Principal Lead Systems Engineer at RTX in Fullerton, CA

Principal Lead Systems Engineer Location: US-CA-FULLERTON-675 ~ 1801 Hughes Dr ~ BLDG 675 Date Posted: 2026-06-22 Country: United States of America Location: US-CA-FULLERTON-675 ~ 1801 Hughes Dr ~ BLDG 675 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: Secret - Current Security Clearance Status: Active and existing security clearance required on day 1 At Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression.  We bring 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.  Our team solves tough, meaningful problems that create a safer, more secure world. Raytheon engineers develop the next generation of defense technologies that support our military and protect our nation and allies. We are the world’s leader in developing cutting edge defense technologies through simulation-driven virtual environments. Our products empower the next generation of innovative weapons systems and advanced Artificial Intelligence (AI) and Machine Learning (ML) solutions. We’re looking for a Systems Engineer who enjoys solving complex problems, engaging in a dynamic team environment, and is eager to learn. The Sentinel Lead Systems Engineer for Transmitter integration will serve as the technical lead to the Product Team. What You will Do Serve as technical lead for the integration of a new Transmitter into an existing radar system. Serve as the principal arbiter of the Transmitter requirements and performance, interpreting internal and external customer requirements and objectives, effectively decomposing them into actionable direction for the program team and stakeholders. Validate and update the Transmitter requirements, lead the design activity to insert the Transmitter into the existing radar design, and lead the hands-on integration and verification of the Transmitter and the Radar System. Coordinate the flight test planning and conduct flight tests in Fullerton and possibly other U.S. test ranges. Analyze performance, functional, environmental and other qualification data and conduct customer acceptance testing.  Prepare verification procedures and reports. Protect the system’s technical integrity to ensure we deliver a product that meets the customer and warfighter’s needs while working through challenges to accelerate schedule. Coordinate with other Radar Systems engineers who are already familiar with this radar and will provide support for this activity Communicate regularly with Raytheon leadership and the customer to provide program status, accomplishments, issues, and help needed. Ability to travel ~20% Qualifications You Must Have Typically requires a Bachelor’s Degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience Experience in a technical leadership position. Experience in requirements analysis and specification. Experience with System Integration & Test and Verification of hardware and software. Prior experience in one or more of the following: RF transmitters, generators, power supplies, microwave devices, interfaces, cooling methods, reliability, trade studies, radar engineering, mechanical engineering, and/or electrical engineering. Qualifications We Prefer Excellent communication, technical writing, oral presentation, and interpersonal skills Advanced Degree in Engineering, Science, Mathematics, or related STEM degree Raytheon Level 4 Certified Lead System Engineer or Lead System Engineer on a Development Program Experience leading an effort or team, interfacing with multiple engineering disciplines and developing and presenting technical briefings Knowledge in radar design, modeling/simulation, hardware/software integration, test and verification Ability to develop effective internal and external customer/stakeholder relationships to ensure customer/stakeholder satisfaction and continued business. Experience overseeing and presenting financial metrics (e.g., budget, schedule, variance reports, earned value metrics). 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. This position is located onsite in Fullerton, CA. 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 118,300 USD - 224,900 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