Principal Systems Engineer - Responsible Systems Engineer (RSE)

Date Posted: 2026-07-31 Country: United States of America Location: US-AZ-TUCSON-805 ~ 1151 E Hermans Rd ~ BLDG 805 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: Top Secret - Current 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. Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today's mission and stay ahead of tomorrow's threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense. The Systems Engineering and Test Center (SETC) organization is currently hiring a Principal Systems Engineer - Responsible Systems Engineer to join our Tucson, AZ team in the Effectors System Engineering Department. The SETC organization is an exciting and challenging environment where you will have the opportunity to design, develop and partner with multi-disciplines to shape innovative solutions for our customers. Join our organization and experience the Systems V engineering life cycle while interfacing with a variety of engineering disciplines, subject matter experts, chief engineers, chief technologists, the customer, and so many more to ensure we design, integrate, and strengthen our systems to work the first time and every time for our warfighters! As a Principal Systems Engineer - Responsible Systems Engineer you will lead the effort to update and maintain all system and subsystem level requirements specifications and be the Systems technical lead ensuring all requirements are being assessed during Verification and Qualification testing. You will engage with the Systems and Hardware teams and Chief Engineer on a variety of program technical tasks. This role is fully Onsite in Tucson, AZ . What You Will Do

• Lead effort to update and maintain all system and subsystem level requirements specifications
• SE technical lead for verification and validation efforts, ensuring all requirements are being assessed during Verification and Qualification Testing
• SE technical lead, working closely with the Systems and Hardware IPTLs and Chief Engineer on a variety of program technical tasks.
• Lead Systems Verification Reviews with the Chief Engineer, Lead Systems Engineer, and Integrated Product Team Leadership.
• Become the knowledgeable and 'go-to' Systems Engineer for the program.
• Help to onboard new team members, mentor, and guide them using core Systems Engineering skills.

Qualifications You Must Have

• Typically requires a Bachelor's in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of eight (8) years of prior relevant experience
• Experience with at least one of the following: systems software, systems firmware, systems hardware, systems requirements, systems integration, and/or systems test.
• Experience in test planning, verification of system requirements and/or system qualification
• Active and transferable Top Secret Security Clearance is required prior to start date.

Qualifications We Prefer

• Advanced degree in Engineering, Computer Science, Math or Physics
• Experience in the Defense Industry and specifically with military systems; tactics, techniques, and procedures, as well as Department of Defense customer infrastructure experience.
• Experience using Agile framework development methods / processes
• Customer focus and collaboration skills
• Experience with performance analysis
• Experience with DOORS, Cameo and/or cPDM
• Understanding of the Systems Engineering Product Development Cycle
• Experience with Earned Value Management System (EVMS) or Cost Account Management (CAM) Certification

What We Offer

• Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.
• Relocation Eligible - Relocation assistance available for this position

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.

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 107,500 USD - 204,500 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 Raytheon