Sistema
Mr Sommer is very active in the area of corporate governance, he is chairman of the Supervisory Board of MTS Ukraine, member of the Supervisory Board of Munich Reinsurance, Germany, and member of the Board of Directors of Tata Consultancy Services, India.
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Sistema
"Sistema" is the largest diversified publicly-traded investment company in Russia and the CIS, which invests in and is a major shareholder of companies serving over 100 million customers in the sectors of telecommunications, high technology, oil and energy, radars and aerospace, banking, retail, mass-media, tourism, and healthcare services.