Voytek Siewierski

Investment Partner, Mitsui & Co, Venture Partners

Voytek Siewierski is an investment partner at Mitsui Venture Partners, Silicon Valley office, in charge of mobile and wireless. Before joining MCVP team Voytek was a Senior Executive Director at NTT DoCoMo including 6 years in Japan and 3 years in the UK. After participating in the carrier’s IPO at Tokyo Stock Exchange he coordinated DoCoMo’s international technology partnerships including the partnership with Sun Microsystems that brought Java to mobile phones. Developed a number of successful value added mobile services with partners such as Walt Disney Corporation, Warner Brothers, CNN and others. Voytek executed a number of international equity investments in cellular carriers in Europe and Asia and initiated a number of technology licensing projects between DoCoMo and mobile operators such as KPN Mobile in Holland, Telefonica in Spain, Boygues Telecom in France and KG Telecom in Taiwan. Between 2004 and 2006 he was in charge of DoCoMo venture investment in Europe. His previous experience includes consulting and technology research in the United States and Europe. A visiting lecturer at the University of Oxford, teaching telecommunications and judge in several technology awards programs, including Tech Pioneers of the World Economic Forum in Davos and Mobile Innovation Awards of the GSM Association. Holds M.A.L.D from the Fletcher School of Law and Diplomacy (Tufts University/Harvard). Graduate courses in IT and International Marketing at the Harvard Business School. Voytek speaks English, Polish, Russian and Japanese. His three sons were born in Boston and educated in International Schools in Yokohama and London.