Doerthe has more than 20 years experience in the field of food stabilisation. Initially at
G. C. Hahn & Co., later Tate & Lyle Food Systems as an assistant in the field of sample production/prototypes for customer presentations, which she later took over on their own responsibility. In 2004 she was responsible for customer projects as a project technologist, delivering focused innovative products and new creative flavour combinations. Until 2013 Doerthe worked as product developer at Terheggen & Dethlefsen.