Voith Turbo Board of Management

Interim CEO of Voith Turbo is Dirk Hoke.

Since January 2024, he has been a member of the Board of Management of Voith Turbo and responsible for Finance and Controlling.

In 2020, he moved to Faurecia Clarion Electronics Co. in Japan as Global CFO and was responsible for the markets US, Europe, India, Thailand, China and Japan.

Most recently, from 2018 to 2020, he was CFO / Executive Vice President & Administration responsible for Finance, Logistics/Indirect Purchasing, HR/IT and Audits/Data Security/Compliance at Bosch Corp. in Tokyo/Japan.

In 2010, he became President and Managing Director of Robert Bosch Automotive Technologies in Rayong/Thailand and joined the Chassis System Control Division in Abstatt as Global CFO / Senior Vice President Finance & Controlling in 2014.

From 1998 to 2010, he held various positions at Robert Bosch. Initially as Financial Controller and Assistant to the CEO at the Belgian headquarters in Brussels; from 2003 to 2006 as Manager Finance & Controlling at the Division Power Tools in Leinfelden; from 2006 to 2009 as Head of Department Finance & Controlling in Saitama/Japan.

After graduating with a degree in business administration in 1993, he began his career as a financial analyst at Aachener und Münchener Immobilien GmbH in Aachen.

Alexandre Riesterer studied Commercial Sciences at the HEC Management School of the University of Liège/Belgium.

Dr. Ralf Geßlein has been a member of the Management Board of Voith Turbo since May 2022 and heads the Industry Division.

Most recently, as CEO, he was responsible for Siemens' global wind generator business, which he integrated into the Flender Group in 2020 and successfully continued.

From 2005, he worked for Siemens in various functions, including Vice President Product Management Large Drives Industry, Senior Vice President Drive Systems and Executive Vice President Oil & Gas and Process Industries.

Dr. Ralf Geßlein studied electrical engineering (specializing in power engineering) at the University of the Federal Armed Forces in Munich and received his doctorate in control engineering.

Since December 2025 Müslüm Yakisan is responsible for the Marine & Rail Division.

Since June 2024, Dr. Marcus Fischer has been a member of the Board of Management of Voith Turbo and was appointed CEO of the ARGO-HYTOS Group. He will fulfil the COO position in a dual role until further notice.

At the beginning of 2016, his path led him to the ARGO-HYTOS Group, where he still holds the position of COO for the entire Group. 

Dr. Marcus Fischer has been with ARGO-HYTOS for 17 years. He started as Head of Engineering in 2007, and in 2010 he joined the management of ARGO-HYTOS GmbH in Kraichtal and simultaneously took on the role of Group CTO. 

Before joining ARGO-HYTOS, Marcus Fischer was Head of Engineering at Weber-Hydraulik GmbH, where he was responsible for design, development and advanced engineering. 

Dr. Marcus Fischer studied Mechanical Engineering at the Technical University of Aachen (RWTH Aachen) and the University of Dortmund.