Principal Software Engineer; Mission Systems; Onsite

Principal Software Engineer – Mission Systems Engineering Team (DFW area)

Onsite position in McKinney, Texas. Local residency or relocation required.

• Lead technical contributions, delegate and review work from lower level engineers, and influence policies, practices, and procedures.
• Provide senior level systems thinking and architecture support (systems CONOPS, specification trees, multi‑CSCI decomposition) to resolve complex issues leading up to the Preliminary Design Review (PDR).
• Operate effectively with senior architects and technical fellows, integrating across disciplines and navigating a fast‑moving environment with minimal oversight.
• Leverage subject‑matter expertise in system‑of‑systems architecture, inter‑CSCI interfaces, software requirements, and SW/HW integration to drive technical clarity across sensor and effector integrations.
• Utilize advanced modeling tools (Cameo/EA), MOSA standards, and multi‑discipline Agile leadership experience to communicate technical decisions across engineering teams, customers, and vendors, and support major design reviews.
• Architect, implement, test, and debug embedded real‑time software in heterogeneous hardware, firmware, and software environments.
• Participate in major design reviews, including PDR and CDR.
• Mentor less experienced engineers.
• Occasional business travel may be required, up to 5%.

• Degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 8 years of relevant engineering experience.
• Experience with software architecture for large‑scale and complex system‑of‑systems, subsystem interface design, and software integration and test.
• Experience with engineering and modeling tools (Cameo or Enterprise Architect, MS Visio) and familiarity with MOSA standards (OMS, AMS‑GRA, A‑GRA).
• Experience developing, testing, and integrating real‑time software applications using C++ or related languages and Linux, VxWorks, or other real‑time operating systems.
• Product‑domain experience in at least one of the following areas: RF or EO/IR sensors, electronic warfare, effectors, communications, multi‑domain mission systems.
• U.S. citizenship and the ability to obtain and maintain a U.S. government‑issued security clearance (Secret) required.

• Demonstrated collaboration with other engineering teams – Systems, Firmware, and Hardware.
• Ability to develop and present complex technical material at design reviews such as PDR and CDR.
• Ability to work effectively in a fast‑paced, dynamically changing environment.
• Proactive problem‑solving and strong ownership mindset.
• Experience working in system integration lab (SIL) environments with physical hardware, test benches, and simulators.
• Experience with Agile Scrum development practices.
• Hands‑on experience with Git for version control and Git Lab or Artifactory for repository management.
• Familiarity with Dev Sec Ops  pipelines including static analysis, automated build and test, CI/CD, and test‑driven development.
• Active U.S. Secret security clearance with special program access.

• 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.
• Annual short‑term and long‑term incentive compensation programs, subject to performance and unit agreements.
• Relocation assistance offered based on eligibility.

Salary range: 107,500 USD – 204,500 USD.

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, 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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