Senior Principal Software Engineer (ONSITE)

Date Posted: 2026-06-10 Country: United States of America Location: US-TX-RICHARDSON-461 ~ 3200 E Renner Rd ~ RENNER BLDG 461 Position Role Type: 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 Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 Raytheon Company, Managed by Collins Aerospace At Collins Aerospace, an RTX company, we are advancing the future of aerospace and defense through innovative technologies and mission-critical solutions. Our teams develop capabilities that help connect, protect, and enable customer missions around the world. We are seeking a Sr Principal Software Engineer to join our engineering organization and help deliver innovative software solutions that support critical aerospace and defense missions. In this role, you will have the opportunity to apply your technical expertise to complex challenges while contributing to technologies that make a meaningful impact. This position may support technologies and capabilities including secure communications, mission systems, cybersecurity, autonomous systems, embedded software, software modernization, and other advanced aerospace and defense solutions. This position may be located onsite in one of the following locations: Richardson TX, Fort Wayne IN, Cedar Rapids IA, St Petersburg or Largo FL. Sign-on Bonus Eligible What You Will Do Apply expert technical knowledge to solve highly complex challenges and deliver innovative software solutions that support customer and business objectives. Lead software engineering activities throughout the software lifecycle, including development, integration, testing, deployment, modernization, and/or sustainment efforts. Develop, implement, and enhance software solutions, technical approaches, processes, and standards across a variety of technologies, products, and mission areas. Partner with multidisciplinary teams, customers, and stakeholders to solve complex technical challenges and deliver mission-critical capabilities. Drive technical solutions supporting areas such as secure communications, mission systems, cybersecurity, autonomous systems, embedded software, and software modernization. Influence technical direction, engineering strategies, and program outcomes through the application of deep domain expertise. Communicate technical concepts, recommendations, and program status to audiences ranging from engineering teams to customers and executive leadership. Serve as a subject matter expert and technical authority within their discipline Qualifications You Must Have Experience developing software applications, systems, or solutions using programming languages such as C/C++, Java, or similar languages. 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. Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 10 years prior relevant experience or an Advanced Degree in a related field and minimum 7 years of experience. Qualifications We Prefer Active and transferable Secret or Top Secret U.S. government issued security clearance. Experience working within the software development lifecycle, including design, development, integration, testing and maintenance. Experience with embedded software, real-time operating systems (RTOS), Linux, DevSecOps, CI/CD pipelines, automated testing frameworks or related software development environments. Knowledge of cybersecurity principles, secure software development practices, or software assurance methodologies. Experience supporting technical domains such as mission systems, communications systems, cybersecurity, autonomous systems or related domains. What We Offer Some of our competitive benefits package includes: Medical, dental, and vision insurance Three weeks of vacation for newly hired employees Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option Tuition reimbursement program Student Loan Repayment Program Life insurance and disability coverage Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection Birth, adoption, parental leave benefits Ovia Health, fertility, and family planning Adoption Assistance Autism Benefit Employee Assistance Plan, including up to 10 free counseling sessions Healthy You Incentives, wellness rewards program Doctor on Demand, virtual doctor visits Bright Horizons, child and elder care services Teladoc Medical Experts, second opinion program And more! Eligible for relocation Learn More & Apply Now! Do you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions — whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today. *Please ensure the role type (defined below) is appropriate for your needs before applying to 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. At Collins, the paths we pave together lead to limitless possibility. And the bonds we form – with our customers and with each other -- propel us all higher, again and again. Apply now and be part of the team that’s redefining aerospace, every day. 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 132,400 USD - 251,600 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, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement. Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance. This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply. RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window. 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 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. Privacy Policy and Terms: Click on this link to read the Policy and Terms RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.