Mechanical Engineer III

Evolv Technologies Inc.•Waltham, MA

5d•$114,000 - $184,000•Onsite

About The Position

The Mechanical Engineer III will take hands-on ownership of components and subassemblies throughout the product lifecycle—from early concepts and rapid prototypes through design validation, production tooling, release, and continuous improvement. Using SolidWorks and Arena PDM, you’ll create reliable, manufacturable designs with a strong focus on plastic injection molding and integrated electromechanical systems. You’ll work closely with electrical engineering, firmware, industrial design, supply chain, quality, and manufacturing to solve complex design challenges and turn ideas into products that perform reliably in demanding, real-world environments. This is an opportunity to sharpen your technical craft, expand your ownership, and see your work deliver meaningful customer impact at scale.

Requirements

Bachelor’s or master’s degree in Mechanical Engineering or a related field
4+ years of experience in mechanical design of electromechanical products, preferably in consumer electronics, industrial, or security systems
Proficiency with SolidWorks or an equivalent CAD system; PDM experience preferred
Understanding of processes and part design for plastic injection molding, sheet metal, and machined parts
Understanding of processes for molding large plastic parts, such as RIM, structural foam, or structural web molding
Knowledge of DFM/DFx, tolerance stack-up analysis, GD&T, materials selection, and expected variation in injection-molded, sheet-metal, and machined parts
Experience with Arena PDM or a similar product lifecycle management system
Experience working with suppliers, global contract manufacturers, and mid-volume production environments
Familiarity with structural, thermal, and vibration analysis using FEA or other simulation tools
Experience with modern prototype fabrication such as 3D printing
Strong cross-functional collaboration, communication, documentation, and presentation skills
A portfolio of professional or personal work with a brief description of key challenges and individual contributions
Experience with basic hand tools for concept and prototype assembly

Nice To Haves

Experience with highly constrained electronics packaging and thermal management
Familiarity with design for reliability, FEA, and testing methodologies for mechanical reliability
Experience in regulated industries such as medical devices, automotive, or security technology
Experience using shop tools: drill, end mill, CNC router, and 3D printers

Responsibilities

Execute mechanical design and development for new and existing products, with an emphasis on injection-molded plastic components
Create detailed 3D models, assemblies, and production-ready drawings in SolidWorks or an equivalent CAD system
Translate product requirements into mechanical design specifications and contribute to design reviews and technical decisions
Design precision electromechanical assemblies and enclosures, and manage the full product lifecycle from concept and prototyping through production tooling and sustainment
Apply design for manufacturability and design for reliability principles to improve robustness, quality, yield, and long-term product performance
Perform tolerance analysis, structural and thermal validation, and root-cause analysis on mechanical issues
Collaborate with electrical engineering, firmware, industrial design, supply chain, quality, and manufacturing partners to ensure cohesive system integration
Work directly with contract manufacturers and suppliers, including international partners, to improve manufacturability and yield
Support tooling, fixture, test-equipment design, prototype builds, factory validation, test plans, failure analysis, and design-transfer activities
Manage and maintain CAD data, bills of materials, engineering change orders, test plans, and other engineering documentation using Arena PDM
Ensure compliance with Evolv quality-system and product-certification standards, including UL and CE requirements, and support risk assessments and DFMEA development
Research emerging materials, manufacturing processes, and design methods; propose and prototype creative solutions that improve performance and cost efficiency
Contribute to a collaborative, iterative engineering culture grounded in precision and curiosity