Energy Storage Systems - Solutions Engineer

Description & Requirements

AESC is looking to add an Energy Storage Solution Engineer to our team in the US.

• Full-Time
• Remote

AESC is a global leader in the development and manufacturing of high-performance batteries for zero-emission electric vehicles and energy storage systems. Founded in Japan in 2007 and headquartered in Yokohama, AESC has been building manufacturing capabilities around the world in the U.S., U.K., Europe, Japan and China to serve key markets and leading customers locally for over 14 years. Today, AESC has become the partner of choice for the world’s leading OEMs and energy storage providers in North America, Europe, and Asia.

Its advanced technology powers over one million electric vehicles and provides more than 15GWh of installed capacity for battery energy systems in over 60 countries.

AESC is expanding its footprint in the United States with gigafactories in Kentucky, South Carolina, and Tennessee to meet the growing demand for EV and BESS batteries and strengthen its presence in the North American market. AESC's Tennessee gigafactory in Smyrna, which has been operational and supplying electric vehicle batteries for the Nissan LEAF since 2012, was retooled in 2025 and now produces batteries for Energy Storage Systems.

The South Carolina gigafactory in Florence will supply next generation cells for BMW starting in 2026. The Kentucky gigafactory in Bowling Green will supply high-performance batteries and components for other OEMs. AESC is committed to our local communities where it is making investments, creating jobs, and supporting local charities.

The Senior Energy Storage Application Engineer leads technical solution development for utility-scale and commercial battery energy storage projects. This role serves as a primary technical interface with customers, sales, product, and engineering teams, owning system design, proposal strategy, and technical risk assessment from early engagement through contract award. The position requires deep expertise in BESS architecture, grid integration, and industry standards, along with the ability to guide internal teams and influence external stakeholders.

• Lead technical solution design for BESS projects, including system sizing, configuration optimization, and performance modeling
• Serve as technical lead for RFP/RFQ responses, ensuring compliance with customer specifications and industry standards
• Own technical proposal packages including SLDs, layouts, performance guarantees, and compliance documentation
• Provide expert guidance on codes and standards (UL, NFPA, IEEE, CSA, local AHJ requirements)
• Interface directly with customers, EPCs, developers, and utilities to resolve technical questions and drive alignment
• Conduct technical risk analysis and develop mitigation strategies across design, performance, and schedule
• Mentor junior engineers and review technical deliverables for accuracy and quality
• Collaborate with product and R&D teams to influence product roadmap based on market and project requirements
• Support contract negotiations on technical terms, guarantees, and performance specifications
• Represent the company at technical workshops, conferences, and industry meetings

• Bachelor’s or Master’s degree in Electrical Engineering, Power Systems, Energy Engineering, or related field
• 5–10+ years of experience in energy storage, power generation, grid systems, or utility-scale infrastructure
• Strong knowledge of BESS system architecture, including batteries, PCS/inverters, EMS, thermal systems, and controls
• Experience supporting customer-facing technical discussions and proposals
• Ability to interpret electrical drawings, specifications, and performance models
• Excellent communication, leadership, and stakeholder management skills

• Experience supporting utility-scale storage projects (>100 MWh systems)
• Knowledge of grid-forming/grid-following controls and interconnection requirements
• Familiarity with UL 9540/9540A, NFPA 855, IEEE 1547/2800, and regional interconnection processes
• Experience negotiating technical contract terms and guarantees
• Proficiency in simulation or modeling tools…