Senior Principal SEIT Engineer

Company: RTX
Location: Anaheim
Posted on: April 1, 2026

Job Description:

Date Posted: 2026-03-19 Country: United States of America Location: US-CA-ANAHEIM-406 ~ 160 N Riverview Dr ~ BLDG 406, Ste 150 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: TS/SCI with Polygraph Security Clearance Status: Active and existing security clearance required after day 1 Raytheon Company Managed by Collins Aerospace This role is primarily On-Site, with flexibility at hiring manager discretion. Applied Signal Technology (AST) is seeking a Senior Principal SEIT Engineer who strives for excellence and have a passion to be part of a team that strengthens our nation and improves the security of our world. AST provides trusted strategic and tactical SIGINT solutions that secure the interests of the U.S. and its partners. AST’s work in areas such as high-capacity broadband communications, signal processing and analysis, tactical SIGINT, and wireless communications continually challenges our extraordinary engineers to resolve problems and make the world a safer place. AST’s work environment is dynamic, highly collaborative and provides engineers the freedom to strengthen and expand their skills, explore new and creative ideas, and work closely with our nation’s finest service members all while embracing integrity, innovation and work-life balance. The Senior Principal SEIT Engineer will have a strong background in algorithm development and signal analysis with experience in GNSS anti-jamming and anti-spoofing systems to join our advanced systems engineering team. This position will lead the integration and validation of complex systems where performance hinges on high-fidelity signal processing, algorithmic robustness, and system-level optimization. This is an ONSITE position located at our Anaheim Hills, CA location. To find out more about AST please, click the link below: Applied Signal Technology: WHO WE ARE What You Will Do: You will play a critical role in connecting theoretical algorithm development with practical implementation and test, ensuring end-to-end system performance through simulation, prototyping, and rigorous verification in lab and field environments. Serve as the technical lead for SEIT activities related to signal processing algorithms and system-level analysis. Drive the design, integration, and validation of algorithms for RF, EO/IR, GNSS, communications, or radar systems. Translate mission-level performance needs into algorithmic and system requirements. Develop and maintain signal models, simulations, and performance tools to characterize system behavior. Collaborate with software, hardware, and systems teams to integrate and verify algorithms in real-time or embedded systems. Conduct statistical and spectral analysis of recorded and simulated signals to assess algorithmic performance. Lead lab-based and field test efforts, including hardware-in-the-loop (HIL) and sensor stimulation environments. Define and execute V&V strategies, including test plans, performance metrics, and traceability matrices. Mentor junior engineers and contribute to system architecture discussions. Travel up to 25% Qualifications You Must Have: Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience 10 years of experience in systems engineering with a specialization in algorithm development and signal analysis. At least 5 years of experience in evaluating GNSS systems. Proficiency in MATLAB, Python, or C/C++ for modeling, analysis, and algorithm prototyping. Strong understanding of signal processing techniques such as filtering, detection, estimation, FFTs, modulation/demodulation, and time-frequency analysis. Hands-on experience integrating algorithms into complex systems and validating performance in lab or field. Experience with model-based systems engineering (MBSE) and system lifecycle documentation. Proven ability to work across disciplines and lead technical integration efforts. Ability to obtain and maintain a Top-Secret SCI (TS/SCI) U.S. government issued security clearance with polygraph is required after start. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Qualifications We Prefer: Bachelor’s or Master’s degree in Electrical Engineering, Applied Physics, Systems Engineering, Mathematics, or related technical field. Ph.D. preferred Background in GNSS, radar, SIGINT, communications, or EW systems. Familiarity with digital signal processing (DSP) hardware, FPGA-based systems, or SoC platforms. Experience with high-fidelity simulation tools like STK, Simulink, or custom RF environments. Existing Top-Secret SCI (TS/SCI) security clearance with polygraph (within the last 24 months) What We Offer? 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 ? Eligible for relocation And More! 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. AST 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 145,600 USD - 276,800 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

Keywords: RTX, Huntington Beach , Senior Principal SEIT Engineer, IT / Software / Systems , Anaheim, California