Senior Mechanical Test Engineer – Manufacturing Fixtures

Whoop; Boston (MA); On-site; USD 150,000 - 195,000; Full time

Job summary

WHOOP is seeking a Senior Mechanical Engineer (Manufacturing Test) to design and deploy mechanical fixtures for reliable testing across development and mass production. You will work with contract manufacturers, apply GD&T and tolerance analysis, and ensure production-ready fixtures and documentation.

The role requires 5+ years of hardware design for manufacturing, strong SolidWorks and Arena PLM experience, and the ability to travel up to 15%. Based in Boston, MA, with relocation if needed.

Qualifications

• Bachelor's degree in Mechanical Engineering, Mechatronics, or a related technical discipline.
• 5+ years of experience designing complex mechanical systems, fixtures, automation equipment, or similar hardware for manufacturing or production environments.
• Advanced proficiency with 3D CAD and engineering drawings; SolidWorks experience is strongly preferred
• Experience developing mechanical fixtures or equipment from requirements through prototype, validation, release, and production support
• Experience co-developing mechanical systems with contract manufacturers, suppliers, or external engineering partners, including technical direction and design review
• Experience creating and maintaining production engineering documentation, revision control, and PLM systems such as Arena
• Strong mechanical debugging and root-cause analysis skills, with experience using data to characterize and improve fixture performance
• Working knowledge of electrical systems, wiring, instrumentation, and PCBAs sufficient to integrate and debug electromechanical test fixtures
• Experience using manufacturing data and statistical methods to evaluate repeatability, variation, and fixture capability; familiarity with SPC is preferred
• Strong project ownership, communication, and cross-functional collaboration skills, with the ability to independently drive complex fixture-development projects
• Familiarity with Python or other scripting languages for engineering analysis, automation, or debugging is a plus
• Ability to travel up to 15%, both domestically and internationally
• Strong commitment to leveraging AI tools in day-to-day tasks, ensuring AI-assisted work aligns with the same high-quality standards as personal contributions

Responsibilities

• Drive mechanical fixture development for complex manufacturing test applications from early concept through validation, production deployment, and sustaining, partnering closely with contract manufacturers on design and execution
• Translate test and product requirements into robust fixture designs, making appropriate tradeoffs between performance, repeatability, complexity, cost, cycle time, and maintainability
• Design fixtures directly where appropriate and provide technical direction and design review for solutions co-developed with manufacturing partners
• Apply strong mechanical engineering principles including tolerance analysis, GD&T, material selection, datum strategy, alignment, DFM, and manufacturing process selection to review and validate fixture designs
• Collaborate with contract manufacturers throughout design, sourcing, fabrication, qualification, and production readiness, including on-site support during NPI and product builds
• Lead fixture debugging and root-cause investigations, using structured problem solving and data to resolve issues related to tolerance, alignment, wear, loading, repeatability, and fixture performance
• Ensure production-ready CAD, drawings, BOMs, assembly instructions, and fixture specifications are accurately maintained through established PLM and change-control processes
• Collaborate across engineering teams to define fixture requirements and drive improvements to fixture design, qualification, maintenance, and development practices

Skills

Mechanical design

GD&T

Tolerance analysis

Project ownership

Cross-functional collaboration

Education

Bachelor's degree in Mechanical Engineering

Tools

SolidWorks

Arena PLM

3D CAD

Engineering drawings

Job description

WHOOP is seeking a Senior Mechanical Engineer (Manufacturing Test) to design and deploy mechanical fixtures for reliable testing across development and mass production. You will work with contract manufacturers, apply GD&T and tolerance analysis, and ensure production-ready fixtures and documentation.

The role requires 5+ years of hardware design for manufacturing, strong SolidWorks and Arena PLM experience, and the ability to travel up to 15%. Based in Boston, MA, with relocation if needed.