Principal Systems Engineer (Modeling & Simulation)

Job Description

Date Posted:

2026-05-22

Country:

United States of America

Location:

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

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:

DoD Clearance: Secret

Security Clearance Status:

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

At RTX, the world 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 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.

What You Will Do

• 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.

Qualifications You Must Have

• 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 in support of system design or requirements analysis.

• Experience with system modeling, algorithm development, test vectors, or analysis tools.

• Experience with MATLAB, Python, C/C++, and/or Fortran.

Qualifications We Prefer

• Experience reading and interpreting technical design drawings and electrical schematics, including application to system understanding and analysis.

• Proven ability to take ownership of tasks and lead technical efforts across multiple stakeholders, with strong communication skills across all organizational levels.

• Experience with system requirements capture, design, and decomposition, supporting end-to-end system development.

• Strong background in radar system concepts including detection, discrimination, track and signal processing algorithms, and associated behaviors and performance analysis.

• Experience with data analysis and statistics using large datasets, conducting studies (definition and execution), MATLAB-based model development, and producing credible analytical results for customer-facing presentations.

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!

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.

• 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:

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.

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