Systems Engineer II (Modeling & Simulation)

Date Posted 2026-04-09Country: United States of AmericaLocation US-MA-TEWKSBURY-TB3 ~ 50 Apple Hill Dr ~ CONCORD BLDG, Tewksbury Tb3 300 ConcordPosition Role Type: OnsiteU.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 clearanceSecurity Clearance Type: DoD Clearance: SecretSecurity Clearance Status: Ability to obtain INTERIM U.S. government issued security clearance is required prior to start dateAt 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 Systems Engineer II (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 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. 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. 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 2 years of prior relevant experience. Experience with system modeling, algorithm development, test vectors, or analysis tools. Experience with MATLAB, Python, C/C++, and/or Fortran. Qualifications We Prefer Experience in complex digital signal processing, including developing time‐domain signal models. Background in system requirements capture, design, decomposition, and radar system concepts. Ability to interpret technical drawings, schematics, and perform large‐scale data analysis and statistical evaluations. Experience conducting studies and analyses, including defining and executing study plans. Proficiency with MATLAB and leading technical efforts across multiple stakeholders with strong communication skills. 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 inf