Principal Software Security Engineer, Onsite

Date Posted: 2026-09-16 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’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. We are currently seeking a Principal Software Security Engineer to join our Software Product Assurance team in El Segundo, Los Angeles County, CA as a SW Security Individual Contributor supporting development for the SW Product Assurance (embedded program protection and cyber) of our portfolio of programs at the site. 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 degree in Science, Technology, Engineering or Mathematics (STEM) AND a minimum of 8 years of prior relevant experience. Experience in embedded software security and C, C++ Experience with embedded OS like VxWorks, Embedded Linux, or similar Experience with Xilinx UltaScale+ MPSoC, Versal, or similar Embedded Processors Active and transferable U.S. government issued Secret security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance. Qualifications We Prefer: Experience with Static analysis concepts, methods & tools Experience with Secure boot, containerization and software hardening Experience with Cryptographic Algorithms 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 Secure Boot 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 Cyber security experience. Using security-relevant tools and devices for security auditing, network security, host/server security, communication security, or policy management. Experience with validation and verification of software applications What We Offer: A total rewards package that goes above and beyond 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. Relocation Eligible – Relocation assistance available 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 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,