Principal Systems Engineer (Modeling & Simulation)

Date Posted: 2026-01-20

Country: United States of America

Location: US-MA-TEWKSBURY-TB3 ~ 50 Apple Hill Dr ~ CONCORD BLDG, Tewksbury Tb3 300 Concord

Position Role Type: Onsite

Security Clearance Requirements

• U.S. Citizenship 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 transferable U.S. government issued security clearance is required prior to start date. Ability to obtain INTERIM U.S. government issues security clearance is required prior to start date

About Raytheon

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.

About the Role

The Systems Engineering Integrated Systems department is seeking a Principal Systems Engineer (Modeling & Simulation). The Integrated Systems team leads all aspects of systems engineering that drive the development of complex systems supporting the Raytheon Land and Air Defense Systems (LADS) mission area from our Tewksbury, MA location. The department supports Raytheon by cultivating a world-class group of systems thinkers who collaborate to architect technical solutions to some of the world's toughest challenges. This is a full-time onsite position based in Tewksbury, MA.

Responsibilities

• Contribute and collaborate in a team environment receiving input from the program or team experts and contributing your knowledge to advance the discussions
• Communicate with cross-functional engineering teams to coordinate design plans and requirements analysis
• Contribute your knowledge of performance engineering practices and procedures to evaluate work across a wide range of intriguing subject areas
• Manage program technical risks by evaluating requirements and design aspects
• Develop models to validate proposed architectures and designs against requirements as well as help shape future tech growth
• Develop and maintain modeling tools incorporating Digital Signal Processing (DSP) with complex time domain elements
• Analyze data to understand performance and perform root cause analysis
• Incorporate radar system concepts including detection, discrimination, track and signal processing algorithms to model their behaviors and analyze performance
• Incorporate effector system concepts to model their behaviors and analyze performance

Required Qualifications

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience
• Experience with Digital Signal Processing, including development or application of time-domain signal models to support system design and requirements analysis
• Experience with system modeling, algorithm development, test vectors, or analysis tools in support of evaluating radar requirements and performance
• Experience with MATLAB, Python, C/C++, and/or Fortran
• Ability to obtain Interim Secret U.S. government issued security clearance is required prior to start date

Preferred Qualifications

• Experience with reading and understanding technical design drawings and electrical schematics
• Experience with taking ownership of tasks and leading technical efforts spanning multiple stakeholders, and being able to communicate effectively with all levels of the organization
• Experience with system requirements capture, design, and decomposition
• Experience with radar system concepts; detection, discrimination, track and signal processing algorithms and their behaviors and performance
• Experience with data analysis and statistics with large volumes of data
• Experience conducting analysis and studies, including how to define and execute a study
• Experience using MATLAB for model development
• Demonstrated technical and analytical skills to develop credible results for presenting to the customer

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 assistance is available!

Compensation

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.

Benefits

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
• 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.

Additional Information

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.

Role Type Definition: Onsite employees 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.

Clearance Information: This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm

Interview Process: 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.

Application Window: 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.

Equal Opportunity

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.

About RTX

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.