Find & Apply For Mechanical Engineer Jobs in Portsmouth, New Hampshire

Job Description Date Posted:

2026-10-02

Country:

United States of America Location:

US-RI-PORTSMOUTH-PS1

~ 1847 W Main Rd ~

NIMITZ BLDG

Position Role Type:

Onsite Security Clearance Type:

DoD Clearance:

Secret Security Clearance Status:

Ability to obtain

INTERIM U.S.

government issued security clearance is required prior to start date Job Description Are you ready to explore the world of aerospace and defense? Do you want to learn from and collaborate with some of the greatest minds in the industry? At RTX, our internships, co-ops and full-time careers provide an exceptional foundation to work on complex problems, advance your skills and create a safer, more connected world. Discover opportunities to make a difference at RTX. 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. 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. What You Will Do Join the Raytheon Hardware Engineering Organization and contribute mechanical engineering expertise to mission-critical defense systems across radar, missile, and command-and-control platforms. In this role, you will participate across the entire product lifecycle—from initial concept design and structural/thermal analysis to rapid prototyping, design verification testing, and factory support. Working in a collaborative, cross-functional environment alongside systems, electrical, and manufacturing engineers, you will solve complex technical challenges to deliver robust, high-reliability mechanical solutions. Occasional CONUS travel to customer sites or suppliers is generally required. International and longer-duration travel assignments are available but optional.

Key Responsibilities:

Design, model, and document mechanical components, sub-assemblies, and major end items in accordance with rigorous defense system requirements. Generate and maintain parametric 3D CAD models, complex assembly hierarchies, and detailed 2D engineering drawings. Validate design fit, form, and functionality through rapid prototyping, physical testing, and engineering simulations. Support factory operations, integration facilities, and external suppliers with product manufacturing, assembly, and integration. Participate actively in design peer reviews, resolve technical action items, and conduct trade studies to inform engineering decisions. Collaborate with multi-disciplinary engineering teams to analyze and resolve mechanical hardware issues.

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 Eligible 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 the ability to obtain a 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/cleara nces/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 68,900 USD - 131,100 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.

Privacy Policy and Terms:

Click on this link to read the Policy and Terms What We Are Looking For U.S. Citizen, U.S.

Person, or Immigration Status Requirements:

Active and transferable U.S. government issued security clearance is required prior to start date.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance​ Qualifications You Must Have Masters degree in Science, Technology, Engineering, or Mathematics (STEM) discipline. Degree must be obtained by start date. Experience utilizing parametric 3D CAD software (such as SolidWorks, PTC Creo, Autodesk Inventor, CATIA, or Siemens NX) to generate 3D solid models, mechanical assemblies, and detailed 2D engineering drawings. Experience in mechanical design applied through coursework, academic research, engineering competition teams (e.g., Formula SAE, Baja, Robotics), or hands-on projects. Experience may be obtained through on-the-job experience, research, coursework, or projects. Qualifications We Prefer Master's degree in Mechanical Engineering or Aerospace Engineering. Cumulative GPA of 3.0 or higher from an ABET-accredited institution. Knowledge or application of Geometric Dimensioning & Tolerancing (GD&T) principles per

ASME/ANSI Y14.5.

Hands-on experience in rapid prototyping and mechanical fabrication, including additive manufacturing (3D printing via FDM, SLA, or SLS) or machine shop equipment (mills, lathes, drill presses, or CNC equipment). Demonstrated problem-solving aptitude applied to structural, thermal, or multi-disciplinary hardware challenges. This position is offered by the company. AeroSelect is not affiliated with the company, and your application is made directly with them. Job Details Function Aircraft Maintenance & Engineering (MRO) Sub-Function Engineering & Design Work Type Onsite Job Type Full-Time Contract Full-Time Skills CATIA SolidWorks Computer Aided Design Geometric Dimensioning and Tolerancing Machining Aeronautical Engineering Certifications Security Clearance Aircraft types cessna Location Portsmouth, United States Job

ID IEGZEE

Post a role like this. Reach pilots, cabin crew, engineers and aviation teams across Europe. Book a listing Interested in this position? You will be redirected to the company website Apply on company site