Principal Mechanical Engineer - Mechanism Design

Date Posted: 2026-06-09 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. What You Will Do Develop technical solutions for a broad range of mechanism and machine design challenges supporting advanced radar systems and subsystems. Design and analyze motion control actuation systems, including custom actuators, geartrains, bearings, and other mechanical machine elements. Perform kinematic and dynamic analysis of mechanisms, along with first-order structural, thermal, tolerance, and margin analyses. Support the full mechanical design lifecycle, including requirements development, concept generation, trade studies, material selection, free-body diagram development, and geometric dimensioning & tolerancing (GD&T) application. Create and support 3D models, engineering drawings, tolerance analyses, and manufacturing documentation required for hardware realization. Partner with manufacturing and test teams to support prototype builds, tooling development, integration activities, and verification testing. Participate in technical and design reviews while ensuring designs meet performance, quality, manufacturability, and reliability requirements. Lead mechanical development efforts for radar systems and components while balancing technical performance, schedule, cost, and risk considerations. Collaborate closely across multi-disciplinary engineering teams, suppliers, and program leadership to drive technical execution and resolve complex design challenges. Provide technical leadership and sound engineering judgment while working with minimal oversight and significant latitude in determining technical approaches and solutions. 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 or an advanced degree in a related field and minimum 5 years experience. Experience of mechanical design for military or aerospace or commercial applications. Experience with any of the following: Development of different actuation drive systems, examples include power management, motor and/or gear train sizing and implementation (spur gear, ball screw, lead screw, etc.) or associated bearing configurations for optimization of friction and position accuracy, and/or load capacity or electromechanical control actuation systems or design experience mechanism synthesis and analysis. Qualifications We Prefer Experience with development of control actuator systems requirements, architecture, requirements risk, design and system performance. Experience with feedback control systems, including sizing, testing and integration, design-for-manufacturing, kinematic and dynamic simulation and analysis. Proficient in Geometric Dimensioning and Tolerancing per ASME Y14.5. Proven ability to deconstruct higher level tasks into discrete lower-level work packages and tasks. Proficient in generating free body diagrams. Experience with CREO(Pro/E) or similar 3D solid modeling software. Experience with ANSYS Mechanical or similar FEA modeling software. Working knowledge of Microsoft Office (Word, Excel, PowerPoint). Excellent verbal and written communications and interpersonal skills when working with team members and customers. Advanced degree in Mechanical, Electrical or Aerospace Engineering. What We Offer A total rewards package that goes above and beyond with compensation; healthcare, wellness, and work/life benefits; career development and recognition programs. Some of the benefits we offer include parental (including paternal) leave, flexible work schedules, achievement awards, educational assistance and child/adult backup care. Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Trust, Respect, Accountability, Collaboration, Innovation, and Safety. Relocation assistance available. Learn More & Apply Now! 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. This position requires 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: #LI-TR1 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. Privacy Policy and Terms: Click on this link to read the Policy and Terms 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 that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.