The

BESS Delivery & Service Engineer (Utility Scale) is responsible for the execution and lifecycle support of

large-scale battery energy storage projects

after the project is secured by the sales and presales teams. The role manages the

technical delivery, commissioning, and operational & maintenance support

of utility-scale BESS projects, working closely with EPC contractors, grid operators, and project stakeholders.

Project Handover from Sales / Presales Take over BESS projects from the

sales and presales teams

after contract signing. Review technical proposals, system configurations, and service scope. Confirm system design and project requirements with internal teams and customers including: System design, Grid requirements, Performance guarantees, Project schedules，etc Ensure project milestones are achieved according to schedule and budget. Project Commissioning Planning and Execution Manage the

full lifecycle delivery of utility-scale BESS projects

. Coordinate with EPC contractors, integrators, and equipment suppliers. Guide EPC for the equipment unloading, installation etc. Commissioning & Grid Integration Develop and execute commissioning plans, procedures, and checklists for BESS projects. Conduct commissioning for battery racks, BMS (Battery Management System), PCS (Power Conversion System),



EMS (Energy Management System) and MV transformer. Validate integration of electrical, control, and communication systems. Conduct grid compliance and performance verification tests Work with technical support teams to resolve technical issues during commissioning. Operations & Maintenance Service Management Provide

O&M; service

after Commercial Operation Date (COD). Perform remote operations to support maintenance and fault resolution Conduct site inspections, diagnostics, and testing using specialist equipment Supervise subcontractors and ensure quality and compliance of third-party works Support commissioning, upgrades, and major repairs Support annual maintenance planning for BESS assets Provide O&M; Training to customer O&M; team and subcontractor

Degree in

Electrical Engineering, Power Systems, Energy Engineering

, or related field. ~2–5 years’ experience

in utility-scale renewable energy or power infrastructure projects. ~ Experience with

large-scale BESS, solar + storage, or grid infrastructure

preferred. ~ Strong understanding of Grid integration, Power systems, Energy management systems, High-voltage systems, HSE

Willingness to travel to project sites

📌 BESS Delivery & Service Engineer - Utility Scale Projects (Castro Urdiales)
🏢 Longi Solar
📍 Castro Urdiales