Principal Mechanical Engineer

Date Posted: 2026-03-09 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 Raytheon, the foundation of everything we do is rooted in our values and a higher calling to help our nation and allies defend freedoms and deter aggression. We bring the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of todays mission and stay ahead of tomorrows threat. Our team solves tough, meaningful problems that create a safer, more secure world. 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. We have an opportunity for an experienced Principal Mechanical Engineer to support our radar development programs. This person will be responsible to lead mechanical teams in all phases of our design cycles, from concept development through design, development, build and test. Key requirements for this position include proven problem-solving skills and experience in hardware design and integration, engineering analysis, and mechanical drawing creation with military hardware. Individuals will interface and collaborate primarily with other engineering disciplines, as well as operations, systems, quality and program offices. This Principal Mechanical Engineer is an on-site role based in Marlborough, MA or Tewksbury, MA. What You Will Do Utilizing strong mechanical hardware design experience and knowledge with ruggedized structures, interconnects, cooling, and array integration Supporting all phases of programs from capture and concept development through production Developing technical solutions to a wide range of complex problems related to the entire product life cycle including proposal, design, manufacture, integration and test of phase array radars/electronics for multiple military programs Supervising the definitions of mechanical outline and construction details, component selection and specification, mechanical and assembly drawings, electrical/RF layout, and delivering the final technical data package Employing transition-to-production practices with the ability to lead a design release into production Tracking, reporting, and meeting cost, schedule, quality, and performance requirements for the finished product, including Earned Value (EV) management and Estimate at Complete (EAC) inputs Preparing proposal inputs on behalf of the product area Providing technical conscience, challenged with making sure the product and process meet appropriate standards and requirements while helping to remove roadblocks Working with minimal direction or supervision, while exercising considerable latitude in determining the technical objectives of the assignment while meeting cost, schedule, quality, and performance requirements for the finished product. Leading a small team of mechanical engineers when required Interacting frequently with senior personnel, occasionally including external customers, on significant technical matters often requiring coordination between organizations. 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. A minimum of eight (8) years of experience in the design of radar architecture or electronics packaging for military or aerospace or commercial applications Experience with GD&T (Geometric Dimensioning & Tolerances) 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 Experience with ANSI drawing standards and/or first order or structural analysis techniques. Experience with design to military standards Strong technical background with high technical aptitude Strong leadership skills and project management, sub contract management experience Experience with CREO (Pro/E) or similar 3D solid modeling software Cognizant of machine suppliers capabilities or have direct experience in a manufacturing and assembly support role for producibility Familiarity with the design and manufacturing processes of CCAs, mechanical/RF components, metal housings, structures, and electronics assemblies Must have a working knowledge of Microsoft Office (Word, Excel, PowerPoint) Very strong 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 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 Eligible - relocation assistance is available for this position 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. This position requires onsite work in Marlborough, MA or Tewksbury, MA. 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 candidates 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 companys 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.