Michael Mack, Dipl.-Math. oec., is the commercial director of Global Energy Solutions and responsible for the areas of finance, controlling and general administration. After studying business mathematics at the University of Ulm with semesters abroad at San Diego State University, he began his professional career in the finance department of SmithKline Beecham Pharma. He then worked for the Etimex Group (plastics processing) for almost 20 years, including over 15 years as Head of Finance and Controlling for the entire corporate group.