Position OverviewThe 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.Key Responsibilities1. 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.2. 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.- Ensure compliance with technical specifications, grid requirements, and safety standards.3. 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 grid operators and technical partners to complete system integration and SAT.- Work with technical support teams to resolve technical issues during commissioning.- Ensure successful handover to operations.4. Operations & Maintenance Service Management- Provide O&M; service after Commercial Operation Date (COD).- Carry out preventive and corrective maintenance on BESS/PCS/EMS- Perform remote operations to support maintenance and fault resolution- Conduct site inspections, diagnostics, and testing using specialist equipment- Ensure strict compliance with Health & Safety standards and HSE regulations in related countries- Supervise subcontractors and ensure quality and compliance of third-party works- Support commissioning, upgrades, and major repairs- Review technical documentation and contribute to maintenance procedures, RAMS, and method statements- Liaise with OEMs and suppliers on maintenance processes and technical clarifications- Support annual maintenance planning for BESS assets- Provide O&M; Training to customer O&M; team and subcontractorQualifications- Degree in Electrical Engineering, Power Systems, Energy Engineering, or related field.- 2–5 years’ experience in utility-scale renewable energy or power infrastructure projects.- Necessary Certifications to work on site- Experience with large-scale BESS, solar + storage, or grid infrastructure preferred.- Strong understanding of Grid integration, Power systems, Energy management systems, High-voltage systems, HSESkills- Strong technical knowledge of BESS, LV systems, inverters, EMS- Knowledge of grid compliance and power system integration- Ability to manage multiple technical stakeholders- Strong problem-solving ability- Willingness to travel to project sites

📌 BESS Delivery & Service Engineer – Utility Scale Projects (Lugo)
🏢 Longi Solar
📍 Lugo