After training to become an industrial business management assistant, Cathrina Claas-Mühlhäuser studied business administration at the Swiss University of St. Gallen. After completing her MBA, she worked in both Switzerland and Chile for the multinational corporation ABB, a producer of automation and energy technology. Claas-Mühlhäuser has been the Deputy Chair of the CLAAS Shareholders‘ Committee since 2004; since 2010, she has also occupied the role of Chair of the Supervisory Board at CLAAS KGaA mbH.
Her external roles include a seat on the Supervisory Board of KWS Saat AG, which she has held since December 2007 and the Advisory Council of Commerzbank AG since 2008. Mrs Claas-Mühlhäuser is also a member of the German Committee on Eastern European Economic Relations (Ost-Ausschuss der Deutschen Wirtschaft), as well as being a Member of the Board of the Asia-Pacific Committee of German Business (Asia-Pazifik Ausschuss der Deutschen Wirtschaft).
The Harper Adams University in Great Britain awarded an honorary doctorate to Mrs Cathrina Claas-Mühlhäuser in May 2018.
Cathrina Claas-Mühlhäuser is married with three children.