Technical Service Engineer BESS - Romania (d/f/m)

Position, Location, Department
Full-time | Romania | Technical Europe

Position Summary
The Technical Service Engineer BESS is responsible for the on-site installation support, commissioning, grid connection, and after-sales technical service of Battery Energy Storage System (BESS) projects across Eastern Europe. The role acts as a supporting on-site technical representative, working under the guidance the Team Lead Service Delivery BESS, ensuring safe, timely, and high-quality project delivery from installation through commissioning, acceptance, and post-installation support.

Reporting Line
Reports to: Team Lead Service Delivery BESS

Major Responsibilities
Site Delivery & Commissioning

• Provide on-site technical support during installation, commissioning, testing, and handover of Battery Energy Storage System (BESS) projects.
• Support senior engineers in supervising installation activities and verifying compliance with technical specifications, quality standards, and safety requirements.
• Participate in system commissioning, functional testing, and grid connection activities under appropriate technical guidance.
• Resolve on-site technical issues related to electrical installation and system integration, escalating complex issues where required.
• Support project acceptance, punch-list resolution, and final technical handover to customers.

After-Sales Technical Support

• Respond promptly to customer technical enquiries via remote or on-site support and ensure timely issue resolution.
• Troubleshoot hardware, software, communication, and system performance issues, with support from senior technical specialists where required.
• Manage after-sales service activities through the service management system, ensuring accurate documentation and timely closure of work orders.
• Coordinate with engineering, product, and technical support teams to resolve technical issues efficiently.
• Coordinate with Sales teams to ensure effective customer communication and high customer satisfaction.

Customer Support & Training

• Support the delivery of customer training on system operation, routine maintenance, and safety procedures.
• Handle customer complaints professionally and escalate complex technical issues through the appropriate support channels.

Continuous Improvement

• Collect and communicate customer feedback, technical issues, and field observations to support product improvements.
• Maintain technical knowledge of BESS products, system architecture, and commissioning procedures through ongoing training and certification programs.
• Support spare parts inventory management and ensure service tools are properly maintained.

Performance Indicators

• Response time to customer service requests
• Mean Time to Repair (MTTR)
• First-time fix / first-visit resolution rate
• On-time commissioning and project handover
• Technical quality of commissioning and documentation
• Customer satisfaction with field service support
• Compliance with EHS and site safety requirements
• Accuracy and timeliness of service documentation

Required Qualifications

• Bachelor's degree or technical qualification in Electrical Engineering, Power Engineering, Renewable Energy, Electronics, Mechatronics, or related technical discipline
• Typically, 2-4 years of experience in field service, commissioning, site engineering, maintenance, or technical support within power systems, inverters, power electronics, electrical infrastructure, MV/HV installations, renewable energy, or a related technical industry
• Good understanding of electrical systems, inverters, power electronics, MV/HV equipment, power conversion equipment, or Battery Energy Storage Systems (BESS). Previous BESS experience is advantageous but not required
• Experience supporting electrical installation, maintenance, commissioning, or troubleshooting activities
• Ability to interpret electrical drawings, wiring diagrams, and single-line schematics
• Basic knowledge of electrical safety standards and grid-connected electrical systems is preferred
• Relevant local language: C1 (professional working proficiency); English: C1 (professional working proficiency)
• Valid driver's license

Skills & Competencies

• Strong technical troubleshooting and diagnostic skills
• Practical understanding of electrical systems, electrical testing, troubleshooting, and commissioning fundamentals
• Structured, detail-oriented, and safety-focused working style
• Strong customer service and communication skills
• Ability to work independently while effectively seeking guidance and technical support when required
• Strong problem-solving and decision-making capability
• Cross-functional collaboration and stakeholder management skills
• High level of adaptability and willingness to travel extensively

Travel Requirement

• Very frequent travel across Eastern Europe (estimated ≥50% of working time).
• Extended periods at customer sites are expected.