Position Overview
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 / PresalesTake 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，etcEnsure project milestones are achieved according to schedule and budget.2. Project Commissioning Planning and ExecutionManage 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 IntegrationDevelop 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 testsWork 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 ManagementProvide
O&M; service
after Commercial Operation Date (COD).Carry out preventive and corrective maintenance on BESS/PCS/EMSPerform remote operations to support maintenance and fault resolutionConduct site inspections, diagnostics, and testing using specialist equipmentEnsure strict compliance with Health & Safety standards and HSE regulations in related countriesSupervise subcontractors and ensure quality and compliance of third-party worksSupport commissioning, upgrades, and major repairsReview technical documentation and contribute to maintenance procedures, RAMS, and method statementsLiaise with OEMs and suppliers on maintenance processes and technical clarificationsSupport annual maintenance planning for BESS assetsProvide O&M; Training to customer O&M; team and subcontractor
QualificationsDegree 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 siteExperience with
large-scale BESS, solar + storage, or grid infrastructure
preferred.Strong understanding of Grid integration, Power systems, Energy management systems, High-voltage systems, HSE
SkillsStrong technical knowledge of
BESS, LV systems, inverters, EMSKnowledge of grid compliance and power system integrationAbility to manage multiple technical stakeholdersStrong problem-solving abilityWillingness to travel to project sites

📌 Bess Delivery & Service Engineer – Utility Scale Projects (Madrid)
🏢 Longi Solar
📍 Madrid