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Job Details

Mechanical Engineer - Electromechanical

  2026-04-30     ESS     Wilsonville,OR  
Description:

Mechanical Engineer - Electromechanical

Catalyzing a cleaner future.

At ESS, our mission is to accelerate global decarbonization by providing safe, sustainable, long-duration energy storage that powers people, communities, and businesses with clean, renewable energy anytime and anywhere it's needed. As more renewable energy is added to the grid, long-duration energy storage is essential to providing the reliability and resiliency we need when the sun is not shining and the wind is not blowing.

Our technology uses earth-abundant iron, salt, and water to deliver environmentally safe solutions capable of providing up to 12 hours of flexible energy capacity for commercial and utility-scale energy storage applications. Established in 2011, ESS Inc. enables project developers, independent power producers, utilities, and other large energy users to deploy reliable, sustainable long-duration energy storage solutions.

ESS is seeking a dynamic Mechanical Engineer with a strong background in mechanical design, thermodynamics, electronics packaging, and structural analysis. The role will focus on the system design surrounding ESS's advanced battery technology to ensure product life, cost, and efficiency. The successful candidate will have excellent project management skills and an ability to manage multiple projects effortlessly.

The ideal candidate will have a passion for sustainability and the environment, will thrive in a fast-paced entrepreneurial setting, be self-motivated, and have an interest in disruptive, cutting-edge technology.

What You'll Do At ESS

  • Product development through research, design, and evaluation of mechanical and electrical systems
  • Design, build, and test prototypes to support system design activities
  • Develop performance models to optimize system efficiency and performance
  • Utilize 3-D CAD system, Autodesk Inventor, to prepare detailed manufacturing drawings and Bills of Materials (BOMs)
  • Lead and provide technical design
  • Update and redesign existing systems and equipment to improve performance and manufacturability
  • Prepare performance requirements for equipment and systems
  • Review designs against UL, NFPA, NEC, and ASME codes
  • Interface with manufacturing, sales, and marketing across all stages of the product development and release process
  • Interface with and provide product specifications to suppliers and partners

What You Bring To The Table

Minimum Requirements

  • BS in Mechanical or Electrical Engineering
  • 5+ years' experience in an Engineering Design role
  • Proven proficiency in 2-D & 3-D CAD systems (i.e., AutoCAD & Autodesk Inventor) for design, documentation, and fabrication
  • Experience designing enclosures for electronics and electrical systems in hazardous and corrosive environments
  • Knowledge of IP and NEMA enclosure ratings
  • Experience with complex cable routing and management
  • Understanding of electrical schematics and P&ID's
  • Ability to work in a cross-functional and geographically dispersed team environment
  • Strong communication and presentation skills, affable, with demonstrated maturity and professionalism
  • Self-starter who can follow tasks through to completion with little guidance
  • Ability to work in a team environment to collectively solve problems
  • Ability to multi-task several projects and prioritize workload to meet business specific deadlines
  • 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

We'd love to see

  • Master's degree in Mechanical or Electrical Engineering
  • Experience in new-product introduction and scale to manufacturing
  • Experience commercializing new products in a production environment
  • Experience with Autodesk Inventor Cable & Harness module (or equivalent)
  • Experience with UL, NFPA, and NEC requirements
  • Experience managing and working with third party engineering firms
  • Experience in battery, fuel cell technologies or power generation systems

Benefits of working at ESS.

In addition to the value of working with and helping grow a global reaching clean technology, ESS offers company assisted medical, dental and vision, 401k with company match, Employee Stock Purchase Plan (ESPP), a generous flexible time off plan, and 8 paid holidays.

As an equal opportunity employer, we are open to considering every qualified candidate who is eligible and legally authorized to work in the United States on a full or part-time basis, without a need for sponsorship.


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