Axel Hennes was one of the senior PTs of the Asklepios Katharina Schroth Clinic in Germany. Since 1990 he was in charge of the educational part of the Schroth method. He has mainly inuenced the course system in Germany and started in 2008 as an international Schroth Senior Instructor to offer international Schroth courses in the English language. Since that time, he has developed the ISST (International-Schroth 3dimensional Scoliosis Therapy) program concentrating on a conservative out-patient therapy approach. He is a member of the SOSORT society since 2008. He is working more autonomous since 2015, together with a multidisciplinary team of scoliosis experts in the Asklepios out-patient Scoliosis-Centre, Sanomed. ISST-Schroth is part of the Spine-Concept-Asklepios, which he and his colleagues have developed for scoliosis patients. In 2015 he founded ISST-International providing educational programs for experts in the conservative treatment team for scoliosis, especially for physical therapists, orthopedic technicians, and physicians. Courses all around the world have fostered his experience in teaching and developing Schroth therapy.