Johannes Roessner has been part of the battery testing industry since the very beginning. He studied Electrical Engineering and joined the freshly founded TÜV SÜD Battery Testing GmbH in 2011. Later, he took the position of Global Focus Segment Manager „New Energy Vehicles“ at TÜV SÜD Product Service division and spent seven years in Japan and China, building up battery test labs and coordinating the global battery testing at nine locations worldwide. In 2022, he founded BT Advisor UG. Johannes has deep experience in the planning, setup and operation of battery labs – from business case and market analysis to construction, ramp-up and operation. He has extensive knowledge about battery testing, test standards, validation plans and battery handling.

Martin Sekura, in the hydrogen industry since 2010, is likely one of the most experienced members of the „hydrogen family“. He studied Mechanical Engineering and is a Master of Business Administration. Before he co-founded batch2 engineering GmbH, he was the Hydrogen and Fuel Cell Business Development Manager at TÜV SÜD Product Service GmbH. Through all of his roles, he gained extensive experience in planning, setup, and operation of hydrogen test labs for qualifying materials, components, tanks, and systems. Martin managed all phases of the hydrogen business: From business case creations, market analysis, construction, and commissioning though operation. He is also a member of various expert groups and technical committees.

Marco Frank Marco Frank is Managing Director of batch2 China and Co-Founder of batch2 assurance UG i.G. With over 10 years of experience in the battery and energy storage industry, including leadership roles at TÜV SÜD in Germany and China, he brings extensive expertise in battery testing, certification, and quality assurance. Based in Shanghai, Marco leads batch2 assurance’s operations in Asia, focusing on supplier assessments, factory audits, production monitoring, and quality assurance for battery energy storage and hydrogen systems.

Lorenz Beister holds an environmental engineering degree and has many years of hydrogen experience, especially in the fields of approval and commissioning. He joined batch2 engineering as senior project engineer in October 2026.

Sabine Miller is a business economist and has many years of marketing experience in the industry. Since November 2026, she is head of marketing for the batch2 group.

Karla Georgina Paz Sosa studied Hydrogen Technology and brings her expertise in hydrogen safety, and staff training into batch2 engineering since April 2026.

Jan Henrik Morath studied Electrical Engineering, worked in the industry and for a research institute, and joined batch2 engineering in May 2026. He brings in his expertise in battery safety, battery production, and end-of-line testing.