Principal Mechanical Design Engineer – CAS Hardware Design

Date Posted:

2026-10-09

Country:

United States of America

Location:

US-RI-PORTSMOUTH-PS1 ~ 1847 W Main Rd ~ NIMITZ 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.  

We are seeking a Mechanical Design Engineer to join our team, supporting the development and execution of Common CAS hardware within the PCAS organization. This onsite role, based in Portsmouth, Rhode Island, will involve collaboration with engineering and other functional teams to deliver innovative solutions for defense and aerospace applications.

What You Will Do

• Lead and contribute to the design, modeling, analysis, and documentation of mechanical systems for CAS hardware.
• Support the development and technical execution of the Common CAS product line.
• Provide technical oversight and resolve engineering challenges throughout the product lifecycle.
• Ensure adherence to engineering processes, standards, and best practices.
• Collaborate with teams across Engineering, Operations, Supply Chain, Quality, and Program Management.
• Participate in resource planning, design reviews, manufacturing readiness, and integration activities.
• Communicate risks, progress, and technical status to leadership and program stakeholders.
• Contribute to continuous improvement initiatives and product affordability efforts.

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 supporting or leading technical activities on Department of Defense (DoD) or aerospace programs.
• Experience with mechanical design tools and engineering processes.

Qualifications We Prefer

• Master’s degree in a relevant technical discipline.
• Experience with CAS hardware, actuation systems, or advanced mechanical assemblies.
• Experience building collaborative networks and leading teams through technical challenges.
• Experience with proposals, risk management, and Control Account Management (CAM) responsibilities.
• Presentation, communication, and technical writing skills.
• Program Management experience or certification.
• Active DoD Secret Clearance.

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!

• 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 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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