Senior Principal SEIT Engineer

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