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Principal Mechanical Engineer

Job in Portsmouth, Newport County, Rhode Island, 02871, USA
Listing for: Raytheon
Full Time position
Listed on 2026-08-24
Job specializations:
  • Engineering
    Mechanical Engineer, Engineering Design & Technologists, Manufacturing Engineer, Systems Engineer
Job Description & How to Apply Below

Principal Mechanical Design Engineer

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'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

  • 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
Position Requirements
5+ Years work experience
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