Ohmium International Appoints Veteran Energy Sector Leader as New CEO to Accelerate Global Growth and Scale

Ohmium International, a leading manufacturer of advanced PEM hydrogen electrolyzers, announced the appointment of Dr. Markus Tacke as its new CEO, effective July 1, 2025. With over 22 years of experience at Siemens and a proven track record in the renewable energy sector, Dr. Tacke will drive Ohmium's global expansion and commercialization of its next-generation green hydrogen solutions.

Dr. Tacke has a history of growing companies in energy, infrastructure, manufacturing, and technology. His focus on customer centricity, operational efficiency, and strategic acquisitions has consistently driven growth and value. As CEO of Oerlikon Surface Solutions AG, he achieved 8% annual growth and turned the company from break-even to 9% profitability through regional integration and new business exploration. At Siemens Gamesa Renewable Energy, he streamlined product lines, launched advanced platforms, and initiated a €2.5 billion cost savings program, stabilizing the wind business and launching a high-impact growth strategy.

“Dr. Markus Tacke possesses a rare blend of operational excellence and technical expertise, along with a strong history of scaling businesses,” said Ahmad Chatila, Board Chairman of Ohmium. “His unique combination of skills will be pivotal as we expand globally and deepen our commercial partnerships. We are confident he will help us meet and exceed our ambitious goals.”

Arne Ballantine, the former CEO and co-founder of Ohmium International, has steered the company through its formative years. Under his leadership, Ohmium developed a robust internal PEM supply chain capable of scaling to meet gigawatt-level demand and successfully deployed its products globally across multiple sites.

Ballantine expressed deep enthusiasm and excitement for the company’s future, stating, “Leading Ohmium through its early stages has been an incredible privilege. I am immensely proud of our team and their achievements, including securing numerous patents and gaining industry recognition for our high efficiency, rapidly scalable, and bankable PEM electrolyzer. I have full confidence that Dr. Tacke is the right leader to guide us into the future. I look forward to supporting the transition and seeing the company continue to grow.”

The company is focused on further commercial deployments, manufacturing scale-up, and international market expansion. With the rising global demand for clean, reliable, and affordable energy, Ohmium is well-positioned to assist in the decarbonization of hard-to-abate sectors worldwide.

“I am honored to join Ohmium International at such an exciting inflection point,” said Dr. Tacke. “Ohmium’s technology, team, and culture are extraordinary. I look forward to working alongside our employees, clients, investors, and partners to accelerate the transition to a greener future on a global scale.”

Dr. Tacke earned a Mechanical Engineering degree and a PhD from the Technical University of Darmstadt, Germany, and a Master’s degree in Engineering from Cornell University in New York, USA.

ABOUT OHMIUM

Ohmium designs, manufactures, and deploys modular, scalable Proton Exchange Membrane (PEM) electrolyzers that enable cost-competitive green hydrogen production. The company’s suite of electrochemical products helps customers achieve their sustainable energy goals across various industrial, transportation, and energy projects. Headquartered in the United States with manufacturing facilities in India and operations worldwide, Ohmium has a global green hydrogen project pipeline exceeding 2 GW across three continents. In 2023, Ohmium raised $250 Million in Series C financing, led by TPG Rise Climate.

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