Dr Müller studied medicine at the Humboldt University in Berlin and trained as a specialist surgeon at the Charité and the Carl Thiem Hospital in Cottbus. As a research assistant, he did his doctorate under Prof. Harald Mau in paediatric surgery at the Charité on the subject of "Liver transplantation in childhood". In 1995, he joined Prof. Dieter Havemann as an assistant and later as a senior physician in the Department of Trauma Surgery at the UKSH, Kiel Campus. In addition to paediatric traumatology, his main focus is on spinal surgery, including so-called geriatric traumatology and osteoporosis.