Skip to main content
The engine company. DEUTZ®

The Supervisory Board of DEUTZ AG

1) Supervisory board members elected by the shareholders
2) Employee representative on the Supervisory Board

Dr Dietmar Voggenreiter 1)
Supervisory Board Chairman
Member of the Supervisory Board since 30 April 2019, Supervisory Board Chairman since February 12, 2022, appointed until the Annual General Meeting 2023
Resident in Ingolstadt, management consultant, Horváth & Partners Automotive Competence Center, Munich, former member of the Board of Management with responsibility for marketing and sales at AUDI AG, Ingolstadt

Personal information
Date of birth: 4 January 1969    
Place of birth: Schwäbisch Hall, Germany 

Education

Studied business administration with a focus on technology at the University of Stuttgart    

Degree: postgraduate degree in business administration (Diplom-Kaufmann) with a focus on technology

Doctorate (Dr rer.pol.) from the University of Stuttgart
 

Career history
1997
Senior consultant at Horváth & Partners GmbH, Stuttgart

1999
Principal and authorised signatory (Prokurist) at Horváth & Partner AG, Zurich, Switzerland; from 2000 also Head of the Automotive Industries Competence Center, Horváth & Partner, for Germany, Austria and Switzerland (DACH region)

2002
Head of Corporate Controlling at AUDI AG, Ingolstadt

2005
Head of Corporate Strategy at AUDI AG, Ingolstadt

2007
Head of Business in China at AUDI AG, Ingolstadt

2009
President of AUDI CHINA Enterprise Mgmt. Co. Ltd., Beijing, PR China; from 2013: also Executive Vice President for China at AUDI AG, Ingolstadt

2015
Member of the Board of Management with responsibility for marketing and sales at AUDI AG, Ingolstadt

Since 2018
Senior advisor at Horváth & Partners Automotive Competence Center, Munich

Summary of relevant activities alongside the Supervisory Board membership:
Dr Dietmar Voggenreiter’s main occupation is management consultant.

Sabine Beutert 2)
Deputy Chairwoman
Member of the Supervisory Board since 30 April 2013, Deputy Chairwoman since September 21, 2022, appointed until the Annual General Meeting 2023
Trade Union Secretary, IG Metall Administrative Office, Cologne-Leverkusen, Cologne, Germany, resident in Cologne 

Personal information

Date of birth: 7 December 1959
Place of birth: Miltenberg, Germany

Education
Studied economics at Philipps University, Marburg, Germany
Degree: ‘Diplom’ (postgraduate-level degree) in Economics 

Post-graduate studies in computer science, Marburg

Career history
1986
Neckermann Versand AG, Frankfurt, Germany
Marketing planner/customer information systems

1987
Technology advisory service of the Confederation of German Trade Unions (North Rhine-Westphalia), with the following functions:
Advisor, Head of Training, Head of Labour and Economics, and member and Chair of the Works Council
Trade union representative of the ver.di trade union on the Supervisory Board of Stadtwerke Düsseldorf AG 

2008
IG Metall Cologne-Leverkusen branch, Cologne
Trade union secretary 

2013 
Trade union representative on the Supervisory Board of DEUTZ AG

Helmut Ernst 1)
Member of the Supervisory Board since 27 April 2023, appointed until the Annual General Meeting 2028
Resident in Burgwald, self-employed management consultant, former Senior Vice President ZF Division Aftermarket & Global Executive Team ZF AG, Schweinfurt & Friedrichshafen

Personal data
Date of birth: March 1, 1960
Place of birth: Frankenberg/Eder

Education
University of Giessen
Degree: Engineering

Career History
1985 – 1991
Head of Operations, Continental plant Korbach

1990 – 1992
Production Manager, Bicycle Tires and Tubes, Vehicle Replacement Tires, Continental Korbach Plant

1992 – 1996
Managing Director JV, Continental/Vittoria Tyres Thailand

1996 – 2001
Key Account Management ASIA, 2-Wheel Tires Continental, Bangkok/Thailand

2001 – 2006
Business Unit Manager 2-Wheel Tires Continental, Korbach

2006 – 2014
Vice President Independent Aftermarket and Managing Director, Continental Aftermarket GmbH, Frankfurt

2014 – 2021
Senior Vice President ZF Division
Aftermarket & Global Executive Team ZF AG, Schweinfurt & Friedrichshafen

Since 2022
Self-employed management consultant

Overview of significant activities in addition to the Supervisory Board mandate:
Mr. Helmut Ernst works full-time as an independent management consultant.

Melanie Freytag 1)
Member of the Supervisory Board since 27 April 2023, appointed until the Annual General Meeting 2028
Resident in Frankfurt am Main,
Chief Financial Officer, Interzero Group, Berlin

Personal data
Date of birth: February 16, 1975
Place of birth: Essen

Education
Université catholique de Louvain (UCL), Belgium
Degree: MA (DES), Financial Economics

University of Kent, Canterbury, United Kingdom
Degree: BA (Hons), European Economics with Econometrics

Université de la Réunion, France
Degree: BA (Lic.), Finance and International Economics

Career History

1999
Consultant / Assistant Manager at KPMG,
Frankfurt am Main

2001
Project Manager / Vice President in the area of European Business Development and Finance at Winterthur Insurance, Wiesbaden

2004
Senior Project Manager, Corporate Department Mergers & Acquisitions, ThyssenKrupp Services, Düsseldorf

2007
Chief Financial Officer, thyssenKrupp Xervon Sweden, Stockholm, Sweden

2009
Chief Financial Officer, thyssenkrupp Elevator, Regional Center RUESA (Russia, Eastern Countries, Switzerland, Austria), Vienna, Austria

2014
Chief Financial Officer, Coperion, Stuttgart

2017
Chief Financial Officer, Klöckner Metals France, Paris, France

2018
Head of Corporate Controlling & Development / Mergers & Acquisitions, Klöckner & Co, Duisburg

Since 2020
Chief Financial Officer, Alba Services / Interzeron Group, Berlin

Overview of significant activities in addition to the Supervisory Board mandate:
Ms. Melanie Freytag’s full-time position is as Chief Financial Officer of Interzero Group, Berlin.

Yavuz Büyükdag 2)
Member of the Supervisory Board since 26 April 2018, appointed until the Annual General Meeting 2023
Member of DEUTZ AG Works Council, Cologne, Germany, resident in Cologne, Germany

Personal information

Date of birth: 22 November 1972
Place of birth: Cologne

Education
Klöckner-Humboldt-Deutz AG, vocational apprenticeship as a milling machine operator, specialising in lathe technology

Studied at the European Academy of Labour, Frankfurt, Germany, with a focus on social policy, economics and labour law

Career history
1992
DEUTZ AG, Cologne
Employed in tractor production, assembly-line and stationary production, and mechanical fabrication

2006
Member of the Works Council of DEUTZ AG, Cologne
Representing the interests of employees, creating shift plans and negotiating basic principles for the transfer of undertakings, reconciliation of interests required by German law, redundancy scheme, personnel planning
Committee work: Works, Human Resources and Economic Committees

2010
Member of the DEUTZ AG Works Council, Cologne, on paid release

2018
Employee representative on the Supervisory Board of DEUTZ AG

Dr Fabian Dietrich 2)
Member of the Supervisory Board since 26 April 2018, appointed until the Annual General Meeting 2023
Senior Vice President Legal at DEUTZ AG, Cologne, Germany, resident in Bonn, Germany

Personal information

Date of birth: 10 June 1978
Place of birth: Karlsruhe, Germany

Education
Studied law at the University of Bonn
Degree: doctorate in law (Dr jur) from the University of Bonn

Career history
2007
Lawyer with the international law firm Freshfields Bruckhaus Deringer LLP, Cologne, spending almost a year at the firm’s Brussels office and ten months on secondment in the legal affairs department of an international energy company

2016
Corporate lawyer at DEUTZ AG, Cologne

2017
Corporate lawyer and General Counsel at DEUTZ AG, Cologne 

2018
Senior managers’ representative on the Supervisory Board, DEUTZ AG, Cologne
Chairman of the Senior Managers Committee of DEUTZ AG, Cologne

Dr Ing Rudolf Maier 1)
Member of the Supervisory Board since 7 October 2020, appointed until the Annual General Meeting 2023
Freelance management consultant, former Executive Vice President of Bosch Diesel Systems, Stuttgart, with responsibilities for research and development as well as for the business unit injection systems for commercial vehicles and off road, resident in Stuttgart.

Personal information       
Date of birth: 17 October 1957        
Place of birth: Schönau

Education 
Studied mechanical engineering at the University of Stuttgart, specialising in control systems and thermal turbomachinery      
Degree: Doctorate in Engineering (Dr Ing) from the University of Stuttgart

Career history
1989
Bosch Diesel Systems, group leader, measurement technology and tolerance issues

1993
Bosch Diesel Systems, group leader/head of department, development of distributor injection pumps          

1997          
Bosch Diesel Systems, system area manager, time-controlled single pump systems

2001                      
Bosch Diesel Systems, business unit manager, injection systems for commercial vehicles

2007          
General Manager of Bosch Automotive Diesel Systems Co. Ltd, Wuxi, China

2011          
Executive Vice President of Bosch Diesel Systems with responsibility for development

2014          
Executive Vice President of Bosch Diesel Systems with responsibility for the business unit injection systems for commercial vehicles & off road

Since 2018
Freelance management consultant 
Supervisory Board Chairman of Bosch Engineering GmbH, Abstatt, Germany
Supervisory Board Chairman of ITK Engineering GmbH, Rülzheim, Germany
Vice Chairman Weifu High Technology Group, Wuxi, China (until May 2021)

Summary of relevant activities alongside the Supervisory Board membership:
In addition to his work as a freelance management consultant, Dr Ing Rudolf Maier currently serves as chairman of the Supervisory Board of Bosch Engineering GmbH, Abstatt, Germany, as well as chairman of the Supervisory Board of ITK Engineering GmbH, Rülzheim, Germany.

Hans-Peter Finken 1)
Member of the Supervisory Board since 1 February 2015, appointed until the Annual General Meeting 2023
Member of DEUTZ AG Works Council, Cologne, Germany, resident in Herzogenrath, Germany

Personal information

Date of birth: 20 February 1960
Place of birth: Merkstein, Germany

Education
Studied electrical engineering at Aachen University of Applied Sciences, with a focus on communications technology, degree: Dipl.-Ing. (FH)

Career history
1989
Worked as a developer and project manager in business start-ups and engineering firms

1997
DEUTZ AG, Cologne
Developer, project manager and team leader in engine electronics,
series production electronics, data management and diagnostic systems

2011 
Member of IG-Metall

2014 
Member of the DEUTZ AG Works Council, Cologne, on paid release
Member of the General Works Council of DEUTZ AG

2015 
Employee representative on the Supervisory Board of DEUTZ AG

2016
Deputy Chairman of the Works Council of DEUTZ AG, Cologne

Patricia Geibel-Conrad 1)
Member of the Supervisory Board since 26 April 2018, appointed until the Annual General Meeting 2023
Director of her own audit/tax advice business, management consultant, resident in Leonberg, Germany 

Personal information
Date of birth: 15 January 1962   
Place of birth: Frankfurt/Main, Germany

Grew up in Asunción, Paraguay (South America) – completed a baccalaureate in humanities and sciences; obtained a German university entrance qualification (Abitur) in Hamburg, Germany

Education
Studied business economics at Goethe University Frankfurt and at the University of Hohenheim in Stuttgart
Degree: ‘Diplom’ (postgraduate-level degree) in Business Economics

Career history
1987      
Auditing assistant/senior consultant at Dr. Lipfert GmbH, Wirtschaftsprüfungsgesellschaft, Stuttgart

1991  
Qualified as a tax advisor

1994 
Qualified as an auditor

1995  
Director of her own audit business, management consultancy work in cooperation with KPMG, Wirtschaftsprüfungsgesellschaft, Buenos Aires, Argentina

1998  
Moved abroad to Mexico City, Mexico

2001
Engagement leader and authorised signatory (Prokuristin) at PricewaterhouseCoopers AG, Wirtschaftsprüfungsgesellschaft, Stuttgart

Since 2015   
Director of her own audit and tax advice business in Leonberg 

2015 - 2022
Member of the Supervisory Board and of the Audit Committee of HOCHTIEF Aktiengesellschaft

Since 2018  
Member of the Supervisory Board and chairwoman of the Audit Committee of CEWE Stiftung & Co. KGaA, Oldenburg

Since 2020
Member of the Advisory Board of FEA – Financial Experts Association e.V., Bremen

Since 2022
Vice chairwomen of the Supervisory Board and chairwomen of the Audit Committee of NEMETSCHEK SE, Munich

Summary of relevant activities alongside the Supervisory Board membership:
In addition to the operation of her own audit and tax advice business and her work as a management consultant, Patricia Geibel-Conrad serves as a member of the Supervisory Board and chairwoman of the Audit Committee of CEWE Stiftung & Co. KGaA, Oldenburg, as a member of the Advisory Board of FEA - Financial Experts Association e.V., Bremen, as well as vice chairwomen of the Supervisory Board and chairwomen of the Audit Committee of NEMETSCHEK SE, Munich.

Bernd Maierhofer 1)
Member of the Supervisory Board since 27 April 2023, appointed until the Annual General Meeting 2028
Resident in Munich, self-employed management consultant, former CTO der MAN Nutzfahrzeuge AG

Personal data
Date of birth: May 5, 1960
Place of birth: Munich

Education
Technical University of Munich, Mechanical Engineering
Degree: Intermediate diploma

HM University of Applied Sciences Munich, Electrical Engineering
Degree: Diploma

Career History
1992 – 1998
Engineer, MAN Nutzfahrzeuge AG

1999 – 2006
Head of Department, Electronic Systems, MAN Nutzfahrzeuge AG

2006 – 2008
Managing Director of the Heavy Trucks Business Unit, MAN Nutzfahrzeuge AG

2008 – 2015
Management Board member responsible for Strategy & Portfolio Development, Research & Development Trucks, Buses, Powertrains (CTO) (from 2009) and Purchasing (from 2010), MAN Nutzfahrzeuge AG

Since 2016
Self-employed management consultant

Overview of significant activities in addition to the Supervisory Board mandate:
Mr. Bernd Maierhofer currently performs his duties as a member of the Supervisory Board of VOSS Automotive GmbH, Wipperfürth, in addition to his full-time occupation as an independent management consultant.

Corinna Töpfer-Hartung 2)
Member of the Supervisory Board since 26 April 2018, appointed until the Annual General Meeting 2023
Member of DEUTZ AG Works Council, Cologne, Germany, resident in Bad Honnef, Germany

Personal information

Date of birth: 9 October 1965
Place of birth: Wolmirstedt, Germany

Education
Vattenfall Europe AG (Boxberg power station), 
vocational apprenticeship in industrial and measurement technology and control engineering, spokeswoman for the apprentices, completed apprenticeship early

Studied at the School of Electrical and Mechanical Engineering in Eisleben, specialising in industrial electronics,
degree: Dipl.-Ing. (FH) Industrial Electronics 

Career history
1987
Electronics technician at an engineering firm in Magdeburg, Germany

1990
Electrical engineer at Ferchau Konstruktion GmbH, Mannheim, Germany

1996
Motorenwerke Mannheim GmbH (formerly DEUTZ AG) 
Development engineer, member of the gas engine research team, Mannheim

1999
DEUTZ AG, Cologne
Development engineer, member of the electronics and overall systems team, Cologne

2001
Management responsibility as team leader in assembly, responsible for the entire 
cable harness assembly 

2013
Management responsibility as the Head of the Base Engine Department, responsible for the assembly of fuel injection equipment, ancillary components and engine electrics

2017
Member of the DEUTZ AG Works Council, Cologne, on paid release

2018
Chairwoman of the Works Council of DEUTZ AG, Cologne
Chairwoman of the General Works Council of DEUTZ AG, Deputy Chairwoman of the Supervisory Board of DEUTZ AG

Ali Yener 2)
Member of the Supervisory Board since 26 April 2018, appointed until the Annual General Meeting 2023
First authorized representative and managing director of IG Metall Koblenz, resident in Koblenz, Germany

Personal information

Born: 1971
Place of birth: Karadeniz Ereğli, Turkey

Education
Hoesch Rohr AG, Hamm, Germany, vocational apprenticeship as an industrial mechanic, specialising in operating technology

Studied at the European Academy of Labour, Frankfurt, Germany

Career history
1989
Hoesch Rohr AG, Hamm, Westphalia, Germany

1992
Chairman of the Youth and Apprentice Council

1993 
Completed vocational apprenticeship, employed in maintenance

1994
Elected to the Works Council, representative of IG Metall Hamm

2001
Trade union secretary of IG Metall Koblenz

2013
Chief Representative, Managing Director and Treasurer of IG Metall Koblenz

2014
Alternating Chairman of the Vocational Training Committee of the Koblenz Chamber of Trades
Member of the Vocational Training Committee of the Koblenz Chamber of Industry and Commerce 
Member of the Management Committee of the Koblenz-Mayen Employment Agency 

2018
Employee representative on the Supervisory Board of DEUTZ AG

2019
Deputy Chairman of the Supervisory Board of ZF Active Safety GmbH, Koblenz