He is an Associate Professor of Orthopaedic Surgery at Hosta Northwell School of Medicine and Investigator at Feinstein Institute. He is interested in general orthopaedics (upper nd lower extremity), hand and wrist surgery, and peripheral nerve injury and fracture care (upper and lower extremity). He was trained in orthopaedics and hand surgery in Beijing, Sydney, and Charleston SC. He is also an established researcher in orthopaedic surgery. Dr. An has published more than 100 papers / book chapters, more than 200 abstracts, and six books including Internal Fixation in Osteoporotic Bone, and Mechanical Testing of Bone and the Bone-Implant Interface, and Handbook of Bacterial Adhesion.