Position Overview

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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.

Key Responsibilities

1. 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 subcontractor

Qualifications
Degree in

Electrical Engineering, Power Systems, Energy Engineering , or related field.
2–5 years’ experience

in utility-scale renewable energy or power infrastructure projects. xcskxlj
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, HSE

Skills
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 (Valencia)
🏢 Longi Solar
📍 Valencia