Felix Mayrhofer-Grüenbühl is a retired auditor. He specialized in auditing multinational companies and banks, and was an early expert in International Financial Reporting Standards. Besides Austria, he worked in Brazil, Hungary, Slovenia, and Slovakia.

In addition to his business activities, Felix was involved with professional bodies in Austria, and he continues to be active in non-profit organisations, such as the Austrian-Brazilian Association, as well as in social, religious and cultural initiatives.

Felix holds a degree in law from the Vienna University and was qualified as an auditor in Austria. He is fluent in English, Portuguese, French, and manages Spanish and Slovakian.