Senior Principal Software Engineer; ONSITE

Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements:
The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Collins Aerospace, an RTX company, develops technologies that support critical aerospace and defense missions. We are seeking a Senior Principal Software Engineer to deliver innovative software solutions in areas that may include secure communications, mission systems, cybersecurity, autonomous systems, embedded software, software modernization, Dev Sec Ops , and other advanced aerospace and defense solutions. The position may be located onsite in Cedar Rapids IA, Fort Wayne IN, Richardson TX, or Largo FL.

• Lead software engineering activities throughout the software lifecycle, including requirements analysis, architecture, design, development, integration, testing, deployment, modernization, sustainment, and related engineering efforts.
• Develop, implement, and enhance software solutions, technologies, products, systems, processes, standards, and/or capabilities across a variety of mission areas.
• Collaborate with multidisciplinary teams, customers, stakeholders, vendors, and engineering disciplines to define requirements, solve technical challenges, and deliver mission‑critical capabilities.
• Apply expert technical knowledge and domain expertise to solve highly complex challenges and deliver innovative software solutions that support customer and business objectives.
• Support the development of scalable, maintainable, reusable, and/or secure software solutions that meet program, customer, and operational requirements.
• Drive system integration, verification, validation, troubleshooting, test, deployment, and/or operational support activities to ensure high‑quality software performance, functionality, and reliability.
• Influence technical direction, engineering strategies, software architectures, and program outcomes through deep software engineering expertise.
• Communicate technical concepts, recommendations, risks, and program status to audiences ranging from engineering teams to customers and executive leadership.
• Lead significant technical efforts, initiatives, and/or projects while serving as a subject matter expert and technical authority within a discipline.

• Experience developing software applications, systems, or solutions using programming languages such as C/C++, Java, or similar languages.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• A degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of relevant experience, or an advanced degree in a related field with a minimum of 7 years of experience.

• Active and transferable Secret or Top Secret U.S. government‑issued security clearance.
• Experience developing, integrating, testing, deploying, sustaining, and/or supporting software‑based products, systems, platforms, and/or capabilities.
• Experience with Linux, embedded software, real‑time operating systems, Dev Sec Ops , CI/CD pipelines, Agile development methodologies (such as Scrum or SAFe), automated testing frameworks, and related software development environments.
• Knowledge of cybersecurity principles, secure software development practices, software assurance methodologies, requirements analysis and decomposition, systems integration, verification and validation, and related engineering disciplines.
• Experience with Model‑Based Systems Engineering (MBSE), UML, SysML, software architecture and design, requirements‑driven development methodologies, and related systems engineering practices.
• Experience supporting mission‑critical, safety‑critical, and/or regulated software development environments (for example, DO‑178 or similar standards).

• Medical, dental, and vision insurance
• Three weeks of vacation for newly hired employees
• Generous 401(k) plan with employer matching funds and a separate employer retirement contribution, including a Lifetime Income Strategy option
• Tuition reimbursement program
• Student…