Dr Sideris obtained his MD degree in 1997 at the Université Laval. He completed his residency in General Surgery at the Université de Montréal and became Fellow of the Royal College of Physicians ans Surgeons of Canada in 2002. From 2002 to 2004, he conducted his fellowship training at the Gustave-Roussy Cancer Institute in Paris, France, and received a diploma in Clinical Oncology from the Université Paris XI in 2003.

His main areas of interest are: breast cancer, peritoneal surface malignancies, clinical research and teaching. From 2014 to 2016, he was the Associate Program Director of General Surgery at the Université de Montréal. Since July 2016, he is the Program Director of the Surgical Foundations at the Université de Montréal.