Wilke Stroman (CEO Germany)

Wilke Stroman (1980, German) has led the German business of mobilezone as CEO Germany since January 2020. He founded the online portal sparhandy.de in 2000 as a sideline to his training as a bank clerk. After successfully completing his training, he first worked in the banking sector in London before moving to Cologne with his company in 2005.

Dieter Kossmeier (Chief Sales Officer B2B)

Dieter Kossmeier (1967) has been Co-Managing Director of mobilezone Deutschland GmbH since December 2020. Prior to his activities for the mobilezone Group, he was Head of New Business, Vectron Systems AG. Between 1997 and 2015, he held various positions at The Phone House Telecom GmbH (formerly Hutchison Telecom GmbH), most recently as Business Unit Manager New Business and IT. He has an education as a software developer and underwent various management trainings.

Daniel Blum (Chief People & Legal Officer)

Daniel Blum (1979) has been with mobilezone since 2010 where he built up the internal legal department. From 2016, he additionally took over the management of the HR department. Since 2021, Daniel Blum has been part of the management of mobilezone Germany and, as Director Legal & People and authorized signatory, is responsible for these areas for all companies of mobilezone Germany. Before joining mobilezone, Daniel Blum worked as a lawyer in national and international commercial law firms. 

Feyzi Demirel (Chief Operations Officer)

Feyzi Demirel (1978) joined the management of mobilezone Deutschland GmbH in 2021 and is responsible for the operations areas Customer Service and Customer Relations. After studying business administration in Münster, he started his career at The Phone House before moving to Telefonica where he held various management positions, including as an authorized signatory and member of the management team at blau Mobilfunk GmbH. In 2015, he joined what is now mobilezone Deutschland.

Mathias Sieg (Chief Financial & Digital Officer)

Mathias Sieg (1977) joined mobilezone Deutschland GmbH in April 2022 as Director Digital & IT. Mathias Sieg is a proven digital expert, founder of a performance marketing agency and entrepreneur and was Managing Director in a full-service internet agency after selling the agency. Before joining mobilezone, he was Managing Director of Resolution Media Germany, which is part of the Omnicom Media Group.