Jean-Jacques Simon is a Vascular Surgeon. He practiced denudation accesses before moving to percutaneous accesses under ultrasound. He worked in the Paoli-Calmettes Cancer Institute in Marseille, France, and created a Vascular Access Unit there. He was able to train many French and foreign colleagues in all techniques including his successors. He also was a teacher in many structures and trained his colleagues. Today, he is still publishing in his field.