Senior Mechanical Design Engineer

Job ID: 01878059Posted: Posted TodayStart Date: 2026-09-25Location: US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1; US-MA-ANDOVER-AN1 ~ 350 Lowell St ~ AN1 ESSEX BLDG; US-MA-TEWKSBURY-TB1 ~ 50 Apple Hill Dr ~ ASSABET BLDGCountry: United States of AmericaTime Type: Full timeDate Posted:2026-09-25 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 1At 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 freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense. The ideal candidate for Senior Mechanical Engineer will bring a blend of technical ability, experience in mechanical hardware design, system integration skills, and a strong background in program execution whether design and development or production support. As a key contributor on a mechanical or cross-functional engineering team, you will take responsibility for component and assembly modeling, documentation, design changes, and releases processes. This position is ideal for a mid-career mechanical engineer who is looking to grow their skills in design, manufacturing, and technical problem-solving within a highly collaborative and mission-focused environment. This is an onsite position and can be located at one of the following Massachusetts locations - Tewksbury, Andover, or Marlborough. What You Will Do Design: Developing innovative technical solutions to a wide range of complex challenges spanning the entire product lifecycle, including proposal, advanced development, design, cooling, manufacturing, integration, and testing of radars, support equipment and electronics for military programs. Perform tolerance analyses to ensure form, fit, and function are as intended by design for the use-application. Lead small teams utilizing strong mechanical hardware design experience and knowledge in a fast-paced collaborative environment with ruggedized structures, interconnects, cooling, electronics packaging, tooling and/or array integration. Provide support for product integration and efforts in both domestic and international factories and supplier locations to assess requirements compliancy. Teaming/Communication: Collaborate with cross-functional teams including other engineering disciplines, operations, supply chain, quality, and external suppliers to resolve technical challenges and develop effective design solutions. Independently manage tasks and deliver on schedule, budget, and technical goals. Participate in design reviews and conduct trade studies to support informed, sound engineering decisions. Mentor and guide less experienced engineers, contributing to team development and technical growth. Qualifications You Must Have Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience or an Advanced Degree in a related field and minimum 3 years’ experience. Experience in the creation, review and interpretation of technical documentation utilized in the development or production of hardware or tooling products. Experience in mechanical design, advanced design development, manufacturing or tooling processes, or related areas. Experience in the development, creation, release, or updates of engineering drawings utilizing a 3D CAD design tool. 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.​ Qualifications We Prefer Technology and expertise: Proven mechanical design ability in a production or advanced development environment. Experience in design, fabrication, or integration of Electronics Packaging, design and development of Electronic Systems, including interconnects, power distribution, cooling, RF or tooling products. Technical Data Package creation, change notice processing including communication of required functional and performance requirements. Experience using CREO CAD design and documentation tools or similar 3D solid modeling software with a configuration and data management environment. Experience in Geometric Dimensioning and Tolerancing. Experience with cost and/or schedule reporting or proposal development. Highly detail-oriented with a demonstrated ability to work effectively within cross-functional teams. Familiarity with Military and/or Commercial Specifications and requirements Willingness to travel (domestic and international) Advanced degree in mechanical engineering, aerospace hardware systems design 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 Offered Based On Eligibility Learn More & Apply Now! (Optional) 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. 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: This position is an onsite role – Greater Boston metropolitan area: 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 86,800 USD - 165,200 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