Senior Mechanical Engineer

NPAworldwide; Foxborough (MA); On-site; USD 125,000 - 145,000; Full time

Benefits offered by this job

Health, dental, vision insurance

401(k) and paid time off

Bonus eligibility

Job summary

NPAworldwide is seeking a Mechanical Engineer to own enclosure, chassis, and thermal design for rugged military-grade hardware in the Greater Boston area. You will lead mechanical development from concept through production, collaborating with electrical, firmware, manufacturing, and QA teams to ensure robust, field-ready solutions.

The role emphasizes hands-on prototyping, rapid iteration, and direct accountability for design decisions that impact performance in harsh environments and military

Qualifications

• Bachelor's degree in Mechanical Engineering or equivalent.
• 5+ years of mechanical design experience, including launch of hardware from prototype to production.
• Strong SolidWorks experience across parts, assemblies, sheet metal and drawings.
• Experience with thermal/structural analysis using FEA tools (SolidWorks Simulation/ANSYS).

Responsibilities

• Own enclosure, chassis, thermal, and cable design for MIL-STD-810/461 tested systems.
• Lead mechanical design on assigned products with cross-functional teams.
• Create production-ready drawings with GD&T and BOMs; support NPD gates and ECOs.
• Apply DFM/DFA, collaborate with vendors and manufacturing to speed development.

Skills

3D CAD

SolidWorks

FEA

Rapid prototyping

GD&T

DFM/DFA

Electronics packaging

EMI/EMC design

Education

Bachelor's degree in Mechanical Engineering

Master's degree in Mechanical Engineering

Tools

Jira

Job description

Job Description

MechanicalEngineer-Defense & Industrial Hardware Greater Boston, Massachusetts

Job Description

MechanicalEngineer-Defense & Industrial Hardware Greater Boston, Massachusetts

Want to own a design from first sketch to fielded hardware, without layers of approval between you and the production floor? In this role, youll design the mechanical systems behind rugged, mission-critical electronic hardware used by the U.S. military and leading defense contractors. As part of a small engineering team, youll take products from concept through prototype to production launch then see your designs at work in the field.

About The Company

Our client is an established, privately held company with fewer than 100 employees, located in the Greater Boston area. Engineering and manufacturing share one site, so engineers work side by side with the people who build what they design.

The company operates with an entrepreneurial, can-do mindset. Every member of its close-knit engineering group is hands‑on, and the team works collaboratively, with a strong sense of purpose and ownership. Engineers share work across programs and cross‑train, so engineers can support one another and broaden their skills along the way.

WHY ENGINEERS JOIN US - Real ownership. Youll be the mechanical lead on your products, not one contributor on a narrow subsystem.

• A short path from CAD to hardware. With design and manufacturing under one roof, you can prototype, build, and test quickly.
• Breadth. Thermal, structural, sealing, EMI, and harness design all fall within one role, so no two weeks look the same.
• Work that matters. Your designs support equipment used by U.S. service members in demanding environments.
• A voice that counts. On a small team, your ideas shape both the products and how theyre built.

What Youll Do

Youll own enclosure, chassis, thermal, and cable design for products that must pass MIL-STD-810 environmental and MIL-STD-461 EMI testing.

Responsibilities Include

Design & Analysis

• Design enclosures, chassis, brackets, and sheet-metal and machined parts for military-grade electronic systems, from concept through production release
• Solve thermal management challenges in sealed, space-constrained enclosures (heat sinks, conduction paths, airflow, and thermal interface materials), and verify designs through analysis and test
• Design for shock and vibration, environmental sealing (gaskets, connectors, and ingress protection), and EMI shielding and grounding
• Partner with electrical engineers on PCBA mechanical integration, component placement, and electronics packaging
• Design and document cable and wire-harness assemblies

Prototype & Test

• Shorten design cycles with rapid prototyping (3D printing and sheet metal), SolidWorks, and thermal/structural FEA; build and test prototypes hands‑on
• Plan and support qualification testing to MIL-STD-810 and MIL-STD-461, including test fixtures, test plans, and root-cause

analysis of failures

Lead & Deliver

• Lead mechanical design on assigned products, collaborating with electrical, firmware, manufacturing, and quality engineers, as well as suppliers and customers
• Create production-ready drawings with GD&T, bills of materials, and design documentation; support new product development (NPD) gate reviews and engineering change orders (ECOs)
• Apply design for manufacturing and assembly (DFM/DFA); work with vendors, partners, and the production floor to speed development, reduce cost, and improve build quality; develop manufacturing aids and fixtures
• Travel to supplier or customer sites as business requires (less than 10%)

Qualifications

WHAT YOU BRING- REQUIRED | PREFERRED |Bachelors degree in Mechanical Engineering

5+ years of mechanical design experience, including launching hardware products from prototype into production

Strong 3D CAD skills; SolidWorks experience (parts, assemblies, sheet metal, and drawings) strongly preferred

Thermal or structural analysis experience (ideally both) using FEA tools such as SolidWorks Simulation or ANSYS

Rapid prototyping experience, particularly with sheet metal and the mechanical integration of PCBAs

Hands‑on 3D printing experience with a range of materials

A portfolio, publications, or other work samples that demonstrate your design skills

Working knowledge of GD&T and design for manufacturing

U.S. person status as defined by ITAR (U.S. citizen, lawful permanent resident, or person granted asylum or refugee status); this position involves access to technical data controlled under the International Traffic in Arms Regulations

Preferred

Masters degree in Mechanical Engineering

Experience beyond the five-year minimum, particularly with defense or industrial hardware

Design of rugged or harsh-environment electronics enclosures (shock, vibration, sealing, and thermal)

Electronics packaging, including high-power or high-heat-load components

EMI shielding and grounding design

Design and testing to MIL-STD-810, MIL-STD-461, or similar defense or aerospace standards

Cable and wire-harness design

Shop & Tool Skills

Basic shop and assembly skills, including CNC machining and simple fabrication

A plus: familiarity with digital multimeters (DMMs), oscilloscopes, soldering, and breadboarding

A plus: familiarity with Jira

Why Is This a Great Opportunity

Very well managed company; company culture is innovative, practical and solutions focused!

Compensation & Benefits

Base salary: $125,000$145,000, commensurate with experience

Bonus eligibility

Health, dental, and vision insurance

401(k) and paid time off

Salary Type: Annual Salary

Salary Min: $ 125000

Salary Max: $ 145000

Currency Type: USD