ESS · 1 day ago
Mechanical Design Engineer III
Wilsonville, OR
Full-time
Onsite
Senior Level
5+ years expESS Inc is a globally recognized leader in sustainable energy storage, aiming to enable the decarbonization of the grid. They are seeking a Mechanical Design Engineer III to focus on R&D of advanced battery power module technology, ensuring performance, reliability, and cost through mechanical design and analysis.
Enterprise SoftwareEducationHuman ResourcesProfessional ServicesCareer PlanningManagement Information SystemsStaffing Agency
No H1B
Responsibilities
Senior contributor to the mechanical design of stack and subsystem hardware (manifolds, flow fields, plates, frames, enclosures, seals) using 3D CAD and rigorous design control (models, drawings, specs, BOMs; GD&T)
Analyze and optimize thermal/fluid performance and structural integrity (pressure/temperature/vibration/thermal cycling) using FEA/CFD. Translate insights into robust design updates
Engineer for manufacturability and reliability (DFM/DFA/DFR) across casting, machining, plastics (injection molding, extrusion, plastics welding), and sealing processes (welding, adhesives, gaskets)
Select materials compatible with electrolytes and corrosive environments; address creep, fatigue, and stress-relaxation mechanisms with appropriate safety margins and life predictions
Correlate models to test: develop validation plans, define test articles/fixtures, analyze data, close the loop to simulation, and drive root-cause and corrective actions
Collaborate across all engineering and supply chain teams to convert performance targets into durable, cost-effective designs ready for production
Continuously improve cost, reliability, and serviceability while maintaining safety, compliance, and quality standards
Qualification
Required
B.S. in Mechanical Engineering (or related)
5+ years of experience in mechanical design and analysis of complex fluid or electrochemical systems (or equivalent combination of graduate and industry experience)
Proficiency in 3D CAD (Inventor, SolidWorks, or equivalent) for parametric design, detailed drawings, and BOMs
Strong foundation in thermodynamics, fluid mechanics, and solid mechanics, with hands-on FEA/CFD and tolerance stack-ups
Developed detailed engineering drawings using GD&T principles per ASME Y14.5, incorporating a strong understanding of quality inspection methods to accurately define and verify critical-to-function (CTF) and critical-to-quality (CTQ) features
Experience designing for corrosive or reactive fluids and hermetic sealing (welds, adhesives, gaskets)
Track record of cross-functional execution from concept to validated hardware (proto pilot to production)
Clear, concise communicator; self-directed; able to juggle multiple design workstreams
Ability to lift 50 lbs. unassisted
Ability to follow job required Standards and Safety Protocols, per pre-defined processes
Must be able to wear Personal Protection Equipment according to OSHA rules and regulations
Preferred
M.S. in Mechanical, Materials Science, Energy Systems, or Chemical Engineering
Experience in battery, fuel cell, or power-generation system design
Demonstrated multiphysics experience (ANSYS, COMSOL, or equivalent) and test correlation
Scaling from prototype to production; cost and reliability ownership
Knowledge of electrolyte-compatible materials and corrosion mitigation
Experience with pressure-bound assemblies and pressure vessel considerations
Plastics and polymer component design for injection molding, extrusion, and plastics welding
Hands-on experience with CNC/CAM and other fabrication and machining techniques, with a solid understanding of tolerances, tool paths, and manufacturability trade-offs
Practical understanding of material creep, fatigue, and stress relaxation, including creep and fatigue failure analysis and life prediction for polymers and metals under sustained loads, vibration, and thermal cycling
Programming proficiency using engineering platforms such as Python or MATLAB for design automation, data analysis, or simulation post-processing
Benefits
Comprehensive health insurance plan (medical, dental, vision)
FSA and HSA accounts
401k with company match
Flexible time off (FTO)
8 paid holidays
Company
ESS
ESS provides education partners realize efficiencies and economies of scale with local ESS call centers.
10001+ employees
Funding
Current Stage
Late StageTotal Funding
unknown2022-01-27Acquired
Leadership Team
Buddy Helton
President/CEO
John Devall
Chief Financial Officer
Recent News
2023-12-20
MarketScreener
2023-12-15
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