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Principal Mechanical Engineer

RTX
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Portsmouth, RI, USA
Sep 21, 2026

Date Posted:

2026-08-20

Country:

United States of America

Location:

US-RI-PORTSMOUTH-PS3 ~ 1847 W Main Rd ~ NIMITZ WEST 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.

Raytheon’s Hardware Mechanical Engineering team leads the mechanical hardware design, development and production of critical defense systems. The HWE Team uses state-of-the-art tools, processes, technology, and Raytheon’s CORE principles. HWE’s capabilities encompass a broad range of technical disciplines which include engineering, manufacturing, technical services, materials, processes, analysis, test, and documentation.

The ideal candidate for Principal Mechanical Design Engineer will bring a blend of technical ability, experience in mechanical hardware design, system integration skills, and a strong background in program execution whether design and development or production support. As a key contributor on a mechanical or cross-functional engineering team, you will take responsibility for component and assembly modeling, documentation, design changes, and releases processes. This position is ideal for a mid-career mechanical engineer who is looking to grow their skills in design, manufacturing, and technical problem-solving within a highly collaborative and mission-focused environment.

What You Will Do

Design:

  • Developing innovative technical solutions to a wide range of complex challenges spanning the entire product lifecycle, including proposal, advanced development, design, cooling, manufacturing, integration, and testing of radars, support equipment and electronics for military programs.

  • Perform tolerance analyses to ensure form, fit, and function are as intended by design for the use-application.

  • Lead small teams utilizing strong mechanical hardware design experience and knowledge in a fast-paced collaborative environment with ruggedized structures, interconnects, cooling, electronics packaging, tooling and/or array integration.

  • Provide support for product integration and efforts in both domestic and international factories and supplier locations to assess requirements compliance.

Teaming/Communication:

  • Collaborate with cross-functional teams including other engineering disciplines, operations, supply chain, quality, and external suppliers to resolve technical challenges and develop effective design solutions.

  • Independently manage tasks and deliver on schedule, budget, and technical goals.

  • Participate in design reviews and conduct trade studies to support informed, sound engineering decisions.

  • Mentor and guide less experienced engineers, contributing to team development and technical growth.

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 creation, review and interpretation of technical documentation utilized in the development or production of hardware or tooling products.

  • Experience in mechanical design, advanced design development, manufacturing or tooling processes, or related areas.

  • Experience in the development, creation, release, or updates of engineering drawings utilizing a 3D CAD design tool.

Qualifications We Prefer

  • Proven mechanical design ability in a production or advanced development environment.

  • Experience in design, fabrication, or integration of Electronics Packaging, design and development of Electronic Systems, including interconnects, power distribution, cooling, RF or tooling products.

  • Technical Data Package creation, change notice processing including communication of required functional and performance requirements.

  • Experience using CREO CAD design and documentation tools or similar 3D solid modeling software with a configuration and data management environment.

  • Experience in Geometric Dimensioning and Tolerancing.

  • Experience with cost and/or schedule reporting or proposal development.

  • Highly detail-oriented with a demonstrated ability to work effectively within cross-functional teams.

  • Familiarity with Military and/or Commercial Specifications and requirements

  • Willingness to travel (domestic and international)

  • Advanced degree in mechanical engineering, aerospace hardware systems design

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.

  • Work Schedule: 9/80 schedule (every other Friday off)

  • Relocation Eligible - relocation assistance is available for this position

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.

  • This position requires onsite work in Portsmouth, RI:  https://careers.rtx.com/global/en/raytheon-portsmouth,-ri

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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Job ID

01868215

Security Clearance

SECRET
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