Field Service Engineer - ESS (all genders)

Shaping the future of energy storage At A123 Systems, we're driving the transition to cleaner, more efficient energy solutions with advanced lithium ion storage technologies. Our cutting-edge battery systems offer superior energy density, safety and durability, helping vehicle manufacturers achieve exceptional performance while reducing their environmental footprint. Our expertise goes beyond automotive applications. In addition to high-voltage batteries for electric and hybrid vehicles and low-voltage solutions that improve efficiency, we also produce energy storage systems (ESS) designed to optimize energy use, support the integration of renewable energy sources and provide reliable backup power. With capabilities that include innovative cell chemistry, integrated thermal management, software and electronics, we deliver complete, cost-effective energy solutions tailored to our customers' needs. Backed by a global manufacturing footprint and a commitment to pushing the limits of performance, A123 Systems is reducing emissions, improving energy efficiency and powering a cleaner, greener future across industries.

We are looking for a Field Service Engineer - ESS (all genders) to provide technical support, installation and troubleshooting of our high and low voltage energy storage products across Europe. In this role, you will work closely with customers to ensure the smooth operation of the products, diagnose technical issues and liaise with internal teams to achieve continuous improvements. If you thrive in a dynamic environment and have a passion for solving problems in the energy storage industry, we want to hear from you!

Responsibilities

• Provide consulting and technical support for European customers on A123 Systems' full range of energy storage solutions.
• Install and commission products at customer sites.
• Deliver both remote (phone/email) and on-site troubleshooting and technical support.
• Conduct failure analysis and diagnostics following IATF and VDA standards.
• Document and report identified failures and service activities.
• Oversee and ensure compliance with 5S standards in the analytical laboratory.
• Coordinate field activities, service visits, and support schedules.
• Act as a liaison between customers and internal departments (engineering, warranty, product improvement).
• Participate in internal and external technical training programs.

Education & Experience

• Completed training in a technical field (e.g., electrical engineering, mechatronics, or similar).
• Minimum 3 years of direct experience in installation, service, and troubleshooting of Industrial/Commercial Energy Storage Systems (ESS).
• Hands-on experience with solar, inverter, and battery systems for Residential ESS installations and service.
• High Voltage Technician Level 2 training is a plus

Knowledge, Skills, And Abilities

• Strong problem-solving and customer service skills to diagnose and resolve technical issues effectively.
• Proven ability to work independently with a can-do attitude, high reliability, and flexibility.
• Excellent communication and presentation skills in English and German
• Proactive and creative thinker who takes ownership of tasks.
• Ability to thrive in a dynamic, fast-paced environment with evolving policies.
• Valid Class B driver’s license and willingness to travel within Europe
• Adaptable and responsive to changing requirements in the field.

We Offer

• Work culture: Flat hierarchies & creative freedom: Your ideas count and your work has a direct impact.
• Team spirit: A supportive, warm atmosphere with helpful colleagues.

Onboarding & Development

• Comprehensive onboarding: An induction plan, mentoring and support right from the start.
• Career development: Continuous training, individual career planning and global project work.

Benefits

• Attractive salary package with notebook and mobile phone
• 30 days holiday per year for a good work-life balance
• Company pension scheme
• Group accident insurance
• Corporate benefits
• Urban Sports membership
• E-bike leasing discount
• Home office options

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