Investment Advisory Professional, Co-Head DACH, Member of the Investment Advisory Committee of Triton Partners, Frankfurt am Main, Germany (employed by Triton Beratungsgesellschaft GmbH)
Member of the Following Committees: Mediation Committee, Nomination Committee, Personnel Committee
- Year of Birth: 1974
- Citizenship: German
- Initial Order: 2023
- Term: until 2028
Education | |
1997 – 1999 | BA European Business, Dublin Business School, Irland |
1999 - 2001 | Diplom Betriebswirt (degree in business administration), ESB Reutlingen Business School |
Professional Career | |
2001 – 2004 | Associate, Credit Suisse First Boston Frankfurt, Germany, and London, United Kingdom |
2004 - 2007 | Associate, Court Square Capital Partners London, United Kingdom |
since 2007 | Investment Advisory Professional / Co-Head DACH / |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- Managing Director of Triton Beratungsgesellschaft GmbH, Frankfurt, Deutschland (since 2016)
- Member of the advisory board of Kelvion Holding GmbH, Bochum, Germany (since 2018)
Previously:
- Member of the advisory board – Ewellix, Kelvion (2019 to 2023)
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Previously:
- None.
Other than listed above, Claus von Hermann has not been a member of any administrative, management or supervisory body of any other company or partnership outside the Group within the last five years.
Joint Works Council Chairman of RENK GmbH, Works Council Chairman of RENK GmbH, Augsburg, Works Council Chairman of RENK Test System GmbH
Member of the Following Committees: Audit Committee, Mediation Committee, Personnel Committee
- Year of Birth: 1966
- Citizenship: German
- Initial Order: 2023
- Term: until the next election of the employee representatives (approximately 2026)
Education | |
1981 – 1985 | Machinist Apprenticeship, RENK AG |
Professional Career | |
1985 – 2014 | CNC Operator, RENK AG |
1998 – 2014 | Member of the Works Council, RENK AG |
2014 – 2018 | Deputy Works Council Chairman RENK AG and RENK Test System GmbH |
since 2018 | Works Council Chairman, RENK GmbH (formerly RENK AG) and RENK Test System GmbH |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- None.
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Other than listed above, Klaus Refle has not been a member of any administrative, management or supervisory body of any other company or partnership outside the Group within the last five years.
First Authorised Representative and Treasurer of IG Metall Hannover
Member of the following committees: Audit committee
- Year of Birth: 1977
- Citizenship: German
- Initial Order: 2023
- Term: until the next election of the employee representatives (approximately 2026)
Education | |
1994 – 1998 | Professional training: Industrial Mechanic, Volkswagen Commercial Vehicles, Hannover |
2002 – 2006 | Studies and Degree: Diploma in Commercial and Labor Law, University of Hamburg |
Professional Career | |
1998 – 1999 | Worker, Volkswagen Commercial Vehicles, Hannover |
1999 – 2000 | Alternative civilian service, HVHS Springe e.V., Springe |
2000 – 2002 | Worker, Volkswagen Nutzfahrzeuge, Hannover |
2006 – 2007 | Trainee program, IG Metall, Frankfurt |
2007 – 2016 | Trade Union Secretary, IG Metall Hannover, Hannover |
2016 – 2017 | Treasurer, IG Metall Hannover, Hannover |
2017 – 2023 | Second Authorised Representative and Treasurer, IG Metall Hannover, Hannover |
since 2023 | First Authorized Representative and Treasurer, IG Metall Hannover, Hannover |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- Member of the Supervisory Board of WABCO GmbH (since 2018)
- Member of the Supervisory Board KraussMaffei Group GmbH, Vaterstetten, Parsdorf, Deutschland (since 2017)
- Deutsche Messe AG, Hannover (2023)
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Other than listed above, Sascha Dudzik has not been a member of any administrative, management or supervisory body of any other company or partnership outside the Group within the last five years.
Works Council Chairman of RENK GmbH, Rheine
Deputy Joint Works Council Chairman, RENK GmbH
Member of the Following Committees: Mediation Committee
- Year of Birth: 1968
- Citizenship: German
- Initial Order: 2023
- Term: until the next election of the employee representatives (approximately 2026)
Education | |
1985 – 1988 | Industrial Machinist Apprenticeship, RENK-Tacke GmbH |
1997 – 2024 | Periodic advanced training on works council issues, IG Metall |
Professional Career | |
1988 – 1990 | Industrial Machinist on turning lathe, RENK AG, Rheine |
1990 – 2000 | Industrial Machinist on various conventional machines, RENK AG, Rheine |
2000 – 2017 | Industrial Machinist at various CNC machining centers, RENK AG, Rheine |
2017 – 2017 | Chairman of Deputy Works Council, RENK AG, Rheine |
2017 – 2018 | Chairman of Works Council, RENK AG, Rheine |
since 2018 | Chairman of Works Council RENK GmbH, Rheine |
since 2022 | Deputy Chairman of the Economic Committee of RENK GmbH |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- None.
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Other than listed above, Lothar Evers has not been a member of any administrative, management or supervisory body of any other company or partnership outside the Group within the last five years.
Chief Operating Officer of KNDS Deutschland GmbH & Co. KG
Member of the following committees: -
- Year of Birth: 1976
- Citizenship: German
- Initial Order: 2024
- Term: until 2028
Education | |
1999 | Degree: Dipl. Ing. Elektrotechnik (electrical engineering) Baden-Wuerttemberg Cooperative State University |
Professional Career | |
1999 – 2008 | Mercedes Benz AG: Various positions in quality and purchasing |
2008 – 2011 | Head of Quality Engineering Center Mercedes Benz |
2011 – 2014 | Head of localization project Mercedes-Benz Beijing and plant logistics |
2014 – 2017 | Division Manager Supply Chain Mercedes-Benz S-/E-Klasse and plant Sindelfingen |
2018 | Head of Production Network Components and Structural Parts Casting/ Forging Mercedes-Benz PKW |
2019 – 2023 | Head of Production Europe/Africa and Start-up factory of Mercedes Benz AG PKW |
Since 2023 | Chief Operating Officer, KNDS Deutschland GmbH & Co. KG |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- Chief Operating Officer of KNDS Deutschland GmbH & Co. KG
Previously:
- Chairman of the Supervisory of Mercedes-Benz Manufacturing Hungary Kft. (2021 to 2023)
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Previously:
- Non-Executive Director of Mercedes-Benz South Africa Ltd. (2019 to 2023)
Other than listed above, Florian Hohenwarter has not been a member of any administrative, management or supervisory body of any other company or partnership outside the group within the last five years.
Head of Corporate Accounting, RENK Group, Augsburg
Member of the Following Committees: -
- Year of Birth: 1976
- Citizenship: German
- Initial Order: 2023
- Term: until the next election of the employee representatives (approximately 2026)
Education | |
2001 | Commercial degree (Diplom-Kauffrau), University of Augsburg |
2001 | Bachelor of Science in Business Administration, University of Augsburg |
Professional Career | |
2002 – 2006 | Accountant in the accounting and taxation division, Deloitte & Touche GmbH, Augsburg |
2006 - 2008 | Senior Accountant in the accounting and taxation division, Deloitte & Touche GmbH, München |
2008 – 2013 | Chief Accountant, RENK Test System GmbH, Augsburg |
2013 - 2016 | Head of Accounting & Controlling, RENK Test System GmbH, Augsburg |
2016 - 2020 | Director of Commercial Management, |
2020 – 2022 | Head of Finance Department, RENK GmbH (until 2021 RENK AG), Augsburg |
since 2022 | Head of Corporate Accounting, RENK Group, Augsburg |
Since 2023 | Head of Operational Accounting/ Commercial order processing RENK Group AG/Renk GmbH/Renk Test System GmbH |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- None.
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Other than listed above, Adela Lieb has not been a member of any administrative, management or supervisory body of any other company or partnership outside the group within the last five years.
Independent consultant and supervisory board member
Member of the Following Committees: Audit Committee, Nomination Committee
- Year of Birth: 1984
- Citizenship: German/Austrian
- Initial Order: 2023
- Term: until 2028
Education | |
2006 – 2009 | Baden-Wuerttemberg Cooperative State University |
2013 – 2015 | CFA Institute |
Professional Career | |
2009 – 2010 | Financial Group Controller |
2011 – 2013 | Senior Associate |
2014 – 2018 | Portfolio Monitoring & Development Professional |
2018 – 2025 | Investment Advisory Professional |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- None.
Previously:
- Advisory Board Member of Talis Management Holding GmbH, Heidenheim, Germany (until 2023)
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Other than listed above, Johannes Meier has not been a member of any administrative, management or supervisory body of any other company or partnership outside the Group within the last five years.
Independent management consultant
Member of the following committees: Personnel Committee (Chair), Nomination Committee (Chair)
- Year of Birth: 1972
- Citizenship: German
- Initial Order: 2024
- Term: until 2028
Education | |
1991 – 1996 | Diplom Kauffrau (FH), Business Administration, University of Applied Sciences Dresden |
2001 | PED Program for Executive Development, IMD, Lausanne, Switzerland |
Professional Career | |
1996 – 1999 | Senior Consultant Audit, Arthur Andersen Wirtschaftsprüfungsgesellschaft mbH, Munich |
1999 – 2002 | Senior Associate, UBS Capital GmbH, Munich |
2002 – 2012 | Partner, BC Partner Beteiligungsberatungs GmbH, Hamburg |
2008 – 2013 | Advisory Board Member, SGB-SMIT Group, Regensburg |
2010 – 2020 | Member of the supervisory board / member of the audit committee, Brenntag SE, Essen |
2013 – 2014 | Member of the Group Executive Committee and Advisor to its shareholders, VAT Group AG, Switzerland |
2015 – 2023 | Independent Management Consultant, Hamburg |
2015 – 2023 | Member of the Supervisory Board / Member of the Audit Committee, Member of the Investment Committee, Jenoptik AG, Jena |
2017 – 2023 | Member of the Supervisory Board, Lufthansa Technik AG, Hamburg |
2018 – 2020 | Member of the Supervisory Board / Member of the Audit Committee, Franz Haniel & Cie. GmbH |
2020 – 2023 | Chair of the Supervisory Board / chair of the personnel committee / member of the audit committee, Franz Haniel & Cie. GmbH |
2020 – 2023 | Chair of the Supervisory Board / Chair of the Transformation & ESG Committee / Chair of the Nomination & Remuneration Committee, Brenntag SE, Essen |
2023 – 2024 | Managing Director, Kühne Holding AG, Schweiz |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- Member of the Advisory Board and Chair of the Risk and Audit Committee of Engel & Völkers Holding GmbH, Hamburg
Previously:
- Chair of the Supervisory Board and of the Personnel Committee as well as Member of the Audit Committee of Franz Haniel & Cie GmbH, Duisburg (until 2023)
- Member of the Supervisory Board of Lufthansa Technik AG, Hamburg (until 2023)
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Previously:
- Chair of the Supervisory Board, of the Transformation and ESG Committee and of the Nomination and Remuneration Committee of Brenntag SE, Essen (until 2023)
- Member of the Supervisory Board, of the Audit Committee as well as member of the Investment Committee of Jenoptik AG, Jena (until 2023)
Other than listed above, Doreen Nowotne has not been a member of any administrative, management or supervisory body of any other company or partnership outside the Group within the last five years.
1st Authorized Representative and Treasurer IG Metall Augsburg, Augsburg
Member of the Following Committees: Personnel Committee
- Year of Birth: 1976
- Citizenship: German
- Initial Order: 2024
- Term: until the next election of the employee representatives (approximately 2026)
Education | |
1992 – 1995 | Hair dressing apprenticeship |
2000 – 2002 | Logistics specialist apprenticeship, AUDI AG, Ingolstadt |
2007 – 2008 | Studies at the Academy of Labor, Goethe University, Frankfurt am Main |
2008 – 2009 | Trainee program IG Metall |
Professional Carrer | |
1995 – 2000 | Hair dresser |
2002 – 2007 | Logistics Specialist, Audi AG, Ingolstadt |
2009 – 2015 | Educational Expert in Adult Education / IG Metall training center, Beverungen |
2015 – 2017 | Trade Union Secretary of IG Metall Executive Board (trade union educational work) |
2017 – 2024 | Management of IG Metall training center Beverungen |
2024 - July 2025 | 2nd Authorized Representative and Managing Director of IG Metall Augsburg |
from July 2025 | 1st Authorized Representative and Treasurer IG Metall Augsburg, Augsburg |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- None
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- Member of the supervisory board of KUKA AG (since May 2024)
Other than listed above, Ferdije Rrecaj has not been a member of any administrative, management or supervisory body of any other company or partnership outside the group within the last five years.
Head of Process Planning Manufacturing in Vehicle Transmissions division, RENK GmbH (formerly: RENK AG)
Member of the Following Committees: -
- Year of Birth: 1981
- Citizenship: German
- Initial Order: 2023
- Term: until the next election of the employee representatives (approximately 2026)
| Education | |
| 2001 – 2004 | BA in Production Technology Engineering, Glauchau |
| Professional Career | |
| 2004 – 2013 | Planning Engineer for Rotary Parts Production, MAN Roland, Plauen |
| 2013 - 2023 | Process Planner for Cubic Parts Production in Vehicle Transmissions division, RENK GmbH (formerly: RENK AG) |
| since 2023 | Head of Process Planning Manufacturing in Vehicle Transmissions division, RENK GmbH (formerly: RENK AG) |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- None.
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Other than listed above, Mario Sommer has not been a member of any administrative, management or supervisory body of any other company or partnership outside the Group within the last five years.
Member of the Supervisory Board and Chair of the Audit Committee of INNIO Jenbacher GmbH & Co OG, Jenbach, Austria and Member of the Supervisory Board and Chair of the Audit Committee of u-blox AG, Thalwil, Switzerland and Member of the Supervisory Board and Chair of the Audit Committee of technotrans SE, Sassenberg, Germany as well as Senior Advisor at Advent International GmbH, Frankfurt
Member of the Following Committees: Audit Committee (Chair)
- Year of Birth: 1969
- Citizenship: German
- Initial Order: 2024
- Term: until 2028
Education | |
1989 – 1994 | Degree in Business Administration |
1992 – 1993 | Executive Education / M.B.A. |
Professional Career | |
1995 – 2002 | Various Positions in finance and controlling, |
2002 – 2006 | Head of the General Secretariat of the CEO of Volkswagen AG, |
2007 – 2010 | Chairwoman of the Management Board, |
2010 – 2014 | Managing Director, |
2014 – 2018 | Management Board, |
2019 – 2021 | Management Board, |
2023 – 2024 | Management Board (Interim activity)/ Senior Advisor Aurelius, |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- Supervisory Board and Chair of the Audit Committee of INNIO Jenbacher GmbH & Co OG, Jenbach, Austria (since 2022)
- Independent Senior Advisor at Advent International (since 2022)
Previously:
- Supervisory Board and Chair of the Audit Committee of Vivantes Netzwerk für Gesundheit GmbH, Berlin (2014 – 2020)
- Advisory Board of carmeq GmbH (2007 – 2009)
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- Supervisory Board and Chair of the Audit Committee of u-blox AG, Thalwil/Switzerland (since 2022)
- Supervisory Board and Chair of the Audit Committee of technotrans SE, Sassenberg, Germany (since May 2025)
Previously:
- Supervisory Board and Chair of the Audit Committee of Leoni AG, Nuremberg, Germany (2022 – 2023)
- Supervisory Board and Chair of the Audit Committee of Swiss Steel Group AG, Lucerne/Switzerland (2020 – 2022)
- Supervisory Board of Schweizer Electronic AG, Rottweil/Germany (2016 – 2019)
- Supervisory Board of Extessy AG (2007 – 2009)
Other than listed above, Karin Sonnenmoser has not been a member of any administrative, management or supervisory body of any other company or partnership outside the Group within the last five years.
Independent Director of Trillium Flow Technologies Holdco Ltd, United Kingdom
Former Chairman of Kelvion Holding GmbH, Bochum, Germany
Member of the Following Committees: Mediation Committee
- Year of Birth: 1960
- Citizenship: German
- Initial Order: 2023
- Term: until 2028
Education | |
1980 – 1986 | Diplom-Wirtschaftsingenieur (Degree in Business Administration and Electrical Engineering), TH Darmstadt, Darmstadt |
Professional Career | |
1986 – 1987 | Assistant of the Head of the Market Research and Planning Business Unit, Carl Schenk AG, Darmstadt |
1986 – 1990 | Department Manager Purchasing, Krupp Fördertechnik, Rheinhausen |
1991 – 1995 | Business Unit Manager Logistics, Krupp Fördertechnik, Essen |
1995 – 1999 | Managing Director Krupp South Africa, Krupp Fördertechnik, South Africa |
1999 – 2001 | Head of the Transportation Division, Krupp Fördertechnik, Enningerloh |
2001 – 2006 | CEO, Allweiler AG, Radolfzell |
2006 – 2007 | Managing Director European Bearing Business Unit, NSK Deutschland GmbH |
2007 – 2011 | Member of the Executive Board and responsible for the power engineering division (MAN Diesel&Turbo SE and RENK AG), MAN SE, Munich |
2012 – 2015 | CEO, Sulzer, Winterthur, Switzerland |
2018 – 2021 | Chairman of the Supervisory Board, Kelvion Holding GmbH, Bochum, Germany |
since 2020 | Trillium Flow Technologies Holdco Ltd, Independent Director, London, United Kingdom |
Other Mandates
Membership in supervisory boards and comparable regulatory bodies of unlisted companies:
- Independent Director Trillium Flow Technologies Holdco Ltd, London, United Kingdom (since 2020)
Previously:
- Chairman of Kelvion Holding GmbH, Bochum, Germany (2016 – 2020).
Membership in supervisory boards and comparable regulatory bodies of listed companies:
- None.
Other than listed above, Klaus Stahlmann has not been a member of any administrative, management or supervisory body of any other company or partnership outside the Group within the last five years.
¹ Chairman
² Employee representative
³ independent members of the Supervisory Board
Qualification Matrix
The supervisory board of RENK Group AG has summarised its evaluation of the status of implementation of the skills profile in a qualification matrix (as at December 2024).
Remuneration of the supervisory board
The remuneration of the Supervisory Board members is set out in Section 15 of the articles of association of RENK Group AG. The Annual General Meeting 2024 has confirmed the remuneration, including its underlying remuneration system, with a majority of 99.99% of the votes.
