

Bachelor’s degree in STEM

Tools

VxWorks

Embedded Linux

Xilinx MPSoC

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

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.

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 5 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.

Qualifications 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 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.
• Tucson is Awesome: https://www.youtube.com/watch?v=i65wOwKcNIQ
• Winter in Tucson: https://www.youtube.com/watch?v=yZdKKkF0QkE

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.

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

The salary range for this role is 86,800 USD - 165,200 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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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.