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RTX

Senior Principal Mechanical Engineer

United States

The salary range for this role is 132,400 USD - 251,600 USD.

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Job details

Pay: The salary range for this role is 132,400 USD - 251,600 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 11, 2026

Original job description

Date Posted:

2026-11-11

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.

Mechanical Engineering is searching for an experienced Senior Principal Design Engineer to work in the Radar Design Department.

This onsite role will be based in Marlborough, MA 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.
Program support and development from early development through transition to production.
Lead the mechanical development of radar systems and components that achieve the performance requirements at the system-level.
Provides technical conscience, challenged with making sure the product and process meet appropriate standards and requirements.
Ensures balance with risk conditions and constraints while advising leadership.
Visible and accountable for technical decisions.
Frequent technical contact with the customer and senior personnel regarding requirements, significant technical commitments, IRAD, future technical needs, etc.
You will also be responsible for meeting cost, schedule, quality, and performance requirements for the finished product.
Work with minimal direction or supervision, while exercising considerable latitude in determining the technical objectives of the assignment.
Periodic travel will be required to support collaboration, and hardware build and test.

Qualifications You Must Have

Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience or an advanced degree in a related field and minimum 7 years’ experience.
Experience in the design of mechanical design for military or aerospace or commercial applications.
Experience with innovative mechanical design and trouble shooting skills.
Experience with phase array structures, and/or hardware packaging, and/or array integration for military or mechanical or commercial applications in a collaborative environment.

Qualifications We Prefer

Experience with ANSI drawing standards and/or first order or structural analysis techniques.
Experience in Metrology.
Experience in ruggedized or military integration.
Experience with CREO(Pro/E) or similar 3D solid modeling software.
Familiarity with the design and manufacturing processes of CCAs, metal housings, sheet metal, or assembly operations.
Technical background with high technical aptitude.
Leadership skills and project management for strategic decisions.
Working knowledge of Microsoft Office (Word, Excel, PowerPoint).
Excellent 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 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.

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Jobs in the United States