Rainer Siebold, MD trained at the Ruprecht-Karls University, Heidelberg, Germany. He gained first international experiences at St. Vincent Hospital, Manhattan, N.Y. and at Boston University Hospital. After his graduation in 1996 he worked in Orthopaedics and Traumatology at the University Hospital of Mannheim before moving on to Melbourne, Australia for knee fellowships. Back in Germany in 2004 he specialised on open knee surgery and arthroscopy of the knee. His research work focuses on anatomy of the ACL, surgical techniques of footprint ACL reconstruction, meniscus and cartilage transplantation. In 2007 he was selected for the AOSSM-ESSKA Sports Medicine Traveling Fellowship and the AGA-Pittsburgh Fellowship. Since 2008 he is Chief Consultant for knee surgery and arthroscopy at the Center for Hip- Knee- and Foot Surgery and Sports Traumatology at the ATOS Hospital in Heidelberg and lecturer of Heidelberg University. In 2009 he gained his ‘Habilitation’ at the Institute of Anatomy and Cell biology of Ruprecht-Karls University Heidelberg, on the double-bundle structure of the ACL and its reconstruction. In 2012 he became Co-Editor of the Journal of the European Society of Sports Traumatology, Knee Surgery and Arthroscopy (ESSKA) and also Chair of the Knee Committee of ESSKA. Dr. Siebold is an honorary member of the American Orthopaedic Society for Sports Medicine (AOSSM), member of ISAKOS, the ACL Study Group and the Australian Knee Society.