Battery Application Engineer

About the Company

LG Energy Solution Vertech, Inc. (LGES Vertech) is a full-service energy storage system supplier and integrator. Using core strengths in expert customer service, unparalleled safety, and manufacturing excellence, we deliver standardized, fully integrated energy storage systems to a rapidly growing worldwide market. Our systems reduce capital equipment and installation costs while enhancing system-level performance and reliability through automated monitoring and analytics across battery, power conditioning, and auxiliary systems.

The AEROS® energy operating system powers advanced control functions, enabling customers to maximize the value of their energy storage assets. Our service capabilities include advanced monitoring and analytics, scheduled maintenance, augmentation, and auxiliary system upgrades. Combining excellence in battery technology and production with nearly two decades of energy storage integration, LGES Vertech is a leading supplier and integrator in the power and energy markets.

LGES Vertech is part of LG Energy Solution, headquartered in Korea, which develops the batteries used in our integrated solutions. LG Energy Solution is a global leader in battery technology. We are a highly matrixed, team-oriented organization fostering cross-functional collaboration and innovation, seeking high-caliber candidates who embody our corporate commitment to the virtues of humble, hungry, and smart.

About the Role

We are hiring two Battery Application Engineers to join the newly established Battery Application Engineering Team in Westborough, MA. Each engineer will serve as a primary technical resource for LGES Vertech’s ESS product lines, supporting both AC and DC LINKs. AC LINKs integrate inverters and batteries into a single enclosure, while DC LINKs integrate batteries in a single enclosure. Primary focus areas—AC or DC—will be determined based on each individual’s background and strengths.

This is a product-focused technical role. The engineer will build a broad understanding of LGES-developed battery products and serve as the US team’s internal technical resource on battery system characteristics. The role requires subject matter expertise in one or more of the following areas: (a) battery cells, (b) DC/AC electrical systems, (c) mechanical/structural/civil engineering, or (d) software/controls.

The role focuses on enabling internal Sales Engineering, Project Engineering, and System Engineering teams with clear, execution-ready technical guidance and solving complex issues arising from the integration of AC and DC LINKs in projects.

Responsibilities

• Develop working knowledge of AC and DC LINKs, including product architecture, key performance parameters, electrical systems, mechanical/structural characteristics, and BMS behavior, and serve as the US team's go-to resource for product technical questions.
• Become a subject matter expert in one of the following areas: (a) battery cells, (b) DC/AC electrical systems, (c) mechanical/structural/civil engineering, or (d) software/controls. For AC LINKs, understand how the system satisfies grid code requirements (e.g., LVRT, frequency response), performs grid-following/grid-forming functions, and enables blackstart.
• Serve as the internal technical resource for assigned BESS product lines—answering inquiries, supporting proposals, and clarifying product specifications for internal teams.
• Build and maintain standardized product documentation: Technical Datasheets, System Architecture Overviews, Interface Definitions, Compliance Summaries, and Q&A packages.
• Track LGES HQ product updates and new product introductions; assess US market relevance and communicate changes internally.
• Support pre-award and post-award activities: proposal reviews, technical clarifications, design deviation tracking, and customer technical queries.
• Contribute to the team knowledge base with lessons learned, templates, and case studies.
• Coordinate with ESVT Sales Engineering, Project Engineering, System Engineering, and HQ technical teams on active proposals and projects.
• Collect new product requirements based on customer/market information and interactions with internal partners (e.g., Sales Engineering, Project Engineering, and System Engineering teams). Work with product teams in HQ and the US to ensure products meet these requirements.

Requirements

• Bachelor’s degree in Electrical Engineering, Power Systems, Electrochemistry, Mechanical Engineering, Structural Engineering, Civil Engineering, Energy Engineering, Software/Controls, or a related field.
• 5+ years of experience in battery energy storage, power electronics, inverter/PCS systems, mechanical/structural engineering for large-scale equipment, or a closely related field.
• Technical depth in at least one of the following areas: (a) battery cells, (b) DC/AC electrical systems, (c) mechanical/structural/civil engineering (experience in container design, mounting, thermal/HVAC, seismic, or civil foundation is highly valued), or (d) software/controls with an emphasis on grid code requirements (e.g., LVRT, frequency response), grid-following/grid-forming functions, or blackstart.
• Ability to read and interpret technical documents, including engineering drawings, single-line diagrams, and product specifications.
• Strong written and verbal communication skills in English; Korean proficiency is a plus.
• Proficiency in Microsoft Office; SharePoint experience is a plus.

Preferred Qualifications

• Experience in utility-scale or C&I energy storage projects.
• Experience working across engineering, sales, and project management teams.

Benefits

The company offers competitive salaries and generous benefits, including 100% employer-sponsored medical, dental, vision, life, and disability insurance.

Schedule

Up to 15% travel to support customers and collaborate with international teams.