Prof. Dr. Jang Hang Seok stands as one of the most highly sought-after surgeons in Korea, renowned for his exceptional expertise in endocrine surgery, maxillofacial surgery, oncology, and metabolism and nutrition. With an illustrious career spanning over 18 years, he currently holds a prominent position at Gangnam Severance Hospital in Seoul, where he continues to make significant contributions to the field of surgery. Dr. Jang Hang Seok's educational journey includes earning his MD degree from the esteemed University of Yonsei, where he underwent comprehensive medical and surgical education. Additionally, he pursued specialized training in general surgery at the Faculty of Medicine, University of Yonsei, further honing his skills. Driven by a commitment to excellence, he embarked on his professional career, starting as an internee at the prestigious Sloan Kettering Memorial Cancer Center in the USA. Over the years, Dr. Seok has garnered recognition for his hard work and dedication. His contributions extend to academia, where he serves as an adjunct professor at the Faculty of Medicine, University of Yonsei. Notably, he has ascended to the position of director of the department of surgery at Gangnam Severance Hospital in Seoul, solidifying his reputation as a leader and expert in the surgical field.