SD&I - Sr. Principal Mechanical Engineer

Company: RTX
Location: Marlborough
Posted on: April 1, 2026

Job Description:

Date Posted: 2026-01-29 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 today’s mission and stay ahead of tomorrow’s threat. Our team solves tough, meaningful problems that create a safer, more secure world. Raytheon Mechanical Engineering (ME) is the premier organization for mechanical hardware design, development, production, and research. ME strives to minimize total systems cost, while maximizing production. This is achieved through commitment, training and continuous improvement using common tools and processes. The capabilities encompass a broad range of technical disciplines which include engineering, operations, technical services, materials and processes, analysis and test and documentation. The Mechanical Engineering Department is seeking a Senior Principal Mechanical Engineer to provide Site Development and Integration (SD&I) expertise. The Site Development & Integration section performs large scale, complex site development and onsite support. Engineers will perform research, design, support construction and development of military and commercial facilities. The position is for the Marlborough, Massachusetts location. This position is an onsite role. What You Will Do Provide technical leadership to site construction projects in support of USG and Foreign military customer product installations. Drive technical requirements for site construction to programs and contractors across multiple programs. Provide technical oversight to internal team and contractors during site construction and integration. Identify and manage risks and opportunities and associated mitigation and capture plans as they relate to the site activation. Responsible for new business proposal’s site development and integration scope, ensuring proposals have a robust technical baseline and address risk and opportunities. Support site surveys for facility infrastructure solutions. Develop facility requirements and design development documents for defense system equipment in accordance with system requirements. Work with Architect/Engineering (A/E) contractors for facility design effort. Review and approve shop drawings and construction specifications. Collaborate and coordinate work activities with Raytheon, Government, and subcontractors. Basic knowledge of DOD codes and standards, including Unified Facility Codes (UFC’s) for site installations. Travel is expected to be 20% both domestically and internationally. Travel could include multiple week duration trips. Qualifications You Must Have Bachelors degree from an ABET accredited University and has passed the fundamentals of Engineering Exam (EIT/FE) plus ten (10) years of related experience or demonstrated equivalency of experience and/or education. Familiar with the use of drafting software including Revit and AutoCAD. Familiarity with building codes for commercial, industrial and military/Department of Defense (DoD) facilities. 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 working with and developing Facility Requirement Documents. Comfortable working in a high energy environment with multiple concurrent and quick-turn deadlines. Willingness to learn and desire to overcome challenges to achieve individual and team success. Strong written and oral communication. Strong attention to detail and orientation to produce high quality work products. Capable of using spreadsheet, word processing and standard Microsoft software. Ability to work with and collaborate with a multi-disciplinary team. RTX Corporation 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 Systems, Pratt & Whitney, and Raytheon. Its 185,000 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, VA. Typically requires: A University Degree or equivalent experience and minimum 10 years prior relevant experience, or An Advanced Degree in a related field and minimum 7 years experience Engineering/Other Technical Positions: Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience unless prohibited by local laws/regulations. 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 132,400 USD - 251,600 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

Keywords: RTX, Concord , SD&I - Sr. Principal Mechanical Engineer, Engineering , Marlborough, New Hampshire