A firm believer in the need to contribute to teaching and training, Dr Chang is a Clinical Lecturer with the National University of Singapore. For his contribution to undergraduate medical teaching of orthopaedic surgery, he was awarded the "Best Orthopaedic Teacher" award for consecutive terms of 2003-2004 and 2005-2006. As the Director of the Orthopaedic Sports Medicine at Changi General Hospital, he has trained surgeons from the Asian region in Orthopaedic Sports Medicine. He has also organized cadaveric workshops in Shoulder Arthroscopy, Knee Double-Bundle Anterior Cruciate Ligament Reconstruction as well as Autologous Chondrocyte Transplantation to train both local and international orthopaedic surgeons in these advanced techniques.

An avid researcher, Dr Chang has published over 20 peer-reviewed papers, a majority on Orthopaedic Sports Medicine in prestigious Sports Medicine journals such as the American Journal of Sports Medicine and the Arthroscopy Journal. Dr Chang has contributed a book chapter on "Allograft Anterior Cruciate Ligament Reconstruction" in the 4th edition of Insall and Scott Surgery of the knee, a "bible" for knee surgeons. He also co-authored a new surgical technique in double-bundle anterior cruciate ligament reconstruction. He has been invited to speak on many issues related to sports medicine, at local and international meetings.