Technical Service Engineer

Field Service Engineer – Utility-Scale Battery Energy Storage (BESS)

Location: Montalto di Castro ( )

Reports to: Technical Support Manager

Overview of the Position

LONGi Storage is a fast-growing company specializing in advanced energy storage solutions. We are seeking a skilled and motivated Field service engineer to join our after-sales team, focusing on the operation, maintenance, and troubleshooting of utility-scale Battery Energy Storage Systems (BESS).

This role is ideal for a hands-on technical professional who enjoys working on-site, solving complex problems and ensuring the highest levels of system reliability and customer satisfaction.

Key Responsibilities

After-Sales Service & Support

• Provide on-site commissioning and O&M services for utility-scale BESS installations.
• Perform functional and acceptance testing with customers.
• Diagnose and resolve technical issues within battery packs, power conversion systems and related components.
• Conduct preventive and corrective maintenance to ensure optimal system performance.

Customer Engagement

• Act as the primary technical contact for customers after project handover.
• Provide training and guidance to customers’ operations teams.
• Ensure timely, professional communication and customer satisfaction during service interactions.

Documentation & Reporting

• Prepare detailed service reports including fault analysis, troubleshooting, repair description and technical recommendations.
• Provide feedback to the engineering and R&D teams regarding recurring issues and potential product improvements.
• Support warranty management and escalation processes.

Collaboration

• Work closely with project delivery, engineering and sales teams to ensure smooth handover from project completion to service phase.
• Coordinate with suppliers and partners for replacement parts and technical solutions.

Requirements

Technical Skills & Experience

• 3+ years of experience in after-sales service, field engineering or systems commissioning - preferably energy storage, renewable energy sources or power electronics.
• Practical knowledge of electrical systems (low/medium voltage), BESS technology, power conversion systems (PCS) and energy management systems (EMS).
• Hands-on experience in troubleshooting of battery systems and SCADA/EMS systems.
• Ability to read and interpret electrical diagrams, technical manuals and engineering documentation.

Education & Competencies

• Bachelor’s degree in electrical engineering, automation or a related technical field.
• Fluent English.
• Strong problem-solving skills and the ability to work independently under pressure.
• High level of professionalism in customer interactions.
• Availability for frequent travels.

What We Offer

• Relevant role in a rapidly growing renewable energy company.
• Competitive salary and travel allowances
• Direct involvement in high visibility green energy transformation projects.
• Access to cutting-edge energy storage technology.
• Career growth opportunities in a global, future-oriented industry.
• Collaborative and innovative work environment.