Sonja Keizer has been Head of Finance since January 2023. Sonja and her team of 6 are responsible for internal and external financial reporting according to HGB and US GAAP as well as taxes and dunning. Sonja has several years of experience as a controller and commercial manager at companies in the media industry and energy supply. Sonja’s many years of coaching experience began in 2009 with training at the European Business School. As an open-minded team player with a lot of curiosity for new topics, Sonja is characterised by an emphatic attitude towards life.