2026 ADGE Senior Mechanical Engineer – On-Site

3M HEALTHCARE; Tewksbury (MA); On-site; USD 86,800 - 165,200; Full time

Benefits offered by this job

Medical, dental, and vision coverage

401(k) match

Flexible work schedules

Employee assistance program

Scholar Program and PTO

Job summary

RTX seeks a Senior Mechanical Engineer for the Air Defense Ground Equipment Mechanical Design Department. This on‑site role is in Tewksbury or Andover, MA requiring US citizenship and eligibility for a Secret clearance.

You will design, develop, and document major end items for defense systems and serve as the technical focal point on IPTs. You will collaborate with multidisciplinary teams to resolve challenges, manage tasks to schedule and budget, and participate in reviews and trade studies to

Qualifications

• STEM degree with at least five years of relevant experience, or an advanced degree with at least three years.
• Experience spanning full product lifecycle from concept to production and support.
• Experience in mechanical design, materials selection, and manufacturing processes.
• Experience with CAD tools and product data management (PDM) systems.

Responsibilities

• Design, develop, and document components, sub‑assemblies, and major end items for defense systems.
• Serve as the technical focal point on small mechanical or cross‑functional teams within an IPT.
• Provide support for product integration in domestic and international locations.
• Collaborate across engineering, operations, supply chain, quality, and suppliers to resolve technical challenges.
• Manage tasks independently to meet schedule, budget, and technical goals.
• Participate in design reviews and conduct trade studies to support sound engineering decisions.
• Apply mechanical problem‑solving and hardware development expertise in a fast‑paced environment.

Skills

Mechanical design

Cross-functional teamwork

Technical leadership

Problem solving

Education

STEM degree

Master's degree in Mechanical Engineering

Tools

Creo CAD

Windchill PDM

ECAD development

MS Office Suite

Job description

Job Summary

Senior Mechanical Engineer – Air Defense Ground Equipment Mechanical Design Department. On‑site role in Tewksbury or Andover, MA. U.S. citizenship required and eligibility for a Secret security clearance.

Key Responsibilities

• Design, develop, and document components, sub‑assemblies, and major end items for defense systems in accordance with system requirements.
• Serve as the technical focal point on small mechanical or cross‑functional engineering teams within an Integrated Product Team (IPT) environment.
• Provide support for product integration efforts in domestic and international factory and supplier locations.
• Collaborate with cross‑functional teams—including 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.
• Apply expertise in mechanical problem‑solving and hardware development in a fast‑paced, collaborative environment.

Qualifications – Must Have

• Degree in Science, Technology, Engineering or Mathematics (STEM) with at least five years of relevant experience, or an advanced degree with at least three years of relevant experience.
• Experience spanning the full product lifecycle—from concept and detailed design through production and support.
• Experience in mechanical design, materials selection, and manufacturing processes.
• Experience with CAD tools and product data management (PDM) systems.

Qualifications – Preferred

• Master’s degree in Mechanical Engineering.
• Willingness to travel up to 10%, including international travel.
• Excellent communication, documentation, and interpersonal skills; strong leadership and mentoring abilities.
• Familiarity with military and commercial specifications, configuration‑control and change‑management processes.
• Experience in electronic packaging design and development—including subsystems, modules, CCAs, PWBs, and interconnects for RF, digital, and power systems.
• Mechanical and electromechanical skills: design, fabrication, and integration of electronic assemblies, shelters, racks, power distribution units; electromechanical troubleshooting; machined parts and CNC manufacturing; welded‑structure design and fabrication; structural analysis; GD&T per ASME Y14.5.
• Proficiency in Creo CAD, Windchill PDM, ECAD development processes, and Microsoft Office Suite (Word, Excel, PowerPoint, Project).
• Experience with interconnects, cables, harnesses, modern manufacturing systems, and reliability/failure analysis.
• Proven ability to manage complexity, deliver innovative, practical solutions on time and within budget, and prioritize multiple tasks.
• Eagerness to learn new technical challenges and familiarity with Earned Value Management, Estimate at Complete, and risk and opportunity management.

Benefits

• Salary range: $86,800–$165,200 per year.
• Medical, dental, and vision coverage.
• Life insurance, short‑term and long‑term disability.
• 401(k) match and flexible spending accounts.
• Flexible work schedules and employee assistance program.
• Employee Scholar Program, parental leave, paid time off, and holidays.
• Annual short‑term and/or long‑term incentive compensation programs (dependent on level and collective‑bargaining agreement).

Location

Tewksbury or Andover, MA. All on‑site roles require presence at the facilities.

Equal Opportunity Employer

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, veteran status, or any other applicable state or federal protected class.