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+49 611 71186757 (Office)
Mainzer Str. 97
Wiesbaden, Germany 65189
Mr. Warkentin acts as managing director of J.S. Held GmbH Germany. With a background as Business Administrator and proven experience in project controlling, commercial, project financing & project management of large scale international infrastructure projects. Mr. Warkentin has been working more than 25 years in leading management positions for multinational companies in the field of telecommunications, power generation, and oil & gas.