Supervisory Board

Harald Martin

Harald Martin


Harald is Senior Vice President in the SAP Customer Success board area, leading the Services Partner Business Development with a focus on the acceleration of the adoption of SAP’s Cloud offerings, jointly with our strategic System Integrators. Prior to this appointment, Harald was Senior Vice President in the SAP Global Partner Operations organization, responsible for the channel expansion strategy to identify and build additional indirect revenue streams. Earlier Harald held various roles including head of Strategic Service Partners, SAP’s Internet / Intranet strategy, corporate business development and joint go-to-market with partners for SAP products such as NetWeaver, ERP, Analytics and MDM.

Harald is an SAP veteran with over 29 years of experience in various roles. In particular he has an outstanding expertise in strategic alliances, partner business development, sales, complex project management and a broad understanding of and experience in American, European and Asian business cultures.

He is located at the SAP Corporate Headquarters in Walldorf, Germany.

Dr. Heiner Diefenbach

Vice Chairman

Heiner is CFO at SNP Schneider-Neureither & Partner SE. Prior to this, he was a member of the management of Engineering ITS AG, the German entity of Engineering SPA, Italy and CEO of DST IT-services GmbH, a subsidiary which focussed on outsourcing and SAP consulting.  Before that, he served as the CEO of TDS Informationstechnologie AG and was the Vice President for Services Central Europe for Fujitsu. After being awarded his Ph.D. by the Technical University of Kaiserslautern, Heiner started his career with Deutsche Bank before moving to CSC Ploenzke AG, where he rose to becoming a member of the board and being responsible for Finance for the AG and the company’s business operations in Austria and Switzerland. After four years as a board member of Ploenzke, Heiner took on several leadership roles before joining the board of TDS in 2005, where he has been a member of the board ever since and took over as CEO in 2008. At TDS, he oversaw the successful turnaround and was instrumental in achieving a significant rise in profitability and revenue.

Besides his corporate leadership functions, Heiner is a member of several supervisory boards and serves as a lecturer at the Technical University of Darmstadt. He furthermore authored several books and articles and serves on the board of the VWI (Verband Deutscher Wirtschaftsingenieure e.V.).

Martin Stillger


Martin is CEO of the Materials Germany and Western Europe Organization of the Materials Services business area at thyssenkrupp. He is head of the top Steel Trading and Distribution Group in Europe. Prior to this, he was responsible for the Industrial Service business unit at thyssenkrupp Materials. Previously, Martin spent 17 years at Barmag, the world’s leading manufacturer of manmade fiber machinery, during which time he spent five years as a board member and five years as CEO of the company.

Martin holds a degree in mechanical engineering and has spent many years in sales and marketing-related functions. He has also held various chairs on international supervisory boards within and outside his main area of responsibility.

He is based at the thyssenkrupp headquarters in Essen, Germany.