2026 ADGE Sr Principal Mech Engineer - On Site

RTX•Tewksbury, MA

2d•$132,400 - $251,600•Onsite

About The Position

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. Department Overview: The Air Defense Ground Equipment Mechanical Design Department is responsible for the mechanical design, development, and integration of critical defense platform systems. This includes radar and communications shelters, electronic subsystems, launchers, hardware integration, and system interconnects. Role is an On-Site role in Tewksbury, MA/Andover, MA

Requirements

Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience or an Advanced Degree in a related field and minimum 7 years’ experience.
Mechanical equipment design and development experience, preferably in defense/military environments
Proven engineering team leadership with accountability for cost, schedule, and technical performance; project budgeting and scheduling experience
Prior Experience collaborating within Integrated Product Teams (IPTs) and cross-functional organizations, including customer engagement
Experience with hands-on mechanical design, from trade studies and concept development through production transition and supplier support
Experience conducting RCCA, driving cost reduction initiatives, and producing technical documentation/white papers
Broad expertise in mechanical design, materials, manufacturing processes, CAD, and PDM systems
The ability to travel domestically and internationally
U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
Active and existing security clearance required after day 1

Nice To Haves

Advanced degree in Mechanical Engineering or related hardware systems field
Electronic packaging design experience (subsystems, modules, CCAs, PWBs, interconnects for RF/digital/power)
Design, fabrication, and integration of electronic assemblies, shelters, racks, and PDUs
Knowledge of military/commercial specifications and ASME Y14.5 GD&T
Experience with ECAD processes, interconnects, cables/harnesses, and material selection/finishes
Proficiency in Creo CAD, Windchill PDM (or similar), and configuration/change management
Skilled in Microsoft Office with strong communication and technical writing abilities
Self-driven team player able to manage multiple priorities and travel as needed

Responsibilities

Lead execution of major programs and mid- to large-scale cross-functional engineering teams across all development phases
Serve as SME and technical liaison to programs/IPTs, ensuring stakeholder alignment
Oversee technical performance of design teams and provide lifecycle engineering guidance
Lead proposal efforts, EAC activities, and manage schedule, cost, and technical commitments
Drive TDP development, peer reviews, and hardware engineering process improvements
Perform complex mechanical design, development, and documentation for defense systems
Support product integration with domestic/international factories and suppliers
Collaborate with multidisciplinary teams, Chief Engineers, and suppliers to deliver robust, production-ready solutions