Volker Cwielong was appointed CEO of Datwyler at the beginning of April 2024. Before joining Datwyler, he had been a member of the management team of the globally present Eberspächer Group since 2017 and led the Purem by Eberspächer division.

Prior to that, Volker Cwielong held various global management positions for international industrial groups and automotive suppliers from 2004 to 2017. Volker Cwielong holds a Master of Science in Mechanical Engineering and a Master of Business Administration. He completed further management and leadership training at INSEAD and IMD.

Judith van Walsum has been a member of the Datwyler Executive Committee since 2024 and, as Chief Financial Officer, heads the Finance & Shared Services Group Function. Previously, she was a representative of the public shareholders on the Board of Directors of Dätwyler Holding Inc. for two years and a member of the Audit Committee.

Judith van Walsum was Chief Financial Officer (CFO) and Head of IT at Roche Diabetes Care, a globally operating business unit within the Roche Group, from 2018 to 2024. From 2004 to 2018, the Dutchwoman has held diverse global managerial functions for Roche, among which Head HR Operations (Group HR) and Head of Finance and Intercompany Supply Chain (Roche Diagnostics). From 1999 to 2004, she was Senior Manager in Financial Strategy, Process and Transformation for KPMG in Frankfurt. Judith van Walsum has undergone studies at several universities and has a PhD in international political economy at the London School of Economics.

Cindy Reiss-Clark was appointed Chief Operating Officer (COO) of the Healthcare Division and member of the Executive Board of Datwyler effective April 2026. She brings more than 20 years of international leadership experience in the pharmaceutical and biotechnology industry, with a strong focus on commercial strategy, growth and operational execution.

Prior to joining Datwyler, she served as Chief Commercial Officer and member of the Executive Leadership Team at West Pharmaceutical Services, a globally listed leader in pharmaceutical packaging and delivery systems. In this role, she was responsible for global commercial operations and strategic growth initiatives. Earlier in her career, she held senior leadership positions at West Pharmaceutical Services, Lonza Group and Sigma-Aldrich (SAFC), leading global sales, marketing and business units across North America and Europe. Having lived and worked in the United States, Great Britain and Switzerland, she brings a deep understanding of international healthcare markets and the global healthcare supplier landscape.

Cindy Reiss-Clark holds a Bachelor of Arts in Biochemistry from the University of Kansas and has completed executive education programs at Harvard University and CEIBS.

Michael Höller has been a member of the Datwyler Executive Committee since the beginning of February 2025 and heads the Division Industrial. Before joining Datwyler, he worked for the global automotive supplier Purem by Eberspächer for six years, most recently as Executive Vice President Business Unit Europe and Leader Global Operations. In this position, he was responsible for the global production network including manufacturing engineering, quality and logistics as well as for the strategic direction of the European business.

From 2007 to 2018, he held various global management positions in production management at WABCO (now part of ZF). In total, he has more than 30 years of experience in production and quality management for various global industrial companies and automotive suppliers. Michael Höller holds a degree in Industrial Engineering.

Frank Schön has been a member of Datwyler’s Executive Committee since February 2020 and, as Chief Technology Officer, heads the Technology & Innovation Group Function. Prior to that, he was Vice President R&D and Innovation, responsible for global research and development in the Sealing Solutions division since 2013.

From 2004 to 2012, he held various management positions in research and development in the Sealing Technologies division.

Frank Schön completed his studies in chemistry at the University of Bayreuth, Germany, with a master’s diploma and then earned his PhD at the University of Freiburg, Germany. In addition, he holds an MAS in Business Administration and Engineering from the University of Lucerne.