Dr. Déjardin came to the United States in 1989 as MSU’s first International Surgical Fellow. He continued his clinical and academic training as a surgery resident and master of science student. He then further specialized in comparative orthopedic research under Dr. Arnoczky’s mentorship. Dr. Dejardin and his team produced numerous research projects and scientific papers, as well as national and international presentations. Dr. Déjardin is currently professor and head of orthopedic surgery in the Department of Small Animal Clinical Sciences where his activity is equally divided between research and clinic teaching/service.

Dr. Déjardin's research activities include biomechanics and implant design. As an orthopedic surgeon, he also specializes in minimally invasive surgery, pediatric traumatology, joint replacement, and revision surgery.