Mechanical Engineer I (Onsite)

RTX (Raytheon); Tewksbury (MA); On-site; USD 65,000 - 90,000; Full time

Job summary

RTX in Massachusetts is seeking a mechanical engineer to contribute to mission-critical defense systems across radar, missile, and command-and-control platforms. You will participate in the full product lifecycle from concept through prototyping, testing, and factory support in a collaborative, cross-disciplinary team onsite in Tewksbury.

The role requires a STEM degree and hands-on CAD experience; DoD Secret clearance is required to start, with eligibility for interim clearance.

Qualifications

• Bachelor's degree in a STEM field obtained by start date.
• Hands-on CAD experience generating 3D models and 2D drawings.
• Experience with mechanical design through coursework or projects.
• U.S. citizenship and ability to obtain DoD security clearance.

Responsibilities

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

Skills

Parametric 3D CAD

Mechanical design

Prototyping & testing

Engineering analysis

Education

Bachelor's degree in STEM

Tools

CAD tools: SolidWorks/Creo/Inventor/CATIA/Siemens NX

GD&T knowledge

Job description

Date Posted: 2026-10-02

Country: United States of America

Location: US-MA-TEWKSBURY-TB1 ~ 50 Apple Hill Dr ~ ASSABET BLDG

Position Role Type: Onsite

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

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

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.

Qualifications You Must Have

• Bachelor's 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

• Bachelor'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.