Principal Mechanism Design Engineer

Date Posted: 2026-11-10 Country: United States of America Location: US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1 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: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 At RTX, the world's 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 freedom and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense. The Radar Mechanical Design Department leads mechanical design, development, and integration of some of the most innovative land-based and shipboard radars in the world. This includes phased array radar systems, electronic modules, pedestals, and power and cooling systems. The department comprises individuals with technical expertise and experience in hardware design, integration, and production support. In this position, you will be responsible for developing technical solutions for a wide range of mechanism and machine design challenges, such as mechanical design of motion control actuation systems & subsystems, including custom actuator and geartrain design, kinematic and dynamic analysis of mechanisms, design of machine elements, bearing design, selection and analysis. Responsibility extends across the entire life cycle of the product, from conceptualizing and design, to prototyping and manufacturing, integration and verification testing, through production support. You will be expected to apply sound first principles understanding to solve complex system problems while teaming with a cross-discipline team including electrical engineering, systems engineering, RADAR systems engineering, flight science, manufacturing engineering, supply chain and others. Specific tasks may include requirements development and comprehension, concept development, trade study evaluation, free-body diagram generation, first order structural and thermal analysis, gear analysis, material assessment and selection, 3D modeling support, datum selection and application of geometric dimensioning and tolerance, tolerance analysis, margin analysis, support of drawing development, support of manufacturing process and build tooling development, support of test process and test equipment development and participation in design reviews. Day-to-day activities are highly collaborative, both internally across disciplines as well as externally with suppliers. Hands-on opportunity is plentiful, as great emphasis is put on exposing designers to the hardware through participation in prototype building and verification testing, thus enabling firsthand knowledge of system performance. Mechanical Engineering is searching for an experienced Principal Mechanism Design Engineer to work in the Radar Design Department. This onsite role will be based in Marlborough, MA or Tewksbury, MA. What You Will Do Develop technical solutions for a wide range of mechanism and machine design challenges. Mechanical design of motion control actuation systems & subsystems, including custom actuator and geartrain design. Kinematic and dynamic analysis of mechanism…

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