In-Soo Song, MD, PhD, is an orthopedic surgeon and currently the Chief of the Department of Orthopedic Surgery at Daejeon Sun Hospital, Republic of Korea. He received his medical degree from Chungnam National University College of Medicine in 1994 and later completed both a master’s and PhD degree in orthopedic surgery at Chungnam National University Graduate School. Dr. Song previously served as Director of Orthopedic Services at Seoul St. Mary’s Hospital from 2002 to 2003 before joining Daejeon Sun Hospital in 2004, where he has led the department for more than 20 years. His clinical and research interests include joint preservation surgery, arthroplasty, trauma, and sports medicine. Dr. Song is recognized for his extensive experience in complex reconstruction and leadership in regional orthopedic care, and he continues to contribute to medical education and clinical outcome improvement.