Senior BESS Design Engineer (m/w/d) in Hamburg

INTEC Energy Solutions provides best-in-class services in Engineering, Procurement and Construction (EPC), Battery Energy Storage Systems (BESS), project development, consulting, operations and maintenance, and new energy solutions. With a globally experienced team, INTEC has successfully delivered more than 190 projects, achieving an impressive installed and secured capacity of 5 GW. Headquartered in the United Kingdom, INTEC maintains offices in Germany, Turkey, Australia, New Zealand, Azerbaijan, Romania, Mauritius, Spain, Mauritania, and the Philippines. Additional locations are already planned as part of the company's continued global expansion.

You have deep expertise in BESS design and want to take your career to the next level?

To strengthen our team, we are looking for a “Senior BESS Design Engineer (m/w/d)” in Hamburg. Your chance to actively shape the energy transition!

Location: Hamburg (Hybrid model with 3-4 days/week in the office)

Key Responsibilities:

• Electrical planning and system design of Battery Energy Storage Systems (BESS) in the utility-scale segment
• Creation of single-line diagrams (SLD), protection concepts, and electrical system layouts
• Design and dimensioning of battery modules, inverter systems (PCS), transformers, cabling, and medium-voltage connections
• Selection and technical specification of relevant BESS components (e.g. battery containers, HVAC, BMS, EMS, protection systems)
• Development of technical documentation, including wiring diagrams, cable schedules, interface documentation, bills of materials (BoM), and design reports
• Technical coordination with project management, procurement, suppliers, and grid operators
• Ensuring compliance with applicable standards and regulations (e.g. VDE-AR-N 4110/4120, IEC 62933, IEC 61439, VDE 0100)
• Support in system optimization through evaluation of operational data and simulations

Your Profile:

• Degree in Electrical Engineering, Energy Engineering, or a comparable qualification
• Several years of professional experience in the design and engineering of BESS systems, ideally in the utility-scale sector
• In-depth knowledge of BESS component integration (batteries, PCS, transformer, protection systems, BMS/EMS, grid interface)
• Proficient in relevant tools such as:
  • AutoCAD / EPLAN (for electrical schematics and layouts)
  • ETAP, DIgSILENT PowerFactory (for grid calculations and protection concepts) is an advantage
  • Excel (for technical analysis and BoM creation), optionally Python for automating calculations
• Experience with grid connection projects, common EPC processes, and interface coordination
• Knowledge of medium-voltage technology, protection systems, and compliant design of electrical systems
• Business fluent in English, German at least B2
• Independent, structured, and solution-oriented working style

What we offer:

• A dynamic company in the rapidly growing renewable energy sector
• Exciting and challenging large-scale projects in the PV and BESS space
• An international, motivated team with flat hierarchies
• Flexible working hours and remote work options
• Attractive compensation with performance-based bonus models
• Opportunities for professional development and career growth in a future-oriented market
• Company pension scheme and capital-forming benefits
• Hansefit membership with access to numerous fitness, sports, and wellness facilities across Germany
• Modern IT equipment and tools

Ready to shape the future of the energy transition with us? Please apply via the application button or send your application documents directly to hr.germany@in-tecenergy.com – we look forward to getting to know you!