Principal Software Security Engineer, Onsite

Date Posted: 2026-09-23 Country: United States of America Location: US-CA-EL SEGUNDO-E01 ~ 2000 E El Segundo Blvd ~ BLDG E01 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 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 Enginee r to join our Software Product Assurance team in El Segundo, CA. 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 What We Offer: Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Trust, Respect, Accountability, Collaboration, and Innovation. Some of our employee benefits include: The RTX Employee Scholar Program pays for tuition, academic fees and books for undergraduate and graduate study at approved educational institutions 401(k) plan that offers a broad range of investment options. For eligible employees, we will match up to 4% of your savings to help you build financial security Flexible work schedules and paid time off to accommodate work/life balance including many with every other Friday off Learn More & Apply Now! 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. This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA , 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   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 118,300 USD - 224,900 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