Senior Principal Software Security Engineer

Sr Principal Software Security Engineer – Tucson, AZ

Position at RTX, a leading aerospace and defense company, for the Software Security Sensors and Effectors (S3E) Department.

• Develop real‑time missile software and embedded applications in C/C++ on diverse platforms.
• Apply system security principles to the design and implementation of missile software applications.
• Work with Systems Security Engineering to define and implement requirements.
• Support program ability to leverage specific capabilities in a common development environment.
• Interface with customer community to review technical design and verify system maturity.
• Assess performance implications of system‑security implementations.

• Bachelor’s degree in STEM and a minimum of 10 years of relevant software experience.
• Strong experience with C/C++ programming.
• Experience with Xilinx Ultra Scale+ MPSoC, Versal, or similar embedded processors.
• Experience with embedded OS such as VxWorks, Embedded Linux or equivalents.
• Embedded software security experience.
• Ability to obtain and maintain an Interim Secret U.S. security clearance prior to start.
• U.S. citizenship required.

• Validation and verification of software applications.
• Knowledge of Linux/Unix, FPGA interfacing, low‑level memory drivers, inter‑processor communication, ARM architecture, secure boot, cryptographic algorithms.
• Experience with real‑time security‑oriented solutions on DoD programs.
• Use of security‑relevant tools and devices for auditing, network, host, communication, or policy management.
• Agile/Dev Sec Ops  experience including Scrum/Kanban, configuration management, bug tracking, Python/Perl.
• Knowledge of modern CPU architectures and hardware technologies (PCIe, GPIO, I²C, SATA, FPGAs, ASICs).

Salary range: $132,400 – $251,600. Benefits include medical, dental, vision, life insurance, disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance, parental leave, paid time off, holidays, incentive compensation, and educational assistance.

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 protected class. RTX provides affirmative action 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.