He has served as member of the Administrative Board of Evangelismos Hospital, of the Scientific Committee of the National Research Foundation, Head of the studies program Curriculum Committee of Athens Medical School, Chair or Member of Training Programs of the Central Health Council, and Coordinator of the Committee for the Modernization of the Greek Healthcare Service. He has been the Greek Representative to the World Health Organization (WHO) for tobacco-related issues and a leading figure in the fight against smoking in Europe: he was instrumental in passing the laws of banning tobacco advertisement in Europe, advocates smoking cessation and is still in charge of smoking cessation projects.