Principal Mechanical Engineer

Date Posted:

2026-09-28



Country:

United States of America



Location:

US-MA-TEWKSBURY-TB1 ~ 50 Apple Hill Dr ~ ASSABET BLDG



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 freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

The Air Defense Ground Equipment Mechanical Design Department is responsible for the mechanical design, development, and integration of critical defense platform systems.

This includes radar and communications shelters, electronic subsystems, launchers, hardware integration, and system interconnects.

We are currently seeking a motivated and driven Principal Mechanical Engineer to join our Ground Equipment Design Team. The ideal candidate will bring a blend of technical expertise, mechanical hardware design experience, system integration skills, and a strong background in program execution and production support. As a key contributor on a mechanical or cross-functional engineering team, you will be responsible for component and assembly modeling, documentation, design changes, and release processes.

Role is an On-Site role in Tewksbury, MA/Andover, MA

What You Will Do 

• Perform ME design, development, and documentation of components, subassemblies, and major end items
• Oversee small to mid-sized cross-functional engineering teams as the technical execution lead across all phases—from proposal generation and program initiation
• Serve as the technical focal point for mechanical or cross-functional teams
• Provide support for product integration with domestic and international factories and suppliers.
• Collaborate with engineering and non-engineering disciplines, and suppliers, to resolve technical challenges
• Work independently with minimal supervision while ensuring schedule, cost, and technical commitments are met.
• Support and participate in design peer reviews, and conduct trade studies
• Apply ME knowledge to solve problems in a fast-paced, team-oriented environment.
• Mentor and guide junior engineers, fostering growth and knowledge sharing within the team.

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 spanning concept development, detailed design, transition to production, and sustainment.
• Experience in mechanical design, material selection, and manufacturing processes.
• Experience in CAD design tools, ProE and CREO, including Large Assembly Management.
• Experience with Product Data Management (PDM) systems

Qualifications We Prefer 

• Advanced degree in Mechanical Engineering or related hardware systems field
• Design and integration of electronic/shelter assemblies and power distribution equipment
• Troubleshooting electromechanical systems
• Experience with interconnects, cables, harnesses, and CNC
• Proficiency in ASME Y14.5 GD&T
• Structural design and analysis experience
• Understanding of manufacturing systems and electromechanical production environments
• Experience in cross-functional IPT collaboration and engineering risk/proposal management
• Familiarity with EVM/EAC and willingness to travel (~10%)

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 Eligibility

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.
• Role is an On-Site role in Tewksbury or Andover, 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 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.

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