Senior Mechanical Design Engineer

Simplexity Product Development•North Reading, MA
•$135,000 - $165,000•Onsite

About The Position

As a Senior Mechanical Design Engineer, you will work with teams designing subsystems for products, tools, and equipment, including robotics, mechanisms, and biotech instrumentation. The role requires strong command of mechanical engineering fundamentals and the ability to apply them to create simple, reliable designs. Responsibilities vary by project and include designing and integrating complex mechanical systems, analyzing and prototyping designs, and collaborating across disciplines and with clients and external partners. This role suits someone with a strong technical background, technical leadership experience, and a history in product development consulting. The position initially requires onsite work at a Simplexity client site in North Reading, Massachusetts. Simplexity describes its teams as close-knit and collaborative and says employees typically complete quality work in 40–45 hours per week while owning their work-life balance.

Requirements

  • BS or MS in Mechanical Engineering from an accredited four-year university.
  • 10+ years of relevant professional engineering experience.
  • Proficiency in SolidWorks or an equivalent CAD package; SolidWorks is highly preferred.
  • Thorough understanding of 2D drawings, preferably with strong GD&T skills based on ASME Y14.5, and how drawings apply to design and manufacturing.
  • Knowledge of manufacturing processes and design considerations, including injection molding, sheet metal, machining, and rapid prototyping.
  • Knowledge of assembly and alignment methods, including screw joints, snap fits, dowel pins, and heat-staking.
  • Ability to root-cause system-level defects.
  • Experience designing and integrating complex systems with cross-functional teams, including electrical, firmware, software, and systems engineers.
  • Strong organizational and analytical skills, attention to detail, and ability to plan and prioritize effectively.
  • Highly motivated, with demonstrated ability to work independently with minimal supervision.
  • Clear communication and detailed report-writing skills.
  • Positive attitude and focus on client success.
  • Ethical and honest in every part of the job.

Nice To Haves

  • Experience with mechatronics and electro-mechanical systems, including stepper and DC motors, solenoids, gear and belt drives, linear actuators, bearings, sensors, and electronics.
  • Product development consulting experience with clients.
  • Experience using a CAD PDM system to manage CAD files.
  • Robotics, instrumentation, and test equipment design experience.
  • Pneumatic and/or hydraulic system design experience.
  • Medical device experience, including work within a medical quality system.
  • Experience with Finite Element Analysis, Computational Fluid Dynamics, or other simulation packages.

Responsibilities

  • Architect, design, and integrate complex mechanical systems.
  • Communicate design concepts using block diagrams, rough CAD, schematics, and sketches.
  • Design solutions using custom, semi-custom, and off-the-shelf parts, including injection-molded, machined, 3D-printed, and sheet-metal components.
  • Perform analytical studies using engineering principles such as force and energy balances, structural calculations, mechanical vibration, tolerance analysis, and power transmission.
  • Manage large 3D CAD assemblies.
  • Generate and maintain an organized bill of materials.
  • Create 2D drawings to ASME Y14.5 GD&T standards.
  • Quickly prototype design concepts, test them against specifications, and iterate.
  • Collaborate with engineers across disciplines.
  • Select manufacturing methods for prototyping and production, and design components accordingly.
  • Prioritize technical issues on designs and drive them to resolution.
  • Communicate regularly with clients and project management about project status, issues, design decisions, and risks.
  • Coordinate with external partners, including industrial design and contract manufacturing firms.
  • Work onsite at client facilities in the local area, such as North Reading, Massachusetts.
  • Conduct or inform simulations as needed, including structural FEA, thermal FEA, and CFD.

Benefits

  • Medical, dental, and vision healthcare plan fully paid for employees and partially paid for dependents.
  • 401(k) plan with company match.
  • Short- and long-term disability, AD&D, and life insurance.
  • Paid maternity/new parent leave.
  • 11 paid holidays.
  • Three weeks of paid time off per year, increasing after 2, 5, and 9 years of service.
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