David Martin serves as the Chair of Medical Theory, Integrative and Anthroposophic Medicine, and Institute Director at Universität Witten/Herdecke since July 2017. Additionally, David Martin has been involved with Die Filderklinik since October 2011, specializing in Pediatric Endocrinology, Diabetology, Oncology, and Hematology, where services were established under David Martin's leadership. Prior experience includes a role as a Pediatric Oncologist and Hematologist at Universitätsklinikum Tübingen from July 2007 to October 2011, and training in Pediatric Endocrinology and Diabetology at Universität Tübingen from July 2001 to October 2011, with further fellowship training at Princess Margaret Hospital for Children from September 2003 to December 2004.