She first rode a horse at the age of two, sitting on her father’s lap, and took up equestrianism at a young age. Her career was interrupted by the Second World War and she did not resume riding until 1950. She became a pupil of Willi Schultheis and competed at the Rome Olympic Games where she finished seventh. Rosemarie retired from competition in the late 70s, having won the German Woman’s Dressage Championship, seven times.