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RTX

Principal Mechanical Engineer

United States

The salary range for this role is 107,500 USD - 204,500 USD.

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Job details

Pay: The salary range for this role is 107,500 USD - 204,500 USD.
Experience: 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.
Posting language: English
Posted: Nov 10, 2026

Original job description

Date Posted:

2026-11-10

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

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 for leading 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. We are looking for electronic packaging, structures, and general mechanical lead candidates to join our team.

This Principal Engineer is an on-site role based in Marlborough, MA or Tewksbury, MA.

What You Will Do

Utilize mechanical hardware design experience and knowledge with ruggedized structures, interconnects, electromechanical development, cooling, or array integration of phase array radars/electronics for multiple military programs.
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.
Employing transition-to-production practices with the ability to lead a design release into production.
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.
Collaborate frequently with cross functional personnel, 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.
Experience in the design of radar architecture or electronics packaging for military or aerospace or commercial applications.
Experience with GD&T (Geometric Dimensioning & Tolerances).

Qualifications We Prefer

Experience with ANSI drawing standards and/or first order or structural analysis techniques.
Experience with design of military standards.
Collaboration and leadership skills.
Experience with CREO (Pro/E) or similar 3D solid modeling software.
Cognizant of machine and designing capabilities or have direct experience in 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.
Working knowledge of Microsoft Office (Word, Excel, PowerPoint)
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

A total rewards package that goes above and beyond with compensation; healthcare, wellness, and work/life benefits; career development and recognition programs. Some of the benefits we offer include parental (including paternal) leave, flexible work schedules, achievement awards, educational assistance and child/adult backup care.
Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Trust, Respect, Accountability, Collaboration, Innovation, and Safety.
Relocation assistance available.

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.
This position requires 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: https://www.state.gov/m/ds/clearances/c10978.htm

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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More about this job

Skills

Research
Design hardware
Problem solving
Military weaponry
Packaging
Product life-cycle
Collaboration
Leadership
Three-dimensional 3D solid modeling
Assembly
Manufacturing processes
Microsoft Office
Microsoft Word
Microsoft Excel
Microsoft PowerPoint
Interpersonal skills
Aerospace engineering

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Work requirements

Jobs in the United States