Sr. Electrical Engineer

ESS Tech, Inc. is seeking a Senio. Electrical Engineer – Battery Energy Storage Systems (BESS) to lead and support the design, development, and delivery of grid‑scale and distributed energy storage projects. This role owns electrical designs from early concepts through final product release and supports both internal product development and external customer projects. The successful candidate will collaborate across multidisciplinary engineering teams and serve as a technical leader, mentor, and subject matter expert in battery energy storage systems.

Technical Ownership & Design

• Own battery system electrical designs for ESS energy base products from early development through final product release.
• Support grid‑scale Battery Energy Storage System (BESS) projects by developing conceptual layouts, one‑line diagrams, and detailed electrical designs through Issue for Construction (IFC) packages.
• Support microgrid and distributed energy resource projects by developing detailed electrical engineering designs.
• Evaluate, analyze, and compare energy storage technologies, products, and vendors. Support technology and vendor selection and implementation.
• Develop and review engineering design plans, technical specifications, cost estimates, and construction documents at various design milestones.

Project & Client Support

• Prepare written technical reports clearly communicating battery energy storage concepts, feasibility studies, and use‑case analyses to diverse audiences.
• Participate in meetings with clients, contractors, vendors, and internal stakeholders in support of project execution and business development.
• Provide construction‑phase technical support including bid addenda, submittal reviews, RFIs, construction progress reports (CPRs), and change orders.

Cross Functional Collaboration

• Coordinate closely with civil, structural, fire & life safety (FLS), power systems, and SCADA teams/contractors to deliver IFC design packages.
• Participate in design reviews with internal stakeholders, governing agencies, and AHJs.

Leadership & Expertise

• Serve as a technical mentor or counselor to junior engineering staff.
• Coordinate project workload to ensure on‑time delivery of engineering documents.
• Conduct quality assurance and quality control (QA/QC) reviews of work performed by other engineers, designers, and technicians.
• Provide technical assistance and subject‑matter expertise to ESS teams and customers as needed.
• Support development and continuous improvement of internal engineering design guidelines, catalogs, and templates. Direct contributions to technical, R&D, and project development through document creation and review.
• All other duties as assigned.

• Bachelor’s degree in Engineering from an ABET-accredited engineering program or equivalent accredited agency with 8+years of proven experience. A mix of education and applicable experience will be considered.
• Strong fundamentals in electrical and mechanical principles.
• Background in power systems engineering with a focus on LV and MV installations.
• Ability to read and understand electrical schematics and mechanical drawings.
• Experience with at least one BESS installation from start to finish involving multiple technical stakeholders.
• Proficient with one or more drafting software packages for one line diagram creation and site construction layout.
• Must be able to work in cross-functional, fast‑paced engineering environments with little oversight or direction.

• Professional Engineering (PE) license preferred but not required.
• Systems‑level thinker with the ability to optimize products across disciplines and technical domains.
• Ability to interpret engineering deliverable content and how it will impact construction feasibility.
• Knowledgeable in at least one of the following standards: UL9540, IEC
  62932, or NFPA 70 (NEC).
• Proficiency in test planning, experimental design, and statistical data analysis for subscale and production level systems.
• Understanding of battery chemistry fundamentals, flow batteries, and specific challenges associated with implementation.
• Strong documentation, reporting, and technical communication skills.

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.