Senior Electro-Mechanical Engineer

HEN Technologies•Livermore, CA

12d

About The Position

At HEN Technologies, we’re building Physical AI for the real world—intelligent systems that sense, understand, and act in high-stakes physical environments. Our first application is transforming fire response: combining advanced fluid dynamics, IoT-enabled hardware, real-world operational data, and AI-powered decision support to help firefighters suppress fires faster, use less water, reduce fatigue, and improve safety. By connecting the physical layer of emergency response with predictive intelligence, HEN is building the infrastructure for a safer, more adaptive future. Role Overview HEN Technologies is seeking a hands-on Senior Electro-Mechanical Engineer to own the detailed mechanical design and motor integration for our next generation of nozzle systems. This engineer will be responsible for transforming product and system-level requirements into optimized, manufacturing-ready nozzle assemblies. The role will include mechanical CAD, motor and actuator selection, detailed component design, prototyping, testing, design iteration, and production documentation. This is an ideal opportunity for an engineer who enjoys solving complex mechanical problems, building and testing physical products, and taking designs from concept through manufacturing.

Requirements

Bachelor’s degree in Mechanical Engineering, Electro-Mechanical Engineering, Mechatronics, or a related engineering discipline.
At least five years of professional experience designing and developing electro-mechanical products.
Strong proficiency with professional 3D CAD and mechanical drawing tools, preferably SolidWorks.
Demonstrated experience taking mechanical designs from concept through prototype and manufacturing.
Experience selecting and integrating motors, actuators, gearboxes, bearings, sensors, or similar components.
Strong understanding of mechanical design fundamentals, including materials, tolerances, fits, fasteners, sealing, thermal considerations, and structural performance.
Experience producing detailed manufacturing drawings using GD&T.
Knowledge of common manufacturing processes and design-for-manufacturing principles.
Experience working directly with machine shops, prototype vendors, suppliers, and contract manufacturers.
Strong hands-on prototyping, testing, troubleshooting, and root-cause analysis skills.
Ability to manage detailed engineering work independently while collaborating across multiple disciplines.
Clear written and verbal communication skills.

Nice To Haves

Experience designing nozzles, fluid-handling equipment, pumps, valves, flow-control products, or pressurized mechanical systems.
Experience with motorized positioning, robotics, industrial automation, or motion-control systems.
Familiarity with fluid dynamics and the relationship between mechanical geometry and flow performance.
Experience designing products for demanding environmental or industrial conditions.
Knowledge of ingress protection, corrosion resistance, sealing systems, environmental testing, or high-reliability product development.
Experience supporting engineering validation testing, design validation testing, and production validation builds.
Familiarity with tolerance-stack analysis, FEA, CFD, or other engineering simulation tools.
Experience supporting products from early-stage prototyping through production launch.

Responsibilities

Own the detailed mechanical design of new nozzle architectures and related assemblies.
Develop and optimize components for performance, durability, manufacturability, weight, packaging, and cost.
Translate product requirements and engineering concepts into complete mechanical designs.
Evaluate design tradeoffs involving geometry, materials, tolerances, actuation, fluid flow, and system integration.
Build and test prototypes to validate designs and identify opportunities for improvement.
Support design reviews, failure analyses, and iterative product development.
Identify, evaluate, and source motors, actuators, gearboxes, sensors, and related electro-mechanical components.
Integrate motors and actuation systems into broader nozzle and hardware assemblies.
Define motor requirements, including torque, speed, duty cycle, power, packaging, environmental performance, and expected service life.
Design mechanical interfaces, mounting systems, enclosures, transmission components, and cable-routing solutions.
Develop test plans to validate motor performance, reliability, thermal behavior, and system-level operation.
Collaborate with electrical, embedded, controls, and systems engineers to ensure seamless integration.
Produce accurate, manufacturing-ready 3D CAD models, assemblies, and detailed 2D drawings.
Apply appropriate GD&T, tolerance analysis, material specifications, finishes, and manufacturing requirements.
Create and maintain bills of materials and engineering documentation.
Design components for machining, casting, injection molding, additive manufacturing, and other relevant manufacturing processes.
Work directly with rapid-prototyping vendors, suppliers, and manufacturing partners to resolve design and production issues.
Incorporate supplier and manufacturing feedback into product designs.
Support prototype builds, engineering validation, design validation, and production-readiness activities.
Ensure accurate and timely handoffs from engineering to sourcing and manufacturing.
Work closely with mechanical, electrical, embedded, product, supply chain, quality, and manufacturing teams.
Participate in system architecture discussions and cross-functional design reviews.
Identify technical risks early and develop practical mitigation plans.
Investigate prototype and field failures and drive corrective design actions.
Communicate design decisions, technical tradeoffs, test findings, and project risks clearly.
Manage assigned design work against project schedules and upcoming product milestones.