Olivier Sitbon is pulmonologist, Professor of Respiratory Medicine at Université Paris-Saclay and consultant at the French Pulmonary Hypertension (PH) Referral Center in Hôpital Bicêtre, France. He is the current chair of the Assembly on pulmonary vascular diseases of the European Respiratory Society (ERS). He has conducted extensive research in PAH and is the scientific leader of the French PH Registry.

His investigational activities include clinical studies on the identification of prognostic factors, risk stratification and treatment goals in pulmonary arterial hypertension (PAH), and the development of new drugs and strategies for the treatment of PAH.

He was involved in every World PH Symposia over the past two decades and has chaired the PAH Treatment Algorithm Working Group of the 7th World Symposium on PH in 2024. He was a task force member and section editor of the 2022 ESC-ERS Guidelines for the diagnosis and treatment of PH. He has authored more than 460 peer-reviewed articles on PH and related topics in the New England Journal of Medicine, Lancet Respiratory Medicine, Circulation, Journal of the American College of Cardiology, American Journal of Respiratory and Critical Care Medicine and European Respiratory Journal, amongst other scientific journals.