Executive Board

Dr. Michael Heckmeier

Chief Executive Officer

Appointed until May 5, 2026


Born: November 26, 1967
Nationality: German

Professional Career

Since May 2023: Chief Executive Officer of Siltronic

2018: Executive Vice President, Global Head of Business Unit Display Solutions, Merck KGaA

2017: Executive Vice President, Global Head of Business Unit Display Materials, Merck KGaA

2015: Senior Vice President, Global Head of Business Unit Pigments and Functional Materials, Merck KGaA

2010: Senior Vice President of Liquid Crystal Research and Development, Merck KGaA

2006: Senior Director Chilworth Technical Centre, Merck Chemicals Ltd., Southampton, United Kingdom

2005: Director Polymers at Merck OLED Materials GmbH

2004: Director New Venture Materials, Merck KGaA

2003: International Project Manager, Merck KGaA

1998: Lab Manager, Merck KGaA


2006: Executive MBA, Pforzheim University of Applied Sciences 

1998: Doctorate in Physics at University Konstanz

1994/96: Studied Physics & Mathematics at Albrecht-Ludwigs University Freiburg

Claudia Schmitt

Chief Financial Officer

Appointed until June 30, 2026



Born: October 31, 1971
Nationality: German


Professional Career

Since July 2023: Chief Financial Officer of Siltronic AG

2017: Head of Controlling & Finance, Siltronic

2009: Head of Controlling, Siltronic

2004: Team Lead Corporate Controlling, Wacker Chemie AG

1998: Corporate Controlling, Wacker Chemie AG


1998: Diploma in Business Administration at Saarland University, Saarbrücken, Germany

Klaus Buchwald

Chief Operating Officer

Appointed until May 31, 2026



Born: July 16, 1968
Nationality: German


Professional Career

Since June 2024: Chief Operating Officer of Siltronic AG

2017: Executive Vice President Operations Industrial Power Control Division, Infineon Technologies AG

2013: Vice President Corporate Supply Chain Management, Rohde & Schwarz

2008: Vice President and Managing Director Site Warstein, Infineon Technologies AG

2005: Senior Director Operation Planning & Controlling, Infineon Technologies AG

2002: Head of Operations Secure Mobile Solutions, Infineon Technologies AG

1998: Head of Logistics & Production Management Chipcard & Security, Infineon Technologies AG

1994: Consultant and Project Leader, ConMoto Consulting


1994: Diploma in Industrial Engineering, Munich University of Applied Sciences

1991: Diploma in Mechanical Engineering, Augsburg University of Applied Sciences

Supervisory Board

The Siltronic AG Supervisory Board currently comprises the following 12 members:

Shareholder representatives

Dr. Tobias Ohler

Supervisory Board Chair
Member of the Wacker Chemie AG Executive Board


Mariella Röhm-Kottmann

CFO of Sunlight Energy Storage Systems Industrial and Commercial Societe Anonyme


Sieglinde Feist

Head of Sales & Distribution, Wacker Chemie AG


Dr. Hermann Gerlinger

Managing Partner of GeC GmbH


Michael Hankel

Member of the Supervisory Board of Siltronic AG


Dr. Jos Benschop

Executive Vice President Technology of ASML Netherlands BV, Netherlands


Employee representatives

Daniela Berer

Deputy Chairman of the (Joint) Works Council of
Siltronic AG, Burghausen/Munich


Mandy Breyer

Deputy Chairman of the General Works Council of Siltronic AG, Freiberg site


Klaus-Peter Estermaier

Head of Supply Chain Center & Strategic Planning, Siltronic AG



Volker Stapfer

Chairman of the General Works Council of Siltronic AG, Burghausen site


Lina Ohltmann

Specialised Secretary of the Industrial Union IGBCE, Union Pay Policies Department


Markus Hautmann

District Manager of the Mining, Chemical and Energy Industrial Union (IG BCE), Altötting