Senior Principal Mechanical Engineer

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

Job Description:

Date Posted: 2026-02-03 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: Active and transferable U.S. government issued security clearance is required prior to start date.? 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: Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date 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. The Raytheon Mechanical Engineering (ME) Organization leads the mechanical hardware design, development and production of radar, sonar, torpedo, and combat system equipment. The ME Team uses state-of the-art tools, processes, technology, and Raytheon’s CORE principles. ME’s capabilities encompass a broad range of technical disciplines which include engineering, manufacturing, technical services, materials, processes, analysis, test, and documentation. 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, hardware integration, and electronic modules, pedestal and power and cooling systems. The department is comprised of individuals with technical expertise and experience in hardware design, integration, and production support. Mechanical Engineering is searching for an experienced Senior Principal Design Engineer to work in the Radar Design Department. Focused on support to cooling and hydraulic systems across radar programs and sites used in a variety of harsh environmental military applications. Phases will cross development through integration and upgrades. Focus on providing developmental, test and evaluation design solutions with potential commercial options as well as ruggedized custom cooling designs, field installation, test bed support, customer interactions and training. Must be able to lead program teams for development and testing portfolio with and frequently travel between the Northeast Facilities as well and domestic and international travel to our customer and depot sites. This position is located on-site in Marlborough or Tewksbury, MA. What You Will Do: You will be responsible for developing sound technical solutions to a wide range of complex problems related to the entire product life cycle, in particular to achieve test events in a DoD environment Lead the mechanical development of cooling and hydraulic test systems and components that achieve the performance requirements at the system-level from proposal development through testing of one-of-a-kind units and assess commonalty across the portfolio Ownership over these items across multiple contracts and spanning multiple years, including efforts critical to support future growth. Work with our programs and internal and external customers to establish cooling systems requirements and best value and best practice design options based on cost and schedule and appropriate technical data package requirements Ensures balance with risk conditions and constraints while advising leadership. This role requires a balance of skills including attention to detail, root cause analysis, customer service, and relationship building. Candidate’s ability to quickly adapt through use of technical expertise, leadership, communication skills, and responsiveness are paramount. Engage in personal technical growth and facilitate technical growth in peers and junior engineers. Help to understand what opportunities are needed to mature the organization on the technical front. Qualifications You Must Have: Typically requires a Bachelor’s in Science, Technology, Engineering, or Mathematics (STEM) and 12 years of prior relevant experience OR an Advanced STEM degree and 10 years of prior relevant experience. Experience utilizing and/or creating military cooling design specifications and trouble shooting. Interact with program counterparts as an authority on field testing, repair and training Review deliverables for soundness of technical judgment and adequacy 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: Frequent technical contact with the customer and senior personnel including requirements, significant technical commitments, commercial options, future technical needs, etc. Cognizant of suppliers’ capabilities or have direct experience field experience Work with minimal direction or supervision, while exercising considerable latitude in determining the technical objectives of the assignment. Onsite and frequent travel to customer sites will be required to lead collaboration, and hardware build, upgrade, repair, test and training Experience with CREO(Pro/E) or similar 3D solid modeling software and PDM Strong technical background with high technical aptitude Very strong verbal and written communications and interpersonal skills when working with team members and customers Broad knowledge of RTX or defense industry projects, programs or systems in order to provide enhancements within job area. 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. 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. 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, Chicopee , Senior Principal Mechanical Engineer, Engineering , Marlborough, Massachusetts