Supervisory Board

Ralf Wintergerst

Chairman of the Board

Chairman of the Management Board and CEO Giesecke & Devrient GmbH, Munich

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Ralf Wintergerst
Chief Executive Officer
Giesecke & Devrient GmbH
Prinzregentenstrasse 159
D-81677 Munich

Ralf Wintergerst is Chairman of the Management Board of Giesecke+Devrient (G+D). In addition to his duties as CEO, he is responsible for the Central Services departments of Information Systems, Corporate Security, Compliance Management and Auditing, Corporate Communications, Corporate Strategy, Corporate Development, Mergers & Acquisitions, Legal Services and Corporate Governance.

Wintergerst joined G+D in 1998 as Director of International Subsidiaries in the Cards and Services business. Between 1999 and 2005 he held various management positions in the division Currency Management Solutions, ultimately heading it from 2006 on.

As Group Executive of the business unit Banknote Wintergerst has been a member of the Giesecke+Devrient Management Board since 2013. In November 2016 he was appointed Chairman of the Management Board.

In addition, Wintergerst has been appointed Chairman of the Supervisory Board of secunet Security Networks AG in May 2017.

Wintergerst completed his studies in Business Administration and Economics in Düsseldorf, Dortmund and Hagen.

Memberships of other Supervisory Boards/Controlling Bodies:

  • Member of the advisory board of the Cyber Defense research institute of the Bundeswehr University in Munich

Dr Peter Zattler

Deputy Chairman of the Board

Member of the Management Board and CFO Giesecke & Devrient GmbH, Munich           

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Dr Peter Zattler
Member of the Management Board and CFO
Giesecke & Devrient GmbH
Prinzregentenstrasse 159
D-81677 Munich

Dr Peter Zattler has been a member of the Management Board at Giesecke & Devrient since 1 July 2001.
As CFO, he is in charge of controlling, M&A, the treasury, business accounting and taxes. In addition, Dr Zattler accepted a position as Director of Labour Relations in January 2006.

From 1984 to 1986, Dr Zattler worked in auditing at Arthur Andersen. After obtaining his PhD, Dr Zattler joined the Daimler Benz Group in 1988, where he held various management positions in the finance department. In 1991, he moved to debis AG in Berlin, before going on to join Stuttgart-based debitel GmbH & Co KG in 1993.

From 1998 until his move to Giesecke & Devrient, Dr Zattler was CFO of DaimlerChrysler’s subsidiary MCC smart GmbH in Renningen.

Memberships of other Supervisory Boards/Controlling Bodies:

  • Giesecke & Devrient International Finance S.A., Luxembourg
  • Giesecke & Devrient Matsoukis Security Printing S.A., Athens (Greece)

Prof Dr Günter Schäfer

Professor at the Ilmenau University of Technology                                                                                                                                                                                                                                                                                        

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Prof Dr Günter Schäfer
University professor
Ilmenau University of Technology
Helmholtzplatz 5
D-98693 Ilmenau

Prof Dr Günter Schäfer has been a professor of computer science at the Ilmenau University of Technology since 2005, where he runs the Department of Telematics/Computer Networks. Alongside his teaching and research activities, he is Vice Dean of the Department of Computer Science & Automation (2011–2017), Chair of the Federal Republic of Germany’s IT Faculties Day (2015–2017), trust tutor of Stiftung der Deutschen Wirtschaft (2006-2016), Dean of his Faculty (since 2017) and a member of the German National Research and Education Network’s Law and Security committee.

He started his career as a research assistant at the University of Karlsruhe’s Telematics Institute (today known as the Karlsruhe Institute for Technology) in 1994, before opting to complete a degree in computer science at the institution’s Department of Computer Science.

After obtaining his PhD in 1998 with a thesis on ‘efficient authentication and key management in high-speed networks’, he joined the Ecole National Supérieure des Télécommunications in Paris in 1999, where he worked on projects designed to evaluate and optimise the performance of UMTS access networks and boost network security in fixed and mobile communications networks.

In July 2000, he joined the Technical University of Berlin’s Department of Communications Networks, where he worked on network security and mobile communications projects.

Awards and distinctions:

  • Thuringian Research Award for Applied Research 2013
  • GI/ITG/VDE Communication Software Award 2013
  • German IT Security Award 2010 (3rd place)
  • Klaus Tschira Award for Achievements in Public Understanding of Science 1999

Dr Elmar Legge

Member of the Management Board of RWTÜV e.V., Essen
Member of the Management Board of the RWTÜV Foundation, Essen
Member of the Management Board of the GREIF Foundation, Mülheim a.d. Ruhr

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Dr Elmar Legge
Deputy Chairman of the Board
RWTÜV e.V.
Kronprinzenstrasse 30
D-45128 Essen

Member of the Board at RWTÜV e.V., Essen
Member of the Board at GREIF-Stiftung, Mülheim a.d. Ruhr
Member of the Board at RWTÜV-Stiftung, Essen

Dr Legge has chaired the RWTÜV Group's Management Board since 1991. Alongside his duties as CFO, he was also in charge of corporate finance at TÜV NORD AG in Hanover from 2004 to 2015, of which RWTÜV is a shareholder.

Dr Legge started his career as a research assistant and lecturer at the University of Göttingen's Institute for Production and Investment Research in 1979.

In 1982, Dr Legge moved into the paper industry at the Holzstoff AG Group in Basel, Switzerland. As one of the German paper manufacturer's authorised officers, he was responsible for corporate planning, organisation and IT.

In 1987, Dr Legge became a member of Hamburger Hafen- und Logistik AG's Board of Directors in Hamburg, where he was responsible for corporate planning, controlling and organisation.

Dr Legge has worked for the RWTÜV Group in Essen since 1991.

Memberships of other Supervisory Boards/Controlling Bodies:

  • AHV VVAG, Essen
  • CTC advanced GmbH, Saarbrücken
  • RWTÜV GmbH, Essen
  • TÜV Thüringen e.V., Erfurt
  • VAI Van Ameyde International B.V., Rijswijk/Netherlands

Gesa-Maria Rustemeyer, LL.M.

Employee representative

Head of Legal, secunet Service GmbH, Berlin

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Gesa-Maria Rustemeyer, LL.M.
Head of Legal
secunet Service GmbH
Alt-Moabit 96
10559 Berlin

Gesa-Maria Rustemeyer is an accredited attorney who has been employed at secunet since 2007. She previously completed her degree in law at the European University Viadrina in Frankfurt an Oder and at Humboldt University of Berlin, and passed both the first and second state examinations in Berlin. Ms Rustemeyer went on to start working in the Legal department at the secunet Security Networks AG site in Berlin, completing a Master’s degree in information law at the Carl von Ossietzky University of Oldenburg alongside her professional work.

While doing this, she was involved in managing the increasing demands on the Legal department that arose as the company grew, and ultimately became Head of Legal in 2017. Ms Rustemeyer worked on the reorganization of secunet, which resulted in the spin-off of the Legal department into secunet Service GmbH, among other outcomes. Her role in the secunet Group means that Ms Rustemeyer has regular contact with colleagues in different departments; not only in management but also in sales and product management as well as development. This puts her in a good position to monitor the impact of entrepreneurial decisions on employees’ situations.

As part of the first election for representatives to the Supervisory Board of secunet Security Networks AG In March 2019, one of the two employee representative mandates was transferred to her.

Jörg Marx

Employee representative

Head of Development, secunet Security Networks AG, Dresden

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Jörg Marx
Head of Development
Network&Client Security department
Public Authorities Division
secunet Security Networks AG
Ammonstr. 74,
01067 Dresden

Jörg Marx holds a degree in computer science and joined secunet Security Networks AG in 1999. As an information security advisor and developer, he gained experience in designing solutions and sophisticated products for IT security in industry and for public authorities. His main areas of technical expertise are system security, IP networks, IPsec and Linux.

After further roles in SINA product development, in 2012 the SINA development area was assigned to him, including personnel-related and technical responsibility for its developers, who currently number around 50.

Jörg Marx’s many years of experience mean that he is well-versed in the development process. He believes in treating others with appreciation and fairness, clear communication, and technically excellent development work to create products that fulfil customers’ expectations.

As part of the first election for representatives to the Supervisory Board of secunet Security Networks AG In March 2019, one of the two employee representative mandates was transferred to him.