Senior Field Service Engineer

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

Our AEROS® energy operating system is the engine of innovation to provide advanced control functions allowing our 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. The combination of excellence in battery technology and production coupled with nearly two decades of energy storage integration makes LGES Vertech a leading supplier and integrator in the power and energy markets.

LGES Vertech empowers and expects its team members to assume responsibility and make good decisions, while maintaining a team environment that fosters collaboration and innovation. Our diverse and growing team enjoys competitive salaries, generous benefits, including 100% employer sponsored medical, dental and vision insurance, and flexible working hours.

For more information about LGESVT, please visit

The BESS Senior Field Service Engineer (Sr. FSE) is responsible for providing expert field service on Battery Energy Storage Systems (BESS) and ancillary equipment from commissioning completion / installation through warranty and long‑term service support. This role interfaces with third‑party suppliers of major components (including inverters/PCS, transformers, HVAC) and operates as a technical lead supporting customers, subcontractors/authorized service providers, and internal field teams.

This role provides a pathway to advanced technical, site leadership, or service operations roles within the organization.

• Own availability and service‑level commitments (SLAs) for assigned sites during service activities, ensuring safe execution, timely restoration, accurate communication, and proper documentation to support contractual performance.
• Establish, promote, and maintain strong customer service relationships with internal and external stakeholders.
• Safely operate, plan, and perform preventive and corrective maintenance, including troubleshooting, and repairs.
• Support software/firmware upgrades and related service activities.
• Maintain accurate site records of work performed and site issues; ensure documentation quality in service tools/work orders.
• Support service readiness activities tied to transition into long-term O&M (tools/spares/access readiness, onboarding support, and cross‑functional coordination as applicable).

• Communicate effectively, collaborate, and provide live remote technical support and/or training to team members, partners (ASPs), customers using virtual tools (e.g., phone/Teams/Web Ex or similar).
• Educate customers and contractors on basic equipment operation, response, and maintenance.
• Provide after‑hours on‑call support on a rotation basis.
• Contribute to product support procedures, training, troubleshooting guides, and other service documentation.
• Support the product return and technical support process as needed.
• Utilize CMMS and digital service platforms (i.e. Soft Wrench, SAP, Salesforce) to document work orders, track issues, support data‑driven service execution, and root‑cause identification and long‑term corrective actions.

• Lead and model safe work practices, including LOTO, energized work controls, job hazard analysis (JHA) and job safety analysis (JSA).
• Ensure compliance with applicable safety standards (e.g., NFPA 70E, OSHA) during field execution and subcontractor activities.
• Actively identify and report…