Member of the Supervisory Board since 2017
Chairman of the Management Board and CEO of Giesecke+Devrient GmbH, Munich
Chief Executive Officer
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.
Wintergerst holds various positions related to IT security issues, including member of the advisory board of the Cyber Defense research institute of the Bundeswehr University in Munich and co-chair of the Digital Summit Platform "Security, Protection and Trust" of the Federal Ministry of the Interior. Since mid-2019, he took over as chair of the North Africa Middle East Initiative of German Business (NMI) and has also become a member of the Executive Committee of Germany's digital association, Bitkom.
Ralf Wintergerst studied Business Administration and holds a Master´s Degree in Management as well as in Politics, Philosophy and Economics.
- Cyber Defence research institute, Bundeswehr University Munich
- Chairman of the shareholders' committee of veridos GmbH
Dr Peter Zattler
Member of the Supervisory Board since 2004
Member of the Management Board of Giesecke+Devrient GmbH, Munich
Dr Peter Zattler
Member of the Management Board and CFO
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, Zattler accepted a position as Director of Labour Relations in January 2006.
From 1984 to 1986, Zattler worked in auditing at Arthur Andersen. After obtaining his PhD, 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, Zattler was CFO of DaimlerChrysler’s subsidiary MCC smart GmbH in Renningen.
- Veridos Matsoukis S.A., Athens, Greece
- Member of the shareholders' committee of veridos GmbH
- Managing Director Giesecke+Devrient Immobilien Management GmbH
- Managing Director Giesecke+Devrient Immobilien-Verwaltungsgesellschaft GmbH
Dr Elmar Legge
Member of the Supervisory Board since 1999
Member of the Management Board of the GREIF Foundation, Mülheim an der Ruhr
Dr. Elmar Legge was a member of the Managing Board of the RWTÜV Group from 1991 to 2020. 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.
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, 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, 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 had been working for the RWTÜV Group in Essen since 1991; he retired on 1 October 2020 on age-related grounds.
Dr. Legge has been a member of the board of the GREIF Foundation, which promotes projects in the fields of technology and culture, since 2001.
- RWTÜV GmbH, Essen
- TÜV Thüringen e.V., Erfurt
- AKTAIOS GmbH, Essen
Member of the Supervisory Board since 2019
Head of Development
Network&Client Security department
Public Authorities Division
secunet Security Networks AG
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.
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.
Member of the Supervisory Board since 2019
Gesa-Maria Rustemeyer, LL.M.
Head of Legal
secunet Service GmbH
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. 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. 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 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.
Prof Dr-Ing Günter Schäfer
Member of the Supervisory Board since 2014
University professor, University of Technology, Ilmenau
Prof Dr-Ing Günter Schäfer
Ilmenau University of Technology
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, Schäfer 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