Principal Mechanical Design Engineer

RTX (Raytheon); Sudbury (MA); On-site; USD 140,000 - 190,000; Full time

Job summary

RTX (Raytheon) in Marlborough/Tehksbury, MA, onsite, is seeking an experienced Principal Mechanical Engineer to lead mechanical design for radar systems across defense programs. The role emphasizes hardware design, integration, and cross-disciplinary collaboration.

You will guide projects through concept, design, development, build, and test, manage a small team when needed, and ensure producibility and compliance with military standards.

Qualifications

• Experience in hardware design for military/aerospace radar systems.
• Knowledge of GD&T applied to complex assemblies.
• Ability to lead design teams and support transition to production.

Responsibilities

• Utilize mechanical hardware design experience with ruggedized structures and cooling for phased array radars/electronics.
• Develop technical solutions across the product lifecycle from proposal to test and production.
• Lead design release into production and ensure standards compliance.
• Provide technical guidance and remove roadblocks to meet cost, schedule, quality, and performance.
• Work with minimal supervision while setting technical objectives.
• Lead a small team of mechanical engineers when required.
• Collaborate with cross-functional teams across engineering, operations, and programs.

Skills

Radar design

GD&T

System integration

Mechanical design

Education

STEM degree

Advanced degree in Mechanical/Electrical/Aerospace Engineering

Tools

CREO (Pro/E)

Job description

Date Posted: 2026-10-05

Country: United States of America

Location: US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1

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 freedom and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

The Radar Mechanical Design Department leads mechanical design, development, and integration of some of the most innovative land-based and shipboard radars in the world. This includes phased array radar systems, electronic modules, pedestals, and power and cooling systems. The department comprises individuals with technical expertise and experience in hardware design, integration, and production support.

We have an opportunity for an experienced Principal Mechanical Engineer to support our radar development programs. This person will be responsible for leading mechanical teams in all phases of our design cycles, from concept development through design, development, building and tests. Key requirements for this position include proven problem-solving skills and experience in hardware design and integration, engineering analysis, and mechanical drawing creation with military hardware. Individuals will interface and collaborate primarily with other engineering disciplines, as well as operations, systems, quality and program offices.

This Principal Engineer is an on-site role based in Marlborough or Tewksbury, MA.

What You Will Do

• Utilize mechanical hardware design experience and knowledge with ruggedized structures, interconnects, electromechanical development, cooling, or array integration of phase array radars/electronics for multiple military programs.
• Develop technical solutions to a wide range of complex problems related to the entire product life cycle including proposal, design, manufacture, integration and test of phase array radars/electronics for multiple military programs.
• Employ transition-to-production practices with the ability to lead a design release into production.
• Provide technical conscience, challenged with making sure the product and process meet appropriate standards and requirements while helping to remove roadblocks.
• Work with minimal direction or supervision, while exercising considerable latitude in determining the technical objectives of the assignment while meeting cost, schedule, quality, and performance requirements for the finished product.
• Lead a small team of mechanical engineers when required.
• Collaborate frequently with cross-functional personnel, on significant technical matters often requiring coordination between organizations.

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 design of radar architecture or electronics packaging for military or aerospace or commercial applications.
• Experience with GD&T (Geometric Dimensioning & Tolerances).

Qualifications We Prefer

• Experience with ANSI drawing standards and/or first order or structural analysis techniques.
• Experience with design to military standards.
• Experience with CREO (Pro/E) or similar 3D solid modeling software.
• Cognizant of machine and designing capabilities or have direct experience in manufacturing and assembly support role for producibility.
• Familiarity with the design and manufacturing processes of CCAs, mechanical/RF components, metal housings, structures, and electronics assemblies.
• Working knowledge of Microsoft Office (Word, Excel, PowerPoint).
• Excellent verbal and written communications and interpersonal skills when working with team members and customers.
• Advanced degree in Mechanical, Electrical or Aerospace Engineering.

What We Offer

A total rewards package that goes above and beyond with compensation; healthcare, wellness, and work/life benefits; career development and rec