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 (España)
🏢 Longi Solar
📍 España