Principal Mechanical Engineer

Employer description

Date Posted:

2026-10-26 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 Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. We bring 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. Our team solves tough, meaningful problems that create a safer, more secure world.  

The Raytheon Hardware Engineering Organization leads the hardware design, development and production support of a wide breadth of air, land, sea, and space systems.  The Hardware Engineering team strives to be the premier organization for mechanical design and development through our world class people and technology - creating trusted, innovative solutions to make the world a safer place.  Hardware Engineering’s capabilities encompass a broad range of technical disciplines which include engineering, technical services, materials, processes, analysis, test, and documentation.

Within the Hardware Engineering Organization, the Undersea & Electronics Systems (UES) Department leads the mechanical design, development, and integration of a diverse set of products, including but not limited to undersea sensors and analysis, naval platforms, shipboard/ground-based processing and power equipment, and launchers. 

The UES department is looking for a full-time Principal Mechanical Engineer.  This role will be on-site and located in Portsmouth, RI. 

What You Will Do

Perform complex mechanical design, development, and documentation of components, sub-assemblies, and major end items for defense system equipment in accordance with system requirements.Lead a team of hardware engineers to develop and mature designs from initial concept to formal technical data package generation (engineering drawings, models) and culminating in initial builds, testing, transition to production, and production supportWork with limited supervision and meet commitments for assigned schedule, financial, and technical goals. Mentor and guide less experienced engineersLead efforts to develop design peer review packages, resolve action items, and conduct trade studies to make sound technical decisionsPresent technical content to senior leadership and customer representativesOccasional CONUS travel to customer sites or suppliers is generally required.  International and longer duration travel assignments may be available but optionalQualifications You Must Have

Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience unless prohibited by local laws/regulations.Experience in leading development efforts and teams with cost and schedule responsibilityExtensive experience in the maritime or defense industries, including the design /build/test of mechanical designs that operate is these environments.Extensive experience with GD&T (ASME Y14.5), Tolerance Analysis, metal fabrication (machining, sheet metal), assembly joining techniques (fasteners, rivets, inserts)Experience with CAD modeling and Engineering Documentation practices.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. 

Qualifications We Prefer

Experience in the specification, design, development, production and testing of electronics systems in maritime environments. Specific knowledge of packaging electronic equipment to meet physical and environmental constraints is preferredExtensive experience with areas of the program lifecycle from pre-proposal technical baseline development to product test and evaluationExperience managing financial and schedule performance of program level tasking. Experience and certifications in Earned Value Project Management preferredDemonstrated ability to solve difficult problems and determine root cause and corrective actions while leading a cross functional team. Experience with assessing program risk and opportunity impacts of the selected path forward is preferredStrong communication skillset with ability to articulate, in both oral and written form, to technical, non-technical and management audiences 

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.

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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