Mr. Zumstein started his career with Sandoz in 1993 as Corporate Internal Auditor. In 2000, he joined Clariant as Corporate Controller Europe, then holding a number of corporate and operational, global and regional roles in the Finance function of Clariant throughout Europe and Asia. In 2013, he joined Archroma, when the company was created from Clariant’s Textile Chemicals, Paper Specialties, and Emulsions businesses, as Head of Group Finance & Controlling with the mission to establish the finance services and processes of the new group. In May 2015, he became Head of Group Controlling, focusing on driving business/financial performance management to support the company's development ambitions.
In February 2018, Mr. Zumstein was appointed as President Commercial Region Asia, and in June 2020 as Senior Vice President, Sales Asia Pacific. He is in charge of all regional operations, in addition to sales, since November 2020.
He is Chief Commercial Officer, in addition to his role as Senior Vice President, Sales Asia Pacific, since August 2021.
A French National, Mr. Zumstein graduated from ESSEC Business School in Paris, France, and has a PhD in Political Science from the University of Strasbourg, France.